LC; LFA 1/68 RE 21 050/02.03
© 2003
by Bosch Rexroth AG, Industrial Hydraulics, D-97813 Lohr am Main
All rights reserved. No part of this document may be reproduced or stored, processed, duplicated or circulated using
electronic systems, in any form or by any means, without the prior written authorisation of Bosch Rexroth AG.
In the event of contravention of the above provisions, the contravening party is obliged to pay compensation.
Overview of contents
Contents Page
Function, section, symbols
– General 2
– Pressure relief function 2
– Pressure reducing function 2 to 3
– Pressure sequencing function 3
– Cavity and porting pattern 4
Pressure relief function:
– Cartridge valve type LC . DB…:
•Ordering details 5
•Symbols 5
•Technical data 5
•Characteristic curves 6 to 11
•Seal kits 12
•Compression springs 12
•Preferred types 12
– Control cover type LFA . DB…:
•Ordering details (general) 13 to 14
•Technical data 14
•Pilot valves 15
•Symbols (basic symbols) 16
•R-rings for pilot oil connections 17
•Seal kits 17
•Fixing screws 17
• Orifice dimensions 17
RE 21 050/02.03
Replaces: 02.99
2-way cartridge valves; pressure functions
Cartridge valves type LC...
Control covers type LFA...
Nominal sizes 16 to 100
Series 6X; 7X
Maximum operating pressure 420 bar
Maximum flow 7000 L/min
Cartridge valve type LC 25 DB40E-7X
Control cover type LFA 25 DBW2-7X/315 with manual pressure
adjustment, electrical unloading with built-on directional valve.
H/A/D 5593
Contents Page
Ordering details, symbols and unit dimensions:
–TypeDB 18 to 20
–Types DBW; DBS 21 to 25
–Type DBWD 26 to 28
–Type DBU2 29 to 32
–Type DBU3D 33 to 37
–TypeDBE 38
–TypeDBEM 39 to 42
Pressure reducing function:
– Cartridge valve type LC . DR…:
•Ordering details 43
•Symbol 43
•Technical data 43
•Characteristic curves 44 to 46
•Seal kits 47
•Compression springs 47
– Control cover type LFA . DR…:
•Ordering details (general) 48
•Symbol 48
•Technical data 49
•Pilot valve 49
•Symbols (basic symbols) 50
Continued on page 2
RE 21 050/02.99 2/68 LC; LFA
F**
X
A
Y
B
X**
T
B
A
X
Y
X**
F**
A
4
6
1
3
2
5
B
Overview of contents
Contents Page
•R-rings for the pilot oil connections 51
•Fixing screws 51
• General dimensions 52
Ordering details, symbols and unit dimensions:
–Type DR 53 to 54
–Type DRW 55 to 56
–Types DREV; DREZ 57 to 58
–Types DREWV; DREWZ
Contents Page
Pressure sequencing function:
– Control cover type LFA . DZ…:
•Ordering details (general) 61
•Symbols (basic symbols) 61
•Technical data 62
•R-rings for the pilot oil connections 62
• Seal kits 63
•Fixing screws 63
• Orifice dimensions 63
Ordering details, symbols and unit dimensions:
–Type DZ 64 to 65
–Type DZW 66 to 67
Function, section, symbols
General
The 2-way cartridge valves for pressure control functions are pilot
operated poppet or spool valves. The main component designed as a
cartridge valve (1) is inserted into a cavity which is standardised to
DIN ISO 7368 and is sealed by the control cover (2).
The pilot valve (4) for either manual or electrical proportional pressure
control is integrated into the control cover (2) or mounted onto the
control cover (2) as a pilot valve with interface connections to DIN
24 340.
By combining the cartridge valve with the control covers different
pressure functions can be realised.
LC..DB.D...
LC..DB.E...
Pressure relief function
Control cover type LFA..DB...
Cartridge valve type LC..DB...
The cartridge valve (1) for the pressure relief function (type LC . DB…)
is a poppet valve without an area differential (no effective area at
port B). The pressure acting at port A is fed via the pilot supply orifice
(5) to the spring side (6) of the element. At pressures below the
setting of pilot valve (4) the forces on spool (3) are balanced and the
spool remains closed due to the spring force. On reaching the set
pressure, spool (3) opens and limits the pressure at port A in relation
to the pressure-flow characteristics.
Pressure reducing function
a) Normally open: Control cover type LFA..DB...
Cartridge valve type LC..DR...
The cartridge valve for the pressure reducing function is a spool valve
without an area differential (no effective area at port B).
The same types of cover are used as pilot valves that are used for the
pressure relief functions (type LFA..DB...).
The pressure acting at port A is fed to the spring side of the spool via
the pilot oil supply orifice. Below the performance limit and pressure
set at the pilot valve, the spool is pressure-balanced and is held open
by the spring force, so that oil is free to flow from port B to port A.
On reaching the set pressure, the spool closes and reduces the pressure
at port A in relation to the pressure-flow characteristics.
Type LFA..DB...
Type LC..DB...
E.g.
Type LFA..DB...
Type LC..DR40...
RE 21 050/11.02
LC; LFA 3/68 RE 21 050/02.99
X
Y
X**
F**
M
A
B
Z2
X
A
B
Y
Z2 Z1
HD ND
p
S
RV
X
A
B
Y
Z2
Z1
Function, symbols
b) Normally closed:
Control cover type LFA..DR...
Cartridge valve type LC..DB40D...
For the pressure reducing function with opening characteristics a
pressure relief valve cartridge (type LC..DB40D...) and a control cover
with a pressure reducing valve (type LFA..DR...) as the pilot valve are
used. The pilot oil is fed from port A via the pilot supply orifice and
the open pilot valve to side B.
The main spool opens and allows free-flow from port A to port B.
On reaching the set pressure, the spool closes and reduces the pressure
at port B in relation to the pressure-flow characteristics. Possible excess
pressures occurring on the secondary side are led away to tank via
the third port of the pilot valve. By fitting a directional valve, an addi-
tional isolating function can also be attained (type LFA..DRW...).
Example 2: (circuit for the pressure dependent sequencing of a
2nd system)
With this circuit, oil is allowed to flow into system 2 when the pressure
in system 1 has reached a pre-set value. The pilot oil supply is internal
from port A of the main valve.
System 2
Circuit examples
Example 1: (circuit for the pressure dependent unloading of the
low pressure system)
In the circuit shown, the system is fed by a high pressure pump and
a low pressure pump. The system pressure
p
S
acts externally from the
high pressure side via the pilot oil port X on the pilot valve which, on
reaching the set pressure, switches the low pressure side to give zero
pressure circulation. The check valve RV (not included within the scope
of supply) prevents the high pressure system from flowing into the
low pressure system which is now at zero pressure.
Pressure sequencing function
Control cover type LFA..DZ...
Cartridge valve type LC..DB...
This function enables a pressure-dependent sequencing of a second
system.
The required sequencing pressure is set by the pilot valve which is
integrated into the control cover.
The pilot oil supply may be either external (pilot oil port X) or internal
(from port A via pilot oil port X or Z2).
The spring chamber of the pilot control is drained at zero pressure
via ports Y or Z1 to tank.
System 1
E.g.
Type LFA..DR...
Type LC..DB40D...
E.g.
Type LFA..DZ...XY
Type LC..DB20D...
E.g.
Type LFA..DZ...Y
Type LC..DB20D...
When the pressure set at the pilot control spring is reached, the pilot
valve switches and unloads the spring chamber of the main valve to
tank. The main spools opens and makes the connection from port A
to B possible.
In version LFA..DZW..., the required spool position may be selected
by means of an electrically operated pilot valve (not included with
the scope of control cover LFA..DZW... supply) in addition to the nor-
mal hydraulic control.
RE 21 050/02.99 4/68 LC; LFA
=
X
=
Y
=
Z
R
max
4
R
max
8
R
Z
10
L1
L2
±0,2
L5±0,2
L4±0,2L4±0,2
L4±0,2L4±0,2
L3±0,2
L1
4 x D5; H4
ØD7
H13
; 10
ØD6 max.
(X,Y,Z1,Z2)
Z1
Y
X
Z2
L2±0,2
L5±0,2
ØD6 max.
(X,Y,Z1,Z2)
ØD7
H13
; 10
5
8
L3±0,2
6
8 x D5; H4
ØD7
H13
; 10
ØD6 max.
(X,Y,Z1,Z2)
L2
±0,3
L1
35°
22,5°
45°
Z1
Y
Z2
X
5
X
Y
A
ØD1
H7
W
T
H8
15°
H1
(H1*)
ØD3
(D3*)
15°
H9
A
B
ØD2
ØD4
H7
H7H6
H5
H3
±0,1
H2
+0,1
A
0,05
Z
Z
Z
71
71324
Installation cavity and porting pattern to DIN ISO 7368 (Dimensions in mm)
NS 80, 100
NS 16 to 63
1 Depth of fit
2 Reference dimension
3 For diameters of port B other than ØD3 or (ØD3*), the distance
from the cover mounting surface to the centre of this hole must
be calculated.
4 Port B may be moved about the central axis of port A. Care
must however be taken to ensure that the fixing holes and
control holes are not damaged.
5 Drilling for location pin (cover location pin fitted to
DIN 24 342)
6 Note on NS 16 porting pattern:
Length L1 (axis x–y drilling) is 80 mm.
7 For Ø ≤ 45 mm → fit H8 is permitted!
8 Drilling for locating pin with functions as a main pressure relief
valve (cover locating pin has to be appropriately relocated
during assembly)
1)
Max. dim.
NS 16 25 32 40 50 63 80 100
ØD1
H7
32 45 60 75 90 120 145 180
ØD2 16 25 32 40 50 63 80 100
ØD3 16 25 32 40 50 63 80 100
(ØD3*) 25 32 40 50 63 80 100 125
ØD4
H7
25 34 45 55 68 90 110 135
ØD5 M8 M12 M16 M20 M20 M30 M24 M30
ØD6
1)
4681010121620
ØD7
H13
4666 881010
H1 34 44 52 64 72 95 130 155
(H1*) 29.5 40.5 48 59 65.5 86.5 120 142
H2 56 72 85 105 122 155 205 245
H3 43 58 70 87 100 130
175
±0.2
210
±0.2
H4 20 25 35 45 45 65 50 63
H5 11 12 13 15 17 20 25 29
H6 2 2,5 2.5 3 3 4 5 5
H7 20 30 30 30 35 40 40 50
H8 2 2.5 2.5 3 4 4 5 5
H9 0.5 1 1.5 2.5 2.5 3 4.5 4.5
L1 65/80 85 102 125 140 180 Ø250 Ø300
L2 46 58 70 85 100 125 Ø200 Ø245
L3 23 29 35 42,5 50 62.5 – –
L4 25 33 41 50 58 75 – –
L5 10.5 16 17 23 30 38 – –
W 0.05 0.05 0.1 0.1 0.1 0.2 0.2 0.2
LC; LFA 5/68 RE 21 050/02.99
A
B
A
B
A
B
A
B
Pressure relief function
Ordering details: pressure relief cartridge valve (without control cover)
No code = NBR seals
V FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
7X = (NS 16 to 63) Series 70 to 79
(70 to 79: unchanged installation and connection dimensions)
6X = (NS 80 and 100) Series 60 to 69
(60 to 69: unchanged installation and connection dimensions)
E = Poppet valve without orifice (standard)
D = Spool poppet valve without orifice (standard)
A = Poppet valve with orifice
B = Spool poppet valve with orifice
Nominal size 16 = 16
Nominal size 25 = 25
Nominal size 32 = 32
Nominal size 40 = 40
Nominal size 50 = 50
Nominal size 63 = 63
Nominal size 80 = 80
Nominal size 100 = 100
Opening pressure approx. 0 bar (without spring) = 00
Opening pressure approx. 2 bar = 20
Opening pressure approx. 3 bar = 30
1)
Opening pressure approx. 4 bar = 40
Opening pressure approx. 5 bar = 50
2)
Opening pressure approx. 8 bar = 80
3)
(Series 7X)
(Series 6X)
LC DB
Preferred¡ types, see page 12, are
readily available!
1)
Opening pressure 3.0 bar only with NS16 for fitting a pilot
operated pressure relief valve type DBC . -5X/…SO187 (see
catalogue sheet RE 25 802)
2)
Only with NS 16, 25 and 32
3)
Special installation space is required (see page 12)
Symbols: cartridge valves (for versions see ordering details)
Poppet valve without orifice
Version „E“
Poppet valve with orifice
Version „A“
Spool poppet valve without orifice
Version „D“
Spool poppet valve with orifice
Version „B“
Pressure fluid Mineral oil (HL, HLP) to DIN 51 524
1)
;
Fast bio-degradable pressure fluids to
VDMA 24 568 (also see RE 90 221); HETG (rape seed oil)
1)
;
HEPG (polyglycols)
2)
; HEES (synthetic ester)
2)
;
Other pressure fluids on request
Pressure fluid temperature range °C– 30 to + 80 for NBR seals
– 20 to + 80 for FKM seals
Viscosity range mm
2
/s 2.8 to 380
Cleanliness class to ISO code Maximum permissible degree of contamination of the pressure
fluid is to ISO 4406 (C) class 20/18/15
3)
2-way cartridge valve
Maximum operating pressure – Ports A and B bar 420
Maximum flow (recommended) NS 16 25 32 40 50 63 80 100
– Poppet valve cartridges „E“ and „A“ L/min 300 450 600 1000 1600 2500 4500 7000
– Spool valve cartridges „D“ and „B“ L/min 175 300 450 700 1400 1750 3200 4900
Technical data (for applications outside these parameters, please consult us!)
1)
Suitable for NBR and FKM seals
2)
Only suitable for FKM seals
3)
The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from
occurring and at the same time increases the component service life.
For the selection of filters see catalogue sheets RE 50 070, RE 50 076 and RE 50 081.
RE 21 050/02.03
RE 21 050/02.99 6/68 LC; LFA
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100
150 200
100
150
200
250
300
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100
150 200
100
150
200
250
300
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100
150 200
100
150
200
250
300
50 100 150 200 250
5
10
15
0
..DB40..
..DB20..
50 250
50
350
0 100
150 200
100
150
200
250
300
Characteristic curves: NS 16 (measured with HLP 46;
ϑ
oil -/
= 40 °C ± 5 °C)
The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure is
increased by the pressure being applied at port B.
Manual pressure adjustment, type LFA 16 DB… and type LFA 16 DBW…
Type LC 16 DB.E… (with poppet valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 16 DB.D… (with poppet spool valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Electrical proportional pressure adjustment, type LFA 16 DBE…
Type LC 16 DB.E… (with poppet valve)
Lowest settable pressure
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 16 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Lowest settable pressure
in bar →
1)
2)
1)
2)
RE 21 050/11.02
LC; LFA 7/68 RE 21 050/02.99
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 400150 250 35050
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 40050 150 250 350
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 400150 250 35050
100 400
5
10
15
0
..DB40..
..DB20..
100
50
350
0
100
150
200
250
300
200 300 200 300 40050 150 250 350
Characteristic curves: NS 25 (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure is
increased by the pressure being applied at port B.
Manual pressure adjustment, type LFA 25 DB… and type LFA 25 DBW…
Type LC 25 DB.E… (with poppet valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 25 DB.D… (with poppet spool valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Electrical proportional pressure adjustment, type LFA 25 DBE…
Type LC 25 DB.E… (with poppet valve)
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 25 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Lowest settable pressure
in bar →
Lowest settable pressure
in bar →
1)
2)
1)
2)
RE 21 050/11.02
RE 21 050/02.99 8/68 LC; LFA
50
350
0
100
150
200
250
300
600100 200 300 400 500
100 600
5
10
15
0
..DB40..
..DB20..
200 300 400 500
50
350
0
100
150
200
250
300
600100 200 300 400 500
100 600
5
10
15
0
..DB40..
..DB20..
200 300 400 500
100 600
5
10
15
0
..DB40..
..DB20..
50
350
0
100
150
200
250
300
600100200 300 400 500 200 300 400 500
100 600
5
10
15
0
..DB40..
..DB20..
50
350
0
100
150
200
250
300
600100200 300 400 500 200 300 400 500
Characteristic curves: NS 32 (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure is
increased by the pressure being applied at port B.
Manual pressure adjustment, type LFA 32 DB… and type LFA 32 DBW…
Type LC 32 DB.E… (with poppet valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min →
Flow in L/min →
Inlet pressure in bar →
Type LC 32 DB.D… (with poppet spool valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Electrical proportional pressure adjustment, type LFA 32 DBE…
Type LC 32 DB.E… (with poppet valve)
Lowest settable pressure
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 32 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Lowest settable pressure
in bar →
1)
2)
1)
2)
RE 21 050/11.02
LC; LFA 9/68 RE 21 050/02.99
15
20
10
5
0
200
400 600
800
1000
..DB40..
..DB20..
1000
800
600
400
200
200
250
350
300
150
100
50
0
15
20
10
5
0
200
400 600
800 1000
1000
800
600
400
200
200
250
350
300
150
100
50
0
..DB20..
..DB40..
15
20
10
5
0
200
400
600 800
1000
..DB20..
1000
800
600400
200
200
250
350
300
150
100
50
0
..DB40..
15
20
10
5
0
200
400
600 800
1000
..DB40..
..DB20..
1000
800
600
400
200
200
250
350
300
150
100
50
0
Characteristic curves: NS 40 (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure is
increased by the pressure being applied at port B.
Manual pressure adjustment, type LFA 40 DB… and type LFA 40 DBW…
Type LC 40 DB.E… (with poppet valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min →
Flow in L/min →
Inlet pressure in bar →
Type LC 40 DB.D… (with poppet spool valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Electrical proportional pressure adjustment, type LFA 40 DBE…
Type LC 40 DB.E… (with poppet valve)
Lowest settable pressure
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 40 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Lowest settable pressure
in bar →
1)
2)
1)
2)
RE 21 050/11.02
RE 21 050/02.99 10/68 LC; LFA
500
1000
1500
2000
15
20
10
5
0
..DB40..
25
30
..DB20..
200
250
350
300
150
100
50
0
500
1000
1500 2000
500
1000
1500 2000
15
20
10
5
0
..DB40..
..DB20..
30
500
1000
1500 2000
200
250
350
300
150
100
50
0
25
15
20
10
5
0
500
1000
1500
2000
25
30
500
1000
1500
2000
200
250
350
300
150
100
50
0
..DB20..
..DB40..
500
1000
1500 2000
200
250
350
300
150
100
50
0
2000
500
1000
1500
15
20
10
5
0
30
..DB20..
..DB40..
25
Characteristic curves: NS 50 (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure is
increased by the pressure being applied at port B.
Manual pressure adjustment, type LFA 50 DB… and type LFA 50 DBW…
Type LC 50 DB.E… (with poppet valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min →
Flow in L/min →
Inlet pressure in bar →
Type LC 50 DB.D… (with poppet spool valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Electrical proportional pressure adjustment, type LFA 50 DBE…
Type LC 50 DB.E… (with poppet valve)
Lowest settable pressure
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 50 DB.D… (with poppet spool valve)
Inlet pressurein bar →
Lowest settable pressure
in bar →
1)
2)
1)
2)
RE 21 050/11.02
Flow in L/min →
Flow in L/min →
LC; LFA 11/68 RE 21 050/02.99
500
1000
1500
2000
0
2500
15
20
10
5
..DB40..
..DB20..
30
200
250
350
300
150
100
50
500
1000
1500
2000
0
2500
25
500
1000
1500
2000
0
2500
500
1000
1500
2000
0
2500
..DB40..
200
250
350
300
150
100
50
15
20
10
5
30
..DB20..
25
0
2500
500
1000
1500
2000
0
2500
15
20
10
5
30
200
250
350
300
150
100
50
..DB20..
..DB40..
500
1000
1500
2000
25
2500
15
20
10
5
25
30
200
250
350
300
150
100
50
0
500
1000
1500
2000
0
2500
500
1000
1500
2000
..DB20..
..DB40..
Characteristic curves: NS 63 (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
The characteristic curves were measured with an external pilot oil drain at zero pressure. With an internal pilot oil drain the inlet pressure is
increased by the pressure being applied at port B.
Manual pressure adjustment, type LFA 63 DB… and type LFA 63 DBW…
Type LC 63 DB.E… (with poppet valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min →
Flow in L/min →
Inlet pressure in bar →
Type LC 63 DB.D… (with poppet spool valve)
Bypass pressure
1)
in bar →
Lowest settable pressure
2)
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Electrical proportional pressure adjustment, type LFA 63 DBE…
Type LC 63 DB.E… (with poppet valve)
Lowest settable pressure
in bar →
Flow in L/min → Flow in L/min →
Inlet pressure in bar →
Type LC 63 DB.D… (with poppet spool valve)
Flow in L/min → Flow in L/min →
INlet pressure in bar →
Lowest settable pressure
in bar →
1)
2)
1)
2)
RE 21 050/11.02
RE 21 050/02.99 12/68 LC; LFA
Seal kits for cartridge valves type LC...
Nominal size Material No.
NBR seals FKM seals
16 R900313104 R900313107
25 R900313105 R900313108
32 R900313106 R900313109
40 R900873022 R900873025
Nominal size Material No.
NBR seals FKM seals
50 R900873023 R900873026
63 R900873024 R900873027
80 R900314058 R900314067
100 R900314059 R900314068
Compression springs for cartridge valves type LC...
NS Spring dimensions Opening Material
in mm
pressure in bar
No.
10.2/1.3 x 40.5/8.0 2.0 R900062747
10.0/1.6 x 38.2/9.0 3.0 R900062753
16 9.8/1.7 x 38.0/9.0 4.0 R900062754
9.7/1.9 x 35.7/8.5 5.0 R900062757
9.2/2.4 x 60.5/14.5 8.0
1)
R900082073
15.3/2.25 x 55.0/8.0 2.0 R900062762
14.9/2.7 x 53.4/8.5 3.0 R900062764
25 14.7/2.8 x 53.5/8.5 4.0 R900062820
14.6/3.0 x 52.5/8.5 5.0 R900062819
14.1/3.5 x 78.5/12.0 8.0
1)
R900082072
19.6/2.8 x 69.5/7.5 2.0 R900062813
19.2/3.2 x 71.0/8.5 3.0 R900062783
32 19.1/3.4 x 72.0/9.5 4.0 R900062810
19.1/3.5 x 72.8/9.0 5.0 R900062805
18.5/4.0 x 109/14.5 8.0
1)
R900082071
NS Spring dimensions Opening Material
in mm
pressure in bar
No.
25.9/4.25 x 63.0/6.0 2.0 R900206675
40 25.7/4.5 x 68.5/6.0 4.0 R900206673
24.8/5.3 x 105.0/10.0 8.0
1)
R900206671
33.2/5.0 x 82.0/5.5 2.0 R900206684
50 32.8/5.3 x 92.0/6.5 4.0 R900206681
31.7/6.5 x 137.0/10.5 8.0
1)
R900206680
40.6/6.5 x 108.0/7.0 2.0 R900206690
63 40.7/6.5 x 127.5/7.5 4.0 R900206692
38.6/8.5 x 183.5/11.5 8.0
1)
R900206689
80 48.5/8 x 138/7.5 2.0 R900012353
49/8 x 152.5/7.5 4.0 R900024113
100 52.3/9.5 x 176/9.5 2.0 R900012385
52.3/9.5 x 195.5/9.5 4.0 R900024483
1)
These springs require an additional installation length.
When using standard control covers an additional sandwich
plate type LFA..D22... must be used.
Exception:
Control cover type “D“ can be replaced by type LFA..D8-../F (no
sandwich plate required).
RE 21 050/02.03
Preferred types (readily available)
Further preferred types and standard components
are shown in the EPS (standard price list).
Typ LC (Einbauventil) Material-Nummer
LC 16 DB40E7X/ R900912532
LC 16 DB40D7X/ R900912547
LC 40 DB40E7X/ R900927969
LC 40 DB40D7X/ R900938014
LC 50 DB40E7X/ R900938041
LC 50 DB40D7X/ R900938040
LC 63 DB40E7X/ R900938070
LC 63 DB40D7X/ R900938069
Typ LFA (Steuerdeckel) Material-Nummer
LFA 16 DB2-7X/315 R900912757
LFA 32 DB2-7X/315 R900912768
LFA 40 DB2-7X/315 R900927972
LFA 50 DB2-7X/315 R900938163
LFA 63 DB2-7X/315 R900938230
LFA 16 DBW2-7X/315 R900912805
LFA 25 DBW2-7X/315 R900912810
LFA 32 DBW2-7X/315 R900912815
LFA 40 DBW2-7X/315 R900938096
LFA 50 DBW2-7X/315 R900938191
LFA 63 DBW2-7X/315 R900938238
LC; LFA 13/68 RE 21 050/02.99
LFA A... B...
4
6
7
A...
B...
8
5
General notes on the ordering details for control covers
12 345 6 7 89
Nominal size Type
1)
Adjustment
Series Pressure stage in bar Seal Page
type for nominal sizes material
16 25 32 40 50 63 80 100 16 to 32 40 to 100
•••••• 7X
•• 6X
025 025
•••••• •• DB 050 050 18 to 20
100 100
200 200
•••••• •• DBW 315 315 21 to 25
420 400
025; 050;
••••• DBS 100; 200; 21 to 25
315; 400
025 025
050 050
•••••• •• DBU2A 100 100 29 to 32
•••••• •• DBU2B 200 200 29 to 32
315 315
420 400
•••••• DBE 38
025; 050; 025; 050;
•••••• •• DBEM 100; 200; 100; 200; 39 to 42
315; 420 315; 400
For ordering details, see pages giving details
of the individual cover variations
DB2
DB
max
DB1
Adjustment types for pressure relief valves
1 = Rotary knob
2 = Hexagon with protective cap
3 = Lockable rotary knob with scale
(H-key to automotive industry standards)
4 = Rotary knob with scale, not lockable
Series
7X = Series 70 to 79 and
6X = Series 60 to 69
(unchanged installation and connection dimensions)
Pressure stages
Dependent on the normianl size and permissible
working pressure of the pilot valve. For futher details
see ordering details for the control cover.
Pressure data for DB1, only required for types DBU2
and DBU3D
Pressure data for DB2, only required for type DBU3D
Ordering example for type DBU3D
…/315* A 100 B 200 (DB max /DB1/DB2)
*DB max. always first
1)
For functions, see selection table on page 15
•= Available
26 to 28
•••••• ••
DBWD
33 to 37
•••••• ••
DBU3D
The control covers are always fitted with a, optimised on our test rig,
standard orifice. Orifice details are therefore not required in the type
code. Deviating operating conditions could make it necessary to match
the orifice size. The orifices are of the threaded type.
Orifice as shown within the main symbo
l
Preferred types and standard components can
be found in the EPS (Standard Price List).
RE 21 050/11.02
RE 21 050/02.99 14/68 LC; LFA
1)
Suitable for NBR and FKM seals
2)
Only suitable for FKM seals
Pressure fluid Mineral oil (HL, HLP) to DIN 51 524
1)
;
Fast bio-degradable pressure fluids to
VDMA 24 568 (also see RE 90 221); HETG (rape seed oil)
1)
;
HEPG (polyglycols)
2)
; HEES (synthetic ester)
2)
;
Other pressure fluids on request
Pressure fluid temperature range °C– 30 to + 80 for NBR seals
– 20 to + 80 for FKM seals
Viscosity range mm
2
/s 2.8 to 380
Cleanliness class to ISO code Maximum permissible degree of contamination of the pressure
fluid is to ISO 4406 (C) class 20/18/15
3)
Technical data (for applications outside these parameters, please consult us!)
General notes on the ordering details for control covers: pilot control valve
(max. operating pressure)
1)
Possible pressure stages: 25, 50, 100, 200, 315, 420
2)
Possible pressure stages: 25, 50, 100, 200, 315, 400
3)
Possible pressure stages: 50, 100, 200, 315, 350
1 = G 1/4 threaded connection T; special poppet
Pilot control valve Control cover Max. operating pressure in bar
Y, T
Type Catalogue NS Type X For pressure
sheet No. control Static
DBD. 2 K2X/…
1)
On request 16 to 32 DB, DBW, DBWD, 420 315 •
DBD. 6 K1X/…
2)
25 402 40 to 63 DBU2., DBU3D, 400 315 •
DBD. 10 K1X/…
2)
25 402 80, 100 DBEM, DBS 400 315 •
.WE 6 … 23 178 16 to 63 DBW, DBWD, 350 210 (=); 160 (~) •
.WE 10 … 23 327 80, 100 DBU2., DBU3D 315 210 (=); 160 (~) •
M-3SEW 6 … 22 058 16 to 63 DBW, DBS 420 100 •
M-3SED 6 … 22 049 16 to 63 DBW, DBS 315 X-40 •
M-3SEW 10 … 22 075 80, 100 DBW, DBS 420 100 •
M-3SED 10 … 22 045 80, 100 DBW, DBS 315 X-40 •
DBET-5X/.G24-1
3)
29 165 16 to 32 DBE, DBEM 350 100 •
DBET-5X/.G24… 29 165 40 DBE, DBEM 350 100 •
DBET-5X/.YG24-1
3)
On request 50 to 100 DBE, DBEM 350 100 •
DBETR… On request 16 to 100 auf Anfrage
Included in
type code
Has to be
specially
ordered
Zero pressure (up to ≈ 2 bar)
Note:
By combining a 2-way cartridge valve with a pilot control valve, various
valve functions can be obtained.
The following components may be considered with porting pattern
form A6 (up to NS 63) and form A10 (NS 80 to 100) DIN 24 340.
Valve fixing screws are included within the control cover scope of
supply.
Fixing screws: S.H.C.S. to DIN 912-10.9
Pilot control valve Dimensions Tightening torque
Type in Nm
M-3SEW 6 … M5 x 45 8.9
M-3SEW 10 … M6 x 40 15.5
M-3SED 6 … M5 x 50 8.9
M-3SED 10 … M6 x 40 15.5
Pilot control valve Dimensions Tightening torque
Type in Nm
.WE 6 … M5 x 50 8.9
.WE 10 … M6 x 40 15.5
DBET … M5 x 30 8.9
Maximum operating pressure bar 420
Attention:
p
max
Take the pilot control valve into account!
3)
The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from
occurring and at the same time increases the component service life.
For the selection of filters see catalogue sheets RE 50 070, RE 50 076 and RE 50 081.
RE 21 050/11.02
LC; LFA 15/68 RE 21 050/02.99
= Availaable
BA
P
T
a
a
b
BA
P
T
a
b
0
ab
Pilot control valves (selection table)
Directional valve unloading
DBW
DBS
DBWD
DBU2A
DBU2B
DBU3D
3WE6B9-...
M-3SE.6C...
4WE6D...
M-3SE.6U...
3WE10B9-...
4WE10D...
M-3SE.6C...
M-3SE.6U...
M-3SE.10C./...
M-3SE.10U./...
3WE6B9-...
3WE10B9-...
3WE6A-...
4WE6M..
3WE10A...
4WE10M...
4WE6H...
4WE10H...
4WE6D...
4WE10D...
4WE6D...
4WE10D...
4WE6H...
4WE10H...
4WE6E...
4WE10E...
4WE6D...
4WE10D...
Open
DB function
Open
DB function
Open
DB function
Open
DB function
DB function
Closed
Isolating function
16
to
32
40
to
63
80
and
100
Nom. size
Type
Pilot
control
valve
Manual pressure setting
Symbols
(see
page 16)
Position"a" Position "b"
Without directional valve
DB function
Open
DB function
Open
DB function
Open
DB function
Open
Closed
DB function
Open
DB1 function
Open
Open
DB1 function
DB1 function
DBmax. function
Open
DBmax. function
DB1 function
Without max. pressure safety limitation
With max. pressure safety limitation
Proportional pressure setting
version
Open = Bypass circuit
Closed = Cartridge valve is hydraulically locked
DB function = Pressure relief function
Proportional
valves
3 pressure stages
2 spressure stages
DBmax. function
DB1 function
DB2 function
Position"a" Position"0" Position "b"
DBE
DBEM
DBET-5X/...
DBET-5X/...
With directional valve
1
DB
2
3
3
4
5
6
7
8
9
RE 21 050/11.02
RE 21 050/02.99 16/68 LC; LFA
F**
X
X
A
Y
B
X**
T
P
T
A
B
D**
F**
X
X
A
Y
Y
B
X**
P**
T
a
P
T
A
B
D**
F**
X
A
Y
Y
B
a
X
A**
P
T
A
F**
X
A
Y
B
X
P**
B
D**
Y
F**
X
A
Y
Y
B
X**
B**
P
T
A
B
a
X
F**
X
A
Y
B
D**
P**
P
T
A
B
a
DB max
DB 1
B
A
T
P**
F**
X
A
Y
B
D**
P**
P
T
A
B
a
DB max
DB 1
A
T
X**
DB 2
X
A
Y
B
D**
P**
X**
Y
X
X
A
Y
B
D**
P**
X**
Y
X
F**
P
T
Symbol overview (basic symbols), pressure relief function
Valid symbols are shown in the following type descriptions !
1 2 3
4 5 6
7 8 9
LFA..DB.-../..NS16 to 100
LFA..DBW.-../..NS16 to 32 LFA..DBW.-../..NS40 to 100
LFA..DBS.-../..NS40 to 100 LFA..DBWD.-../..NS16 to 100
LFA..DBU2A.-../..NS16 to 100
LFA..DBU3D.-../..NS16 to 100
LFA..DBE-../..NS16 to 63
LFA..DBEM-../..NS16 to 100
See pages 18 to 20 See pages 21, 22 See pages 21 to 25
See pages 21 to 25 See pages 26 to 28 See pages 29 to 32
See pages 33 to 37
See page 38 See pages 39 to 42
LC; LFA 17/68 RE 21 050/02.99
R-rings dimensions for ports X, Y (included within the scope of supply)
NS Dimensions Material No.
mm NBR FKM
16 8.41 x 1.40 x 1.78 R900025407 R900025408
25 9.81 x 1.50 x 1.78 R900017453 R900017610
32 11.18 x 1.60 x 1.78 R900017455 R900017611
40, 50 13.00 x 2.30 x 2.62 R900017457 R900017617
63 18.72 x 2.62 x 2.62 R900024445 R900024446
80 26.57 x 3.53 x 3.53 R900017466 R900017630
100 34.52 x 3.53 x 3.53 R900017472 R900017633
Seal kits for control cover type LFA..
Seal kit for LFA... Material No.
NS 16 NS 25 NS 32 NS 40
NBR FKM NBR FKM NBR FKM NBR FKM
..DB..; DBW..; ..DBS..
..DBWD..; ..DBEM.. R900313955 R900313956 R900313957 R900313958 R900313802 R900313803 R900313722 R900313723
..DBU2..; ..DBU3.. R900313709 R900313710 R900313711 R900313712 R900313713 R900313714 R900885152 R900313716
DBE.. R900313701 R900313702 R900313703 R900313704 R900313705 R900313706 R900313707 R900313708
Seal kit for LFA... Material No.
NS 50 NS 63 NS 80 NS 100
NBR FKM NBR FKM NBR FKM NBR FKM
..DB..; DBW..; ..DBS..
..DBWD..; R900895786 R900313725 R900313726 R900313727 R900310533 R900313054
..DBU2..; ..DBU3.. R900313717 R900313718 R900313719 R900313720 R900312090
..DBE.. R900313897 R900313898 R900313899 R900313700
..DBEM.. R900313893 R900313894 R900313895 R900313896 R900311930 R900312219
M8 x 1 tapered
M8 x 1 tapered (A**, B**, P**, D**) or G 1/4 (X**, F**)
M6 tapered
D orifices for type ..DBE.. NS 25 to 63
Orifices for NS 80, 100
Other built-in orifices
Orifice thread size
Fixing screws (included within the scope of supply)
S.H.C.S. to DIN 912-10.9
NS Qty. Dimensions Tightening torque in Nm
16 4 M 8 x 45 32
25 4 M 12 x 50 110
32 4 M 16 x 60 270
40 4 M 20 x 70 520
50 4 M 20 x 80 520
63 4 M 30 x 100 1800
80 8 M 24 x 120 900
100 8 M 30 x 120 1800
RE 21 050/11.02
RE 21 050/02.99 18/68 LC; LFA
F**
X
X
A
Y
B
X**
T
D**
Ø 32
3
8
2
9
1
42
52 max
9
4
3
DBD.2K.
L4
L2
4
G 1/4 /12
H2
H1
H3
D
X
F
Y
10
SW 22
SW 10
104
80 max
2
L1
L3
18
8
6; 7
1
10
5
H4
Ø35
Ø 40
0
Control cover with manual pressure adjustment
1 234569
NS 16 to 100
LFA DB
Nom. size 16
Nom. size 25
Nom. size 32
Nom. size 40
Nom. size 50
Nom. size 63
Nom. size 80
Nom. size 100
= 16
= 25
= 32
= 40
= 50
= 63
= 80
= 100
Series 7X
Series 6X
Adjustment type
Rotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standards)
Rotary knob with scale not lockable = 4
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
400 = 400 bar
Pressure stages
6X = Series 6X (NS 80 and 100)
7X = Series 7X (NS 16 to 63)
NS 16, 25 ,32
LFA..DB.-7X/..
NS 16, 25, 32
With NS 32
With NS 16, 25
Only with
version LFA 32 DB.
1 Port X optionally as threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
NS
X**
1)
F**
1)
D**
1)
H1
H2
H3
H4
L1
L2
L3
L4
16
0.8
1.0
40
17
15
19
65
80
36.5
32.5
25
0.8
1.0
40
19
24
19
85
85
49
45.5
32
1.2
0.8
50
26
28
26
100
100
56.5
53
** Orifice Ø
1)
Orifice M6 tapered
Dimensions in mm
22A/F
10A/F
LC; LFA 19/68 RE 21 050/02.99
SW6
124
SW19
SW30
SW32
10
94 max
204
D1/T1
H2
H1H3
Ø 35
H4
6; 75
8
DBD.6K..
4
94 max
72
4
D
X
F
Y
D1/T1
2
3
X
Y
L3
L4
L5
9
L1
L2
1
Ø 60
Ø 60
F**
X
X
A
Y
B
T
D**
Y
4
G1/2; 14
H2
H1H3
Ø 35
H4
DBD.6K..
D
X
F
Y
3
X
Y
90
90
9
L1
4
G1/2; 14
4
94 max
94 max
124 20
8
2
6; 7
Ø 60
Ø 60
5
72
1
SW6
SW19
SW30
SW32
10
LFA..DB.-7X/..
NS 40, 50, 63
Control cover with manual pressure adjustment
NS 40, 50
NS 63
1 Port X optionally as a threaded port
2 Port Y optionally as a threaded port
3 Locating pin
4 Adjustment "2"
5 Adjustment "1"
6 Adjustment "3"
7 Adjustment "4"
8 Space required to remove the key
9 Name plate
10 Locknut
NS
F**
1)
D**
1)
D1
H1
H2
H3
H4
L1
L2
L3
L4
L5
T1
40
1.2
1.0
G1/4
60
28
32
27
125
69
89
76
60
12
50
1.5
2.0
G1/2
68
19.5
34
35
140
80
105
84
70
14
63
2.0
2.5
82
30
50
45.5
180
** Orifice Ø
1)
Orifice M6 tapered
32A/F
30A/F
19A/F
6A/F
19A/F
32A/F
6A/F
30A/F
RE 21 050/02.99 20/68 LC; LFA
F**
X
X
A
Y
B
T
Y
X**
2,5
H2
H1H3
Ø 38
5
DBD.10K..
3
9
1
90 max
90 max
120
20
8
2
6; 7
4
68
2,5
L8
YFX
D2
YFX
H4
G1/2; 14
1
G1/2; 14
5
G1/2; 14
SW36
SW30
SW19
SW6
10
4
Ø 60
Ø 60
Control cover with manual pressure adjustment
NS 80, 100
LFA...DB.-6X/...
NS 80, 100
1 Port X optionally as a threaded port
2 Port Y optionally as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove the key
9 Name plate
10 Locknut
100
3.0
2.5
300
100
38
51
58
50
80
3.0
2.5
250
100
38
45
58
50
NS
X**
1)
F**
1)
D2
H1
H2
H3
H4
L8
** Orifice Ø
1)
Orifice G 1/4 tapered
Dimensions in mm
19A/F
30A/F
36A/F
6A/F
LC; LFA 21/68 RE 21 050/02.99
P
T
A
B
a
P
T
A
P
T
A
P
T
A
P
T
A
B
a
P
T
A
P
T
A
D**
F**
X
X
A
Y
P
Y
T
A
B
B
X**
P**
T
a
D**
F**
X
A
Y
P
Y
T
A
B
B
a
X
A**
F**
X
A
Y
P
T
A
B
X
P**
B
D**
Y
Control cover with manual pressure adjustment, for electrical unloading
1 234569
NS 16 to 100
LFA
NS 16
NS 25
NS 32
NS 40
NS 50
NS 63
Series
7X
= 16
= 25
= 32
= 40
= 50
= 63
NS 80
NS 100
Series
6X
= 80
= 100
Control cover type
For mounting a = DBW
directional spool (NS 16 to 100)
or directional poppet valve (for NS 16, 25, 32)
For mounting a directional poppet valve = DBS
(for NS 40, 50, 63, 80, 100)
Adjustment type
Rotary knobe = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standards)
Rotary knob with scale not lockable = 4
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
400 = 400 bar
Pressure stages
(take max. perm. pressure of pilot valve into account)
6X = Series 6X (NS 80 and 100)
7X = Series 7X (NS 16 to 63)
NS 16 to 63
LFA..DBW.-7X/...
NS 16, 25, 32
4WE 6 D../..
3WE 6 B9-../..
M-3SED 6 C../350…
M-3SEW 6 C../420…
M-3SED 6 U../350…
M-3SEW 6 U../420…
4WE 6 D../.. 3WE 6 B9-../..
M-3SED 6 U../350…
M-3SEW 6 U../420…
M-3SED 6 C../350…
M-3SEW 6 C../420…
LFA..DBS.-7X/...
NS 40, 50, 63
LFA..DBW.-7X/...
NS 40, 50, 63
RE 21 050/02.99 22/68 LC; LFA
8
5
6;7
18
104
80 max
Ø 32
Ø 40
3
21 980
SW 10
SW 22
42
52 max
40,5
L5
L6
G 1/4 /12
L2
4
32,5
L3
4
L1
2
X
P
A
T
B
Y
L4
Ø 35
10
4
2
3109
H3
H1
H2
G 1/4 /12
D
F
X
P
A
Y
H4
1
DBD.2K
11
A
Control cover with manual pressure adjustment, for electrical unloading
NS 16, 25, 32
Directional spool valve . WE 6...
Directional poppet valve
M-3SEW 6 ../…
Directional
poppet valve
M-3SED 6 U
Dimensions in mm
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are included
within the control cover scope
of supply
** Orifice Ø
1)
Orifice M6 tapered
U
C
NS P**
1)
X**
1)
F**
1)
D**
1)
H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 35 7 17
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 36 8 27
32 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 57 31 34.5
22A/F
10A/F
LC; LFA 23/68 RE 21 050/02.99
32,5
SW32
10
4
H2
H1H3
H4
6; 7
5
DBD.6K..
94 max
72
D
X
F
Y
3
X
Y
L5
L4
L7
2
L1
L3
A
A
BA
P
T
94 max
124 20
31
L3*
L6 40,5
9
11
4
1
SW30 SW19
SW6
H5
H2*
D
F
P
X
A
Ø 60
Ø 60
Ø 35
8
D1/T1
D1/T1
D1/T1
P
B
Control cover with manual pressure adjustment, for electrical unloading
NS 40, 50
Dimensions in mm
* Dimensions for control cover LFA..DBS..
** Orifice Ø
1)
Orifice M6 tapered
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type"1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
LFA..DBS.-../...
LFA..DBW.-7X/...
Directional
poppet valve
M-3SEW 6 ../…
U
C
Directional
poppet valve
M-3SED 6 U
Directional spool valve . WE 6 ...
NS A**
1)
P**
1)
F**
1)
D**
1)
D1 T1 H1 H2 H2* H3 H4 H5 L1 L3 L3* L4 L5 L6 L7
40 0.8 1.2 1.2 1.0 G1/4 12 60 46 17 32 27 40 125 62.5 69 76 68 43.5 47
50 0.8 1.5 1.5 2.0 G1/2 14 68 51 19.5 34 35 50 140 67.5 80 84 74.5 51 54.5
32A/F
30A/F
6A/F
19A/F
RE 21 050/02.99 24/68 LC; LFA
BA
P
T
4
G1/2; 14
55
8250
Ø 35
45
DBD.6K..
D
X
F
Y
3
XY
90
90
9
180
103
G1/2; 14
4
2
A
40,5
71
32,5
87 31
35
11
72
4
SW19
SW6
10
A
B
94 max
94 max
124 20
8
6; 7
5
SW30
SW32
Ø 60
Ø 60
1
P
F
D
Control cover with manual pressure adjustment, for electrical unloading
NS 63
Dimensions in mm
LFA..DBW.-7X/...
LFA..DBS.-.../...
Directional poppet valve
M-3SED 6 U
Directional poppet valve
M-3SEW 6 ../…
U
C
** Orifice Ø
1)
Orifice M6 tapered
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are included
within the control cover scope of
supply
Directional spool valve WE 6...
A**
1)
P**
1)
F**
1)
D**
1)
DBW 1.0 2.0 2.5
DBS 1.8 2.0 2.0
6A/F
19A/F
30A/F
32A/F
LC; LFA 25/68 RE 21 050/02.99
P
T
A
B
a
P
T
A
P
T
A
a
F**
X
A
Y
P
T
A
B
X
A**
Y
B**
B
a
BA
P
T
2,5
H2
H1H3
Ø 38
DBD.10K..
3 9
2
68
2,5
Y
F
X
D2
Y
F
X
H4
G1/2; 14
1
SW36
SW30
SW19
SW6
10
4
B A
L8
14
31
11
5
90 max
90 max
120 20
8
6; 75
Ø 60
Ø 60
X
G1/2; 14
A
F**
X
A
Y
P
T
A
B
X
P**
Y
X**
a
Control cover with manual pressure adjustment, for electrical unloading
NS 80, 100
4WE 10 D...
M-3SED 10 U../350…
M-3SEW 10 U../420…
M-3SED 10 C../350…
M-3SEW 10 C../420…
3WE 10 B9...
LFA..DBS.-6X/...
NS 80, 100
LFA..DBW.-6X/...
NS 80, 100
Directional poppet valve
M-3SED 10 U
Directional poppet valve
M-3SEW 10 ../…
U
C
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
80
1.2
3.0
3.5
3.0
2.5
250
100
30
45
52
75
100
1.5
3.0
3.5
3.0
2.5
300
100
30
51
52
85
NS
A**
1)
B**
1)
P**
1)
X**
2)
F**
2)
D2
H1
H2
H3
H4
L8
** Orifice Ø
1)
Orifice M8 x 1 tapered
2)
Orifice G 1/4 tapered
Directional spool valve WE 10...
6A/F
19A/F
30A/F
36A/F
RE 21 050/02.99 26/68 LC; LFA
P
T
A
B
a
P
T
A
B
a b
P
T
A
B
a
P
T
A
B
a b
F**
X
A
Y
Y
B
X**
B**
P
T
A
B
a
F**
X
A
Y
Y
B
X**
B**
P
T
A
B
a
X
F**
X
A
Y
Y
B
B**
P
T
A
B
a
X
D**
F**
X
A
Y
Y
B
X**
B**
P
T
A
B
a
X
Control cover with manual pressure adjustment, for isolation functions
123 4569
NS 16 to 100
LFA DBWD
NS 16
NS 25
NS 32
NS 40
NS 50
NS 63
Series
7X
= 16
= 25
= 32
= 40
= 50
= 63
NS 80
NS 100
Series
6X
= 80
= 100
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
400 = 400 bar
Pressure stages
(take max. perm. pressure of pilot valve into account)
Adjustment type
Rotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standard)
Rotary knob with scale not lockable = 4
Series 6X (NS 80 and 100) = 6X
Series 7X (NS 16 to 63) = 7X
3 WE 6 A../...
4 WE 6 M../...
3 WE 6 B9-../...
LFA..DBWD.-7X/...
NS 25, 32
LFA..DBWD.-7X/...
NS 16
LFA..DBWD.-6X/...
NS 80, 100
LFA..DBWD.-7X/...
NS 40, 50, 63
4 WE 10 M...
3 WE 6 B9-../... 3 WE 10 A... 3 WE 10 B9...
3 WE 6 B9-../...
LC; LFA 27/68 RE 21 050/02.99
Ø 32
3
8
2
901
42
52 max
9
4
3
DBD.2K.
4
G 1/4; 12
H2
H1
H3
X
F
Y
10
SW22
SW10
104
80 max
18
8
6; 7
1
Ø 40
10
5
H4
Ø35
L2
2
L1
L3
AB
P
T
YX
40,5L6
L5
32,5
4
G 1/4; 12
L4
31L7
B
A
H5
11
A
2
32,5
SW6
10
4
D1/T1
H2
H1H3
Ø 35
H4
DBD.6K..
72
D
X
F
Y
3
X
Y
L5
L4
L7
L1
L3
1
A
P
A
BA
P
T
31
L6 40,5
9
4
H5
B
SW19
SW30
SW32
4
D1/T1
2
11
5
Ø 60
94 max
6; 7
124 20
Ø 60
94 max
8
Control cover with manual pressure adjustment, for isolation functions
NS 16, 25, 32
Dimensions in mm
Directional spool valve . WE 6...
NS 40, 50
Directional spool valve . WE 6...
For dimension table see page 28
1 Port X optionally as a
threaded port
2 Port Y optionally as a
threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are included within
the control cover scope of supply
22A/F
10A/F
32A/F
30A/F
19A/F
6A/F
RE 21 050/02.99 28/68 LC; LFA
G1/2; 14
BA
P
T
4
G1/2; 14
H2
H1H3
Ø 35
H4
DBD.6K..
D
X
F
Y
3
XY
90
90
9
L1
103
1
4
2
A
40,5
71
32,5
87 31
35
72
4; 5…7
11
A
B
B
A
P
T
2,5
H2
H1H3
Ø 38
DBD.10K..
3
9
2
68
2,5
Y
F
X
D2
YX
H4
G1/2; 14
1
G1/2; 14
SW36
SW30
SW19
SW6
10
4
B
L8
14
41
11
90 max
5
90 max
120 20
8
6; 7
X
Ø 60
Ø 60
Control cover with manual pressure adjustment, for isolation functions
NS 63
Dimensions in mm
** Orifice Ø
1)
Orifice M6 tapered (NS 16...63) or M8 x 1 tapered (NS 80 and 100)
2)
Orifice M6 tapered
(NS 16...63) or
G 1/4 tapered (NS 80 and 100)
NS 16 25 32 40 50 63 80 100
B**
1)
1.0 1.0 1.0 1.2 1.5 1.8 3.5 3.5
X**
2)
0.8 0.8 1.0 3.0 3.0
F**
2)
1.0 1.0 1.2 1.2 1.5 2.0 2.5 2.5
D**
1)
1.0 2.0 2.5
D1 G 1/4 G 1/2
D2 250 300
H1 40 40 50 60 68 82 100 100
H2 19 26 46 50 55 67 67
H3 15 24 28 32 34 50 45 51
H4 19 19 26 27 35 45 58 58
H5 28 28 37 16 20
L1 65 85 100
L1 125 140 180
L2 80 85 100
L3 49 56.5 62.5 70
L4 32.5 45.5 53 76 84
L5 35 36 57 68 75
L6 7831 43.5 51
L7 17 27 34.5 47 54.5
L8 75 85
T1 12 14
NS 80, 100
Directional spool valve .WE 6...
Directional spool valve .WE 10...
1 Port X optionally as a
threaded port
2 Port Y optionally as a
threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws
are included within the
control cover scope of supply
6A/F
19A/F
30A/F
36A/F
LC; LFA 29/68 RE 21 050/02.99
P
T
A
B
a
b
P
T
A
B
a
b
P
T
A
B
a
b
F**
X
A
Y
B
D**
P**
P
T
A
B
a
DB max
DB 1
B
A
T
X**
Y
X
F**
X
A
Y
B
D**
P**
P
T
A
B
a
DB max
DB 1
A
A
T
X**
Y
X
F**
X
A
Y
Y
B
D**
P**
P
T
A
B
a
X
DB max
DB 1
B
B
A
T
F**
X
A
Y
Y
B
D**
P**
P
T
A
B
a
X
DB max
DB 1
A
B
A
T
F**
X
A
Y
Y
B
D**
P**
P
T
A
B
a
X
DB max
DB 1
B
B
A
T
F**
X
A
Y
Y
B
D**
P**
P
T
A
B
a
X
DB max
DB 1
A
B
A
T
Control cover with 2 manual pressure adjusters, electrically selectable
1 2345679
NS 16 to 100
DB1DB max.
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account
!
NS 16, 25 ,32
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
400 = 400 bar
Pressure stages
(take max. perm. pressure of pilot valve into account)
6X = Series 6X (NS 80 and 100)
7X = Series 7X (NS 16 to 63)
LFA A...
NS 16
NS 25
NS 32
NS 40
NS 50
NS 63
Series
7X
= 16
= 25
= 32
= 40
= 50
= 63
NS 80
NS 100
Series
6X
= 80
= 100
Adjustment type (details only required for DB1)
Rotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standards)
Rotary knob with scale not lockable = 4
Control cover type
De-energised - DB1 (4 WE.. D)
De-energised - open (4 WE.. H)
De-energised - DB max. (4 WE.. D) = DBU2B
(see symbols)
= DBU2A
LFA..DBU2A.-7X...
NS 16, 25, 32
LFA...DBU2B.-6X/...
NS 80, 100
LFA...DBU2A.-6X/...
NS 80, 100
LFA..DBU2B.-7X/...
NS 40, 50, 63
LFA..DBU2A.-7X/...
NS 40, 50, 63
LFA..DBU2B.-7X/...
NS 16, 25, 32
4 WE 10 D../...
4 WE 10 H../...
4 WE 6 H../...
4 WE 6 D../...
4 WE 6 H../...
4 WE 6 D../...
4 WE 10 D../...
4 WE 6 D../... 4 WE 6 D../...
RE 21 050/11.02
RE 21 050/02.99 30/68 LC; LFA
Ø 32
3
8
2
901
41
52 max
9
4
3
DBDS2K.
H4
L2
4
G 1/4 /12
H2
H1
H3
D
X
F
Y
12
SW 22
SW 10
104
80 max
2
L1
L3
18
8
6; 7
1
Ø 40
10 5
L4
Ø35
P
H5
AB
P
T
Y
X
10
40,5
L6
L5
45
4
A
2
G 1/4 /12
AB
DB1
13
4
DBD.2K.
4, 5…7
20
40
32,5
88
11
31
42
L7
11
DB max
*)
Control cover with 2 manual pressure adjusters, electrically selectable
NS 16, 25, 32
Directional spool valve 4 WE 6...
** Orifice Ø
1)
Orifice M6 tapered
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws M5 x 90 are included
within the scope of the control cover supply
12 Plug M6 tapered for ..DBU 2A..
13 Plug M6 tapered for ..DBU 2B..
*)
For DB max. only adjustment type "2" is possible
NS P**
1)
X**
1)
F**
1)
D**
1)
H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 35 7 17
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 36 8 27
32 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 57 31 34.5
22A/F
10A/F
LC; LFA 31/68 RE 21 050/02.99
32,5
SW6
10
4
D1/T1
H2
H1H3
Ø 35
H4
DBDS6K..
72
D
X
F
Y
3
X
Y
L5
L4
L7
L1
L3
11
A
P
B
A
BA
P
T
31
L6 40,5
9
4
H5
SW19
SW30
SW32
4
D1/T1
2
45
105
11
DBD.6K..
4, 5…7
1
40
12
13
DB1
DBmax*)
20
A
32,5
SW6
10
4
H2
H1H3
H4
D
X
F
Y
3
X
Y
90
90
87
L1
103
11
A
P
B
BA
P
T
31
71 40,5
9
SW19
SW30
SW32
45
105
11
DBD.6K..
4, 5…7
1
40
12
13
DB1
20
DBmax*)
4
G1/2; 14
2
G1/2; 14
35
4
Ø 35
5
6; 7
8
DBDS6K..
Ø 60
94 max
124 20
Ø 60
94 max
72
Control cover with 2 manual pressure adjusters, electrically selectable
NS 40, 50
NS 63
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws M5 x 90
are included within the control
cover scope
12 Plug M6 tapered for ..DBU 2A..
13 Plug M6 tapered for ..DBU 2B..
*) For DB max. only adjustment type "2" is possible
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
** Orifice Ø
1)
Orifice M6 tapered
Directional spool valve 4 WE 6...
Directional spool valve 4 WE 6...
NS P**
1)
F**
1)
D**
1)
D1 H1 H2 H3 H4 H5 L1 L3 L4 L5 L6 L7 T1
40 1.2 1.2 1.0 G1/4 60 17 32 27 40 125 69 76 68 43.5 47 12
50 1.5 1.5 2.0 G1/2 68 19.5 34 35 50 140 80 84 74.5 51 54.5 14
63 2.5 2.0 2.5 82 55 50 45 180
32A/F
30A/F
19A/F
6A/F
32A/F
30A/F
19A/F
6A/F
RE 21 050/02.99 32/68 LC; LFA
BA
P
T
2,5
H2
H1H3
DBDS10K..
3
2
2,5
YF
X
D2
Y
F
X
H4
G1/2; 14
1
G1/2; 14
4
A
46
14
31
11
6; 75
90 max
68
90 max
120 20
8
P
70
35
X
14
Ø 38
12
9
13
54
L8
70
*)
DBmax
DBD.10K..
4, 5…7
DB1
Ø 60
Ø 60
110
SW36
SW30
SW19
SW6
10
A
Control cover with 2 manual pressure adjusters, electrically selectable
NS 80, 100
Dimensions in mm
** Orifice Ø
1)
Orifice M8 x1 tapered
2)
Orifice G 1/4 tapered
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws
are included within the
control cover scope of supply
12 Plug
M8 x 1 tapered for ...DBU2A...
13 Plug
M8 x 1 tapered for ...DBU2B...
*) For DB max. only
adjustment type "2" is possible
Directional spool valve 4 WE 10...
NS P**
1)
X**
2)
F**
2)
D2 H1 H2 H3 H4 L8
80 3.5 3.0 2.5 250 100 30 45 52 75
100 3.5 3.0 2.5 300 100 30 51 52 85
6A/F
19A/F
30A/F
36A/F
LC; LFA 33/68 RE 21 050/02.99
P
T
A
B
a
b
P
T
A
B
a
b
P
T
A
B
a
b
P
T
A
B
a
b
P
T
A
B
a
b
P
T
A
B
a
b
F**
X
A
Y
B
D**
P**
P
T
A
B
a
DB max
DB 1
A
T
X**
DB 2
Y
X
P
T
A
B
a
DB 1
A
T
DB 2
F**
X
A
Y
Y
B
D**
P**
X
DB max
B
P
T
A
B
a
DB 1
DB 2
F**
X
A
Y
Y
B
D**
P**
X
DB max
B
A
T
Nom. size 16
Nom. size 25
Nom. size 32
Nom. size 40
Nom. size 50
Nom. size 63
Nom. size 80
Nom. size 100
= 16
= 25
= 32
= 40
= 50
= 63
= 80
= 100
Series 7X
Series 6X
Adjustment type (details only for DB1or DB2)*)
Rotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standards)
Rotary knob with scale not lockable = 4
Control cover with 3 manual manual pressure adjusters, electrically selectable
12 3 456789
NS 16 to 100
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
400 = 400 bar
Pressure stages
(take max. perm. pressure of pilot valve into account)
LFA DBU3D A... B...
DB2
DB1
DB
max
Series 6X (NS 80 and 100) = 6X
Series 7X (NS 16 to 63) = 7X
*) For DB1 and DB2 select the same adjustment type
4WE 6 H .. /...
4WE 6 E .. /...
4WE 6 D .. /...
4WE 10 H.. /...
4WE 10 E.. /...
4WE 10 D.. /...
LFA..DBU3D.-7X/...
NS 16, 25, 32
LFA..DBU3D.-7X/...
NS 40, 50, 63
LFA...DBU3D.-6X/...
NS 80, 100
4WE 6 H .. /...
4WE 6 E .. /...
4WE 6 D .. /...
RE 21 050/02.99 34/68 LC; LFA
Ø 32
3
8
2
901
41
52 max
9
4
3
DBDS2K...
H4
L2
4
G 1/4 /12
H2
H1
H3
D
X
F
Y
SW 22
SW 10
104
80 max
2
L1
L3
18
8
6; 7
1
Ø 40
10 5
L4
Ø35
P
H5
AB
P
T
Y
X
10
40,5L6
L5
45
4
A
2
G 1/4 /12
AB
DB1 *)
DB max **)
4
DBD.2K.
4, 5…7
100
32,5
88
11
31
42
L7
DBD.2K.
4, 5…7
DB2 *)
79
21
11
Control cover with 3 manual pressure adjusters, electrically selectable
NS 16, 25, 32
Dimensions in mm
** Orifice Ø
1)
Orifice M6 tapered
Directional spool valve 4 WE 6...
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
*) For DB1 and DB2
select the same adjustment type
**) For DB max. only adjustment
type "2" is possible
NS P**
1)
X**
1)
F**
1)
D**
1)
H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 35 7 17
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 36 8 27
32 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 57 31 34.5
22A/F
10A/F
LC; LFA 35/68 RE 21 050/02.99
4
D1/T1
H2
H1H3
Ø 35
H4
DBDS6K..
72
D
X
F
Y
3
11
A
P
B
A
4
H5
DBD.6K..
4; 5…7
1
110
DB2 *)
DBmax**)
DB1 *)
21
89
32,5
SW6
10
X
Y
L5
L4
L7
L1
L3
BA
P
T
31
L6 40,5
9
SW19
SW30
SW32
4
D1/T1
2
45
105
11
6; 75
94 max
94 max
124
20
8
Ø 60
Ø 60
Control cover with 3 manual pressure adjustmers, electrically selectable
NS 40, 50
Directional spool valve 4 WE 6...
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
*) For DB1 and DB2
select the same adjustment type
**) For DB max. only adjustment
type "2" is possible
** Orifice Ø
1)
Orifice M6 tapered
NS P**
1)
F**
1)
D**
1)
D1 H1 H2 H3 H4 H5 L1 L3 L4 L5 L6 L7 T1
40 1.2 1.2 1.0 G1/4 60 17 32 27 40 125 69 76 68 43.5 47 12
50 1.5 1.5 2.0 G1/2 68 19.5 34 35 50 140 80 84 74.5 51 54.5 14
32A/F
30A/F
19A/F
6A/F
RE 21 050/02.99 36/68 LC; LFA
32,5
SW6
10
4
G 1/2; 14
55
8250
Ø 35
45,
72
D
X
F
Y
3
X
Y
90
90
87
180
103
11
A
P
B
A
BA
P
T
31
71 40,5
SW19
SW30
SW32
45
105
11
DBD.6K..
4; 5…7
1
110
DB2 *)
94 max
94 max
124 20
DB1 *)
21
89
DBmax**)
G1/2; 14
4
2
DBD.6K..
4; 5…7
DBDS6K..
4
35
9
6; 75
8
Ø 60
Ø 60
Control cover with 3 manual pressure adjusters, electrically selectable
NS 63
Dimensions in mm
Directional spool valve 4 WE 6...
** Orifice Ø
1)
Orifice M6 tapered
NS
P**
1)
F**
1)
D**
1)
63
2.5
2.0
2.5
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
*) For DB1 and DB2
select the same adjustment type
**) For DB max. only adjustment type
"2" is possible
32A/F
30A/F
19A/F
6A/F
LC; LFA 37/68 RE 21 050/02.99
BA
P
T
2,5
H2
H1H3
DBDS10K..
3 2
2,5
YF
X
D2
Y
F
X
H4
G1/2; 14
1
G1/2; 14
4
BA
46
14
31
11
90 max
68
90 max
120 20
P
150
35
X
14
Ø 38
54
L8
70
DBmax **)
DBD.10K..
4, 5…7
115
9
DB2 *)
DB1 *)
SW6
SW19
SW30
SW36
110
10
5
Ø 60
6; 7 8
Ø 60
Control cover with 3 manual pressure adjusters, electrically selectable
NS 80, 100
Dimensions in mm
** Orifice Ø
1)
Orifice M8 x1 tapered
2)
Orifice G 1/4 tapered
1 Port X optionally
as athreaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
5 Adjustment type "1"
6 Adjustment type "3"
7 Adjustment type "4"
8 Space required to remove
the key
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
*) For DB1 and DB2
select the same adjustment type
**) For DB max. only
adjustment type "2" is possible
Dirrectional spool valve 4 WE 10...
NS P**
1)
X**
2)
F**
2)
D2 H1 H2 H3 H4 L8
80 3.5 3.0 2.5 250 100 30 45 52 75
100 3.5 3.0 2.5 300 100 30 51 52 85
6A/F
19A/F
30A/F
36A/F
RE 21 050/02.99 38/68 LC; LFA
–
32,5
4
D1/T1
H2
H1H3
D1/T1
H4
D
X
F
Y
3
X
Y
L4
L6
9
L1
L3
1
P
BA
P
T
31
L5 40,5
NG 40, 50, 63
4
11 14
9
NG 16, 25, 32
L2
2
2
X
A
Y
B
D**
P**
X**
Y
X
14
X
A
Y
B
D**
P**
F**
YX
14
X
A
Y
B
D**
B**
F**
Y
X
14
B1**
D1/T1
H2
H1H3
D1/T1
H4
D
X
F
Y
1
50
146
L5
39,5
15
Control cover for electrical-proportional pressure adjustment, without maximum pressure limitation
12 359
NS 16 to 63
LFA DBE 7X
NS 16
NS 25
NS 32
= 16
= 25
= 32
NS 40
NS 50
NS 63
= 40
= 50
= 63
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
Series 7X (NS 16 to 63) = 7X
For mounting a proportional pressure relief valve
without electrical feedback = DBE
LFA...DBE-7X/ NS 50, 63
LFA...DBE-7X/ NS 25, 32, 40
LFA...DBE-7X/ NS 16
NS 16 to 40 NS 50, 63
Zero
pressure
** Orifice Ø
1)
Orifice M6 tapered
2)
Orifice M6 tapered (NS 16), M8 x 1 tapered (NS 25 ... 63)
NS 16 25 32 40 50 63
B**
1)
0.8 0.8
P**
1)
1.0 1.0 1.0 1.5
X**
1)
0.8
F**
1)
0.8 1.0 1.2 1.5 2.0
D**
2)
0.8 0.8 0.8 1.0 2.0 2.5
D1 G1/4 G1/4 G1/4 G1/2 G1/2 G1/2
H1 40 40 50 60 68 82
H2 17 19 26 30 32 30
H3 15 24 28 32 34 50
H4 20 19 26 30 32 40
L1 65 85 100 125 140 180
L2 80 85 100 125 140 180
L3 36.5 49 56.5 72 80 100
L4 23.5 36 43,5 53 50 80
L5 7 23.5 31 43.5 51 71
L6 17 27 34.5 47 54.5 74.5
T1 12 12 12 14 14 14
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
9 Name plate
11 Valve fixing screws are
included within the control
cover scope of supply
14 Prop. pressure relief valve
type DBET-5X/...
(see summary on page 14,
also catalogue sheet
RE 29 165)
15 Pressure relief valve
NS 6 (included within the
scope of supply)
Not
NS 16
Only NS 16
Dimensions in mm
RE 21 050/11.02
NS 16, 25, 32
NS 40, 50, 63
LC; LFA 39/68 RE 21 050/02.99
X
A
Y
B
D**
P**
X**
Y
X
14
F**
P
T
14
X
A
Y
B
D**
P**
Y
X
F**
P
T
B**
B1**
14
X
A
Y
B
D**
Y
X
F**
P
T
P**
14
X
A
Y
B
X**
Y
X
F**
P
T
B**
T
TAP
D**
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
NS 16 to 100
Nom. size 16
Nom. size 25
Nom. size 32
Nom. size 40
Nom. size 50
Nom. size 63
Nom. size 80
Nom. size 100
= 16
= 25
= 32
= 40
= 50
= 63
= 80
= 100
Series 7X
Series 6X
12 3 569
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
NS 16, 25 ,32
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
420 = 420 bar
NS 40, 50, 63, 80, 100
025 = 25 bar
050 = 50 bar
100 = 100 bar
200 = 200 bar
315 = 315 bar
400 = 400 bar
Pressure stages
(take max. perm. pressure of pilot valve into account)
LFA DBEM
Series 6X (NS 80 to 100) = 6X
Series 7X (NS 16 to 63) = 7X
For mounting a proportional pressure relief valve
Without electrical feedback and
with maximum pressure safety = DBEM
LFA..DBEM-7X/...
NS 50, 63
LFA..DBEM-7X/...
NS 40
LFA..DBEM-7X/...
NS 16, 25, 32
LFA..DBEM-6X/...
NS 80, 100
Zero
pressure
Zero
pressure
For item nos. see page 40
RE 21 050/11.02
RE 21 050/02.99 40/68 LC; LFA
32,5
4
G1/4; 12
H2
H1H3
H4
D
X
F
Y
3
X
Y
L4
L6
L1
L3
1
P
BA
P
T
31
L5 40,5
11
14
9
L2
42
Ø 35
L7
2
G1/4; 12
H5
DBDS2K..
4
SW10
SW22
10
2
NS 16, 25, 32
Dimensions in mm
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
** Orifice Ø
1)
Orifice M6 tapered
Ports T and Y - zero pressure
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
9 Name plate
10 Locknut
11 Valve fixing screws are included
within the control cover scope of
supply
14 Proportional pressure relief valve
type DBET-5X/…–1
3)
(see summary on page 14, also
catalogue sheet RE 29 165)
3)
1 = G 1/4 threaded port T,
special poppet
NS P**
1)
X**
1)
F**
1)
D**
1)
H1 H2 H3 H4 H5 L1 L2 L3 L4 L5 L6 L7
16 1.0 0.8 1.0 0.8 40 17 15 19 28 65 80 36.5 32.5 7 17 35
25 1.0 0.8 1.0 0.8 40 19 24 19 28 85 85 49 45.5 8 27 36
32 1.0 1.0 1.2 1.0 50 26 28 26 37 100 100 56.5 53 31 34.5 57
22A/F
10A/F
LC; LFA 41/68 RE 21 050/02.99
32,5
4
G1/4; 12
H2
H1H3
H4
D
X
F
Y
3
X
Y
L4
L6
L1
L3
1
P
BA
P
T
31
L5 40,5
11 14
H5
L7
4
Ø 35
72
DBDS6K..
4
9
SW6
SW19
SW30
SW32
10
G1/4; 12
2
4
G1/2; 14
H2
H1H3
H4
D
X
F
Y
1
50
146
51
39,5
H5
72
DBDS6K..
4
3
G1/2; 14
2
15
NS 40
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
NS 50
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
14 Propportional pressure relief valve
type DBET-5X/…G24 (NS 40)
type DBET-5X/…Y G24-1
3)
(NS 50)
(see summary on page 14, also
catalogue sheet RE 29 165)
15 Pressure relief valve NS 6
(is included within the scope of supply)
3)
1 = G 1/4 threaded port T,
special poppet
** Orifice Ø
1)
Orifice M6 tapered
NS B**
1)
P**
1)
F**
1)
D**
1)
H1 H2 H3 H4 H5 L1 L3 L4 L5 L6 L7
40 1.5 1.2 1.0 60 20 32 27 40 125 69 76 43.5 47 68
50 0.8 1.5 2.0 68 19.5 34 35 50 140 80 84 51 54.5 74.5
30A/F
32A/F
6A/F
19A/F
RE 21 050/02.99 42/68 LC; LFA
2,5
H2
H1H3
40,5
DBDS10K..
3 9 2
2,5
YFX
D2
Y
X
H4
G1/2; 14
1
G1/2; 14
4
B
46
14
31
15
X
P
D
T
A
B
P
70
54 35
L8
80 6
31
16,5
14
95,5
115 35
14
32,5
4
G 1/2; 14
H2
H1H3
H4
D
X
F
Y
3
X
Y
90
90
87
L1
103
11
BA
P
T
71 40,5
1
4
DBDS6K..
4
35
G1/2; 14
2
9
50
72
15
SW6
SW19
SW30
SW32
10
71
146
39,5
Ø 35
31
NS 63
Dimensions in mm
Control cover for electrical-proportional pressure adjustment, with maximum pressure limitation
NS 80, 100
** Orifice Ø
1)
Orifice M6 tapered (NS 63) orifice M8 x 1 tapered (NS 80, 100)
2)
Orifice M6 tapered (NS 63) orifice G 1/4 tapered (NS 80, 100)
1 Port X optionally
as a threaded port
2 Port Y optionally
as a threaded port
3 Locating pin
4 Adjustment type "2"
9 Name plate
10 Locknut
11 Valve fixing screws are
included within the control
cover scope of supply
14 Proportional pressure relief valve
type DBET-5X/…Y G24-1
3)
(see summary on page 14, also
catalogue sheet Re 29 165)
15 Pressure relief valve NS 6
(is included within the scope of supply)
3)
1 = G 1/4 threaded port T,
special poppet
NS B**
1)
P**
1)
X**
2)
F**
2)
D**
1)
H1 H2 H3 H4 D2 L1 L8
63 0.8 2.0 2.5 82 55 50 45 180
80 0.8 1.0 3.0 2.5 100 30 45 52 250 75
100 0.8 1.0 3.5 3.0 100 30 51 52 300 85
6A/F
19A/F
30A/F
32A/F
LC; LFA 43/68 RE 21 050/02.99
B
A
B
A
X
Y
X**
F**
Maximum operating pressure – Ports A and B bar 315
Maximum flow
(recommended)
NS 16 25 32 40 50 63
– LC..DR20.../.. L/min 100 200 300 750 1000 1600
– LC..DR40.../.. L/min 150 300 450 1000 1300 2000
Pressure fluid Mineral oil (HL, HLP) to DIN 51 524
1)
;
Fast bio-degradable pressure fluids to
VDMA 24 568 (also see RE 90 221); HETG (rape seed oil)
1)
;
HEPG (polyglycols)
2)
; HEES (synthetic ester)
2)
;
other pressure fluids on request
Pressure fluid temperature range °C– 30 to + 80 for NBR seals
– 20 to + 80 for FKM seals
Viscosity range mm
2
/s 2.8 to 380
Cleanliness class to ISO code Maximum permissible degree of contamination of the pressure
fluid is to ISO 4406 (C) class 20/18/15
3)
Preferably use 5 and 8 bar springs for flow control. The usable ∆
p
is available on request.
Pressure reducing function
Ordering details: pressure reducing cartridge valve (without associated control cover LFA..DB..)
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
7X = (NS 16 to 63) Series 70 to 79
(70 to 79: unchanged installation and connection dimensions)
E = Spool without fine control grooves
Nominal size 16 = 16
Nominal size 25 = 25
Nominal size 32 = 32
Nominal size 40 = 40
Nominal size 50 = 50
Nominal size 63 = 63
Closing pressure approx. 0 bar (without spring) = 00
Closing pressure approx. 2 bar = 20
Closing pressure approx. 3 bar = 30
1)
Closing pressure approx. 4 bar (standard spring) = 40
Closing pressure approx. 5 bar = 50
2)
Closing pressure approx. 8 bar = 80
3)
LC DR E 7X
Preferred types and standard components can
be found in the EPS (Standard Price List).
1)
Closing pressure 3.0 bar only for NS 16 for mounting a pilot
operated pressure relief valve type DBC . -5X/…SO187 (see
catalogue sheet RE 25 802)
2)
Only for NS 16, 25 and 32
3)
Special installation space is required (see page 47)
Symbol: cartridge valves
Technical data (for applications outside these parameters, please consult us!)
Pressure reducing function
Normally open
Attention!
2-way cartridge valves type LC..DR... are
combined with control covers type LFA..DB...
(for ordering details see page 13).
Type LC..DR..
E.g.
Type LFA...DB...
Type LC..DR 40...
3)
The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from
occurring and at the same time increases the component service life.
For the selection of filters see catalogue sheets RE 50 070, RE 50 076 and RE 50 081.
RE 21 050/11.02
1)
Suitable for NBR and FKM seals
2)
Only suitable for FKM seals
RE 21 050/02.99 44/68 LC; LFA
25 1750 50 75 100 125 150
5
10
15
8 bar
4 bar
2 bar
25 175
50
300
0
100
150
200
250
50 75 100 125 150
50 300
50
300
0 100
150 200 250
100
150
200
250
25 175
1,25
0
0,25
0,5
0,75
1,0
50
75 100 125 150
8 bar
4 bar
2 bar
50
300
0
100
150
200
250
100 200 300 400
50 300
50
300
0 100
150 200 250
100
150
200
250
0 100 200 300 400
5
10
15
8 bar
4 bar
2 bar
1,6
0
0,4
0,8
1,2
100 200 300 400
1,4
0,2
0,6
1,0
8 bar
4 bar
2 bar
Characteristic curves (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
LC 16 DR...
LC 25 DR...
Outlet pressure in bar →
Flow in L/min →
Flow in L/min →
Outlet pressure in bar →
Pressure differential in bar →
Lowest settable pressure in bar
Inlet pressure in bar →
Flow in L/min →
Pilot oil flow in L/min →
Outlet pressure in bar →
Flow in L/min →
Flow in L/min →
Outlet pressure in bar →
Pressure differential in bar →
Lowest settable pressure in bar
Inlet pressure in bar →
Flow in L/min →
Pilot oil flow in L/min →
Measured at: p
a
= 50 bar
Measured at: p
a
= 50 bar
RE 21 050/11.02
LC; LFA 45/68 RE 21 050/02.99
600
50
300
0
100
150
200
250
100
200 300 400 500
50 300
50
300
0 100
150 200 250
100
150
200
250
15
0
5
10
600100 200 300 400 500
8 bar
4 bar
2 bar
1,6
0
0,4
0,8
1,2
600100 200 300 400 500
1,4
0,2
0,6
1,0
8 bar
4 bar
2 bar
50 300
50
300
0 100
150 200 250
100
150
200
250
1000
50
300
0
100
150
250
200
400 600 800
200
15
0
5
10
1000
200
400 600 800
8 bar
4 bar
2 bar
1,2
0
0,4
0,8
0,2
0,6
1,0
1000
200
400 600 800
8 bar
4 bar2 bar
Characteristic curves (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
LC 32 DR...
LC 40 DR...
Outlet pressure in bar →
Flow in L/min →
Flow in L/min →
Outlet pressure in bar →
Pressure differential in bar →
Lowest settable pressure in bar
Inlet pressure in bar →
Flow in L/min →
Pilot oil flow in L/min →
Outlet pressure in bar →
Flow in L/min →
Flow in L/min →
Outlet pressure in bar →
Pressure differential in bar →
Lowest settable pressure in bar
Inlet pressure in bar →
Flow in L/min →
Pilot oil flow in L/min →
Measured at: p
a
= 50 bar
Version 20
Measured at: p
a
= 50 bar
RE 21 050/11.02
RE 21 050/02.99 46/68 LC; LFA
50 300
50
300
0 100
150 200 250
100
150
200
250
50 300
50
300
0 100
150 200 250
100
150
200
250
1500
50
300
0
100
150
250
250
500 750
1000
200
1250
24
0
8
16
1500
250
500 750
1000
8 bar
4 bar
2 bar
4
12
20
1250
2000
50
300
0
100
150
250
400
800
1200
1600
200
24
0
8
16
2000
400
800
1200
1600
8 bar
4 bar
2 bar
4
12
20
24
0
8
16
4
12
20
2000
400
800
1200
1600
8 bar
4 bar
2 bar
Characteristic curves (measured with HLP 46;
ϑ
oil
= 40 °C ± 5 °C)
LC 50 DR...
LC 63 DR...
Outlet pressure in bar →
Flow in L/min →
Flow in L/min →
Outlet pressure in bar →
Pressure differential in bar →
Lowest settable pressure in bar
Inlet pressure in bar →
Flow in L/min →
Pilot oil flow in L/min →
Outlet pressure in bar →
Flow in L/min →
Flow in L/min →
Outlet pressure in bar →
Pressure differential in bar →
Lowest settable pressure in bar
Inlet pressure in bar →
Flow in L/min →
Pilot oil flow in L/min →
Version 20
Version 40
Version 20
Measured at: p
a
= 50 bar
p
e
= 100 bar
p
e
= 350 bar
Measured at: p
a
= 50 bar
p
e
= 100 bar
p
e
= 350 bar
RE 21 050/11.02
12
0
4
8
2
6
10
1500
250
500 750
1000
8 bar
4 bar
2 bar
1250
LC; LFA 47/68 RE 21 050/02.99
Seal kits for cartridge valves type LC...
Nom. size Material No.
NBR seals FKM seals
16 R900313104 R900313107
25 R900313105 R900313108
32 R900313106 R900313109
Nom. size Material No.
NBR seals FKM seals
40 R900873022 R900873025
50 R900873023 R900873026
63 R900873024 R900873027
Compression springs for cartridge valves type LC...
NS Spring dimensions Opening Material
in mm
pressure in bar
No.
10.2/1.3 x 40.5/8.0 2.0 R900062747
10.0/1.6 x 38.2/9.0 3.0 R900062753
16 9.8/1.7 x 38.0/9.0 4.0 R900062754
9.7/1.9 x 35.7/8.5 5.0 R900062757
9.2/2.4 x 60.5/14.5 8.0
1)
R900082073
15.3/2.25 x 55.0/8.0 2.0 R900062762
14.9/2.7 x 53.4/8.5 3.0 R900062764
25 14.7/2.8 x 53.5/8.5 4.0 R900062820
14.6/3.0 x 52.5/8.5 5.0 R900062819
14.1/3.5 x 78.5/12.0 8.0
1)
R900082072
19.6/2.8 x 69.5/7.5 2.0 R900062813
19.2/3.2 x 71.0/8.5 3.0 R900062783
32 19.1/3.4 x 72.0/9.5 4.0 R900062810
19.1/3.5 x 72.8/9.0 5.0 R900062805
18.5/4.0 x 109/14.5 8.0
1)
R900082071
NS Spring dimensions Opening Material
in mm
pressure in bar
No.
25.9/4.25 x 63/6 2.0 R900206675
40 25.7/4.5 x 68.5/6 4.0 R900206673
24.8/5.3 x 105/10 8.0
1)
R900206671
33.2/5 x 82/5.5 2.0 R900206684
50 32.8/5.3 x 92/6.5 4.0 R900206681
31.7/6.5 x 137/10.5 8.0
1)
R900206680
40.6/6.5 x 108/7 2.0 R900206690
63 40.7/6.5 x 127.5/7.5 4.0 R900206692
38.6/8.5 x 183.5/11.5 8.0
1)
R900206689
1)
These springs require an additional installation length.
When using standaard control covers an additional sandwich
plate type LFA . D22… must be used.
Exception:
Control cover type "D" can be replaced by type LFA . D8-../F
(no sandwich plate is required).
RE 21 050/11.02
RE 21 050/02.99 48/68 LC; LFA
X
Y
X**
F**
M
A
B
Z2
5
4
Control cover for pressure reducing function
12 34 5 6 7
Nominal size Type
Adjustment
Series Pressure stage in bar Seal Page
type for nominal size material
16 25 32 40 50 63 ...DR...
..DRW. ..DRE..
••• • •• DR 025 53, 54
••• • •• DRW 075 55, 56
•• • •• DREV 150 006 57, 58
•• • •• DREZ 210 014 57, 58
•• • ••DREWV 315 006 59, 60
•• • ••DREWZ 350 014 59, 60
For ordering details see
pages for the individual
control cover variants
Adjustment elements for pressure reducing valves
1 = Rotary knob
2 = Hexagon with protective cap
3 = Rotary knob with scale
(H-key to automotive industry standards)
4 = Rotary knob with scale
Series
7X = Series 70 to 79
(unchanged installation and connection dimensions)
Main spool normally closed - LC..DB 40 D.. – separate order
LFA 7X
•= Available
General notes
Pressure reducing function
Normally closed
Attention !
Control covers type LFA..DR... are combined
with 2-way cartridge valves type LC..DB 40 D...
(for ordering details see page 5)
E.g.
Type LFA...DR...
Type LC..DB 40 D..
Preferred types and standard components can
be found in the EPS (Standard Price List).
LC; LFA 49/68 RE 21 050/02.99
Control cover for pressure reducing function
Main spool normally closed - LC..DB 40 D.. – separate order
Technical data (for applications outside these parameters, please consult us!)
Control cover
Notes on pilot control valves (not included within the scope of supply, must be ordered separately!)
Pressure fluid Mineral oil (HL, HLP) to DIN 51 524
1)
;
Fast bio-degradable pressure fluids to
1)
Suitable for NBR and FKM seals VDMA 24 568 (also see RE 90 221); HETG (rape seed oil)
1)
;
2)
Only suitable for FKM seals HEPG (polyglycols)
2)
; HEES (snthetic ester)
2)
;
Other pressure fluids on request
Pressure fluid temperature range °C– 30 to + 80 for NBR seals
– 20 to + 80 for FKM seals
Viscosity range mm
2
/s 2.8 to 380
Cleanliness class to ISO code Maximum permissible degree of contamination of the pressure
fluid is to ISO 4406 (C) class 20/18/15
3)
Max. perm. operating pressure at port ... Control cover type
LFA..DR.-../...
LFA..DRW.-../... LFA..DRE..-../...
...X (primary pressure) 315 bar 350 bar
...Y (secondary pressure = max. settable pressure) 315 bar 350 bar
When regulating the pressure Zero pressure (up to ≈ 2 bar)
Static 60 bar 315 bar
When regulating the pressure Zero pressure (up to ≈ 2 bar)
Static 100 bar
(corresponds to the permissible
tank pressure of the pilot valves)
...Z2
...T
Directional spool valve (porting pattern form A 6 to DIN 24 340)
Proportional pressure relief valve
Valve fixing screws are included within the control cover scope of supply.
4)
Possible pressure stages 50, 100, 200, 315, 350
Directional spool valve Nominal size Catalogue sheet No. Control cover
3WE 6 A-../... 6 23 178 DREWV, DREWZ
3WE 6 B9-../... 6 23 178 DRW
Prop. pressure relief valve Nominal size Catalogue sheet No. Control cover
DBET-5X/...
4)
Y G24-1 6 29 165 DREV, DREWV
DBETR-1X/... On request On request DREZ, DREWZ
3)
The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from
occurring and at the same time increases the component service life.
For the selection of filters see catalogue sheets RE 50 070, RE 50 076 and RE 50 081.
RE 21 050/11.02
RE 21 050/02.99 50/68 LC; LFA
D**
F**
X
X
A
B
Z2
Y
M
D**
F**
X
X
A
B
Z2
Y
T
P
PT A
D**
F**
X
X
A
B
Z2
Y
T
P
PT A
B
Z1
Z1
T
D**
F**
X
X
A
B
Z2
Y
T
P
PT A
T
A
B
a
T
D**
F**
X
X
A
B
Z2
Y
T
P
PT A
B
Z1
Z1
T
A
B
a
T
D**
F**
X
X
A
B
Z2
Y
P
T
A
B
a
M
Overview of symbols (basic symbols) - pressure reducing function
Valid symbols are shown in the following type descriptions !
The orifices built into the control covers are threaded type orifices.
These are standard orifices. No type is entered in the ordering detail.
Orifice as shown
within the main
symbol
LFA..DREWV-.../...
NS 25 to 63
Control cover for
electrical-proportional
pressure adjustment and
isolating function
Port T - zero pressure
See pages 59; 60
LFA..DREWZ-.../...
NS 25 to 63
Control cover for
electrical-proportional
pressure adjustment and
isolating function
Port T - zero pressure
See pages 59; 60
LFA..DREV-.../...
NS 25 to 63
Control cover for
electrical-proportional
pressure adjustment
Port T - zero pressure
See pages 57; 58
LFA..DREZ-.../...
NS 25 to 63
Control cover for
electrical-proportional
pressure adjustment
Port T - zero pressure
See pages 57; 58
LFA..DR.-.../...
NS 16 to 63
Control cover with
manual pressure
adjustment
Port T - zero pressure
See pages 53; 54
LFA..DRW.-.../...
NS 16 to 63
Control cover with
manual pressure
adjustment and isolating
function
Port T - zero pressure
3WE 6 B9-../..
Solenoid de-energised →
closed
Solenoid energised →
pressure reducing function
See pages 55; 56
3WE 6 A-../..
Solenoid de-energised →
closed
Solenoid energised →
pressure reducing function
3WE 6 A-../..
Solenoid de-energised →
closed
Solenoid energised →
pressure reducing function
RE 21 050/11.02
LC; LFA 51/68 RE 21 050/02.99
R-rings dimensions for ports X, Y, Z1, Z2 (are included within the scope of supply)
NS Dimensions Material No.
in mm NBR FKM
16 8.41 x 1.40 x 1.78 R900025407 R900025408
25 9.81 x 1.50 x 1.78 R900017453 R900017610
32 11.18 x 1.60 x 1.78 R900017455 R900017611
40, 50 13.00 x 2.30 x 2.62 R900017457 R900017617
63 18.72 x 2.62 x 2.62 R900024445 R900024446
80 26.57 x 3.53 x 3.53 R900017466 R900017630
100 34.52 x 3.53 x 3.53 R900017472 R900017633
Seal kits for control cover type LFA../.. (NS 16 to 63)
Fixing screws (are included within the scope of supply)
S.H.C.S. to DIN 912-10.9
NS Qty. Dimensions Tightening torque in Nm
16 4 M 8 x 45 32
25 4 M 12 x 50 110
32 4 M 16 x 60 270
40 4 M 20 x 70 520
50 4 M 20 x 80 520
63 4 M 30 x 100 1800
1)
The seals for the pilot valves (DR6..., ZDR...) are not included within the scope of supply.
2)
For pilot valve seal kits see the relevant catalogue sheet.
Seal kit for LFA... Material No.
NS 16 NS 25 NS 32
NBR FKM NBR FKM NBR FKM
Pilot control ..DR6.. R900311273 R900311276 R900311273 R900311276 R900311273 R900311276
R900313701 R900313702 R900313703 R900313704 R900313705 R900313706
Pilot control ..ZDR6.. R900314298 R900314299 R900314298 R900314299 R900314298 R900314299
R900313885 R900313886 R900313887 R900313888
Control ..DR..
cover LFA..DRW..
DREV..; ..DREWV..
..DREZ..; ..DREWZ..
..DR..
1)
.
.DRW..
1)
Seal kit for LFA... Material No.
NS 40 NS 50 NS 63
NBR FKM NBR FKM NBR FKM
Pilot control ..DR6.. R900311273 R900311276 R900311273 R900311276 R900311273 R900311276
R900313889 R900313890 R900313889 R900313890 R900313891 R900313892
Pilot control ..ZDR6.. R900314298 R900314299 R900314298 R900314299 R900314298 R900314299
R900313881 R900313882 R900313881 R900313882 R900313883 R900313884
Control ..DR..
cover LFA..DRW..
DREV..; ..DREWV..
2)
..DREZ..; ..DREWZ..
2)
..DR..
1)
.
.DRW..
1)
RE 21 050/11.02
RE 21 050/02.99 52/68 LC; LFA
H2
H1H3
D
X
F
Y
4
X
Y
L7
L1
L3
1
BA
P
T
L6 40,5
9.2
L2
3.1
G1/4; 12
Z1
Z2
G1/4; 12
4
4
2
9.1
32,5
Y
H2
H1H3
D
X
F
4
X
Y
L7
L1
L3
9.3
BA
P
T
32,5
L6 40,5
L2
3.1
G1/4; 12
Z1
Z2
4
3.2
G1/2; 14
4
1
G1/2; 14
L4
G1/2; 14
2
H4
H5
4
L5
4
9.3
F
Z2
10
Y
47,5
8250
D
X
F
4
X
Y
81
11
B
A
P
T
75 40,5
3.1
G1/4; 12
Z1
Z2
35
4
32
10
A
65
180
94
9.3
D
F
32,5
122
3.2
G3/4; 16
Z2
NS 16, 25, 32
Control covers for versions DR, DRW, DREV, DREZ, DREWV and DREWZ
NS 40, 50
NS 63
NS 16 25 32 40 50
H1 40 40 50 60 68
H2 17 19 26 30 32
H3 15 24 28 32 34
H4 40 32
H5 40 32
L1 65 85 100 125 140
L2 80 85 100 125 140
L3 36.5 49 56.5 72 80
L4 62.5 70
L5 62.5 70
L6 7 23.5 31 43.5 51
L7 49 59 66.5 79 86.5
1 Port X optionally as a threaded port
(for NS 16...50)
2 Port Y optionally as a threaded port
(for NS 40, 50)
3.1 Port Z1 optionally as threaded port
(for LFA..DREZ.. , LFA..DREWZ..., NS 25..63)
3.2 Port Z2 optionally as threaded port
(for NS 40, 50, 63)
4 Locating pin
9.1 Name plate (NS 16)
9.2 Name plate (NS 25, 32)
9.3 Name plate (NS 40, 50, 63)
10 Check valve (for NS 63 orifice F in poppet)
11 For control cover NS 63
Logic element NS 16
LC; LFA 53/68 RE 21 050/02.99
X
A
D**
X**
Y
Z2
B
M
X
ATP
D**
X
F**
A
Y
Z2
B
M
X
ATP
D**
F**
Z2
Y
X
A
Y
Z2
B
M
X
ATP
D**
F**
Z2
A**
A
Y
Z2
B
M
X
ATP
Control cover for pressure reducing functions
Main spool normally closed - LC..DB 40 D.. – separate order
NS 16 to 63
Nominal size 16 =16
Nominal size 25 =25
Nominal size 32 =32
Nominal size 40 =40
Nominal size 50 =50
Nominal size 63 =63
1234567
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
LFA DR 7X
LFA..DR.-7X/...
NS 40, 50
LFA..DR.-7X/...
NS 25, 32
LFA..DR.-7X/...
NS 16
LFA..DR.-7X/...
NS 63
025 = Max. secondary pressure 25 bar
075 = Max. secondary pressure 75 bar
150 = Max. secondary pressure 150 bar
210 = Max. secondary pressure 210 bar
315 = Max. secondary pressure 315 bar
7X = Series 7X (NS 16 to 63)
1
) H-key to Material No. R900008158 is included within the scope of supply
Adjustment type
Rotary knob =1
Set screw with hexagon and protective cap =2
Lockable rotary knob with scale =3
1)
Rotary knob with scale =4
RE 21 050/11.02
RE 21 050/02.99 54/68 LC; LFA
A
T
P
B
Z2
X
Y
32
345
21
1
L9
Ø 40
L10
18
50
L11
L12
Ø 35
Ø 39
L8
135.25.18
12
14
16
45
11
6
15 7
9
Control cover for pressure reducing functions
Main spool normally closed - LC..DB 40 D.. – separate order
NS 16 to 63
Dimensions in mm
5.1 Adjustment element "4"
5.2 Adjustment element "3"
6 Adjustment element "2"
7 Adjustment element "1"
8 Direct operated pressure reducing valve
(is included within the scope of supply)
9 Name plate for pressure reducing valves
11 Valve fixing screws
M5x50 DIN 912-10.9
M
A
= 8.9 Nm
are included within the control cover
scope of supply
12 Pressure gauge port G 1/4, 12 deep;
Socket screw 6A/F
13 Space required to remove the key
14 Control cover, see page 52
15 Locknut 24A/F
16 For type .../315 → 50 mm
NS 16 25 32 40 50 63
A**
1)
2.0
F**
1)
0.8 1.0 1.2 1.5 1.5
X**
1)
2.5
0.8 3.0 3.0 3.0 3.0 3.0
.../315 0.8 1.8 1.8 1.8 1.8 1.8
22 5.5
.../315 30.5 14 6
119.5 131 123.5 111 103.5 87.5
.../315 116.5 128 120.5 108 100.5 84.5
143.5 155 148.5 135 128.5 111.5
.../315 140.5 152 145.5 132 125.5 108.5
99.5 111 103.5 91 83.5 67.5
.../315 96.5 108 100.5 88 80.5 64.5
99.5 111 103.5 91 83.5 67.5
../315 96.5 108 100.5 88 80.5 64.5
Special dim.
See page 52
L8
L9
L10
L11
L12
D**
2)
** Orifice Ø
1)
Orifice M6 tapered
2)
Orifice M6 tapered (NS16, 63), orifice M8 x 1 tapered (NS25...50)
LC; LFA 55/68 RE 21 050/02.99
X
A
D**
X**
Y
Z2
B
M
X
AB
P
T
a
Z2
Y
PT A
F**
A
D**
Y
Z2
B
M
X
AB
P
T
a
Z2
A**
F**
X
A
D**
Y
Z2
B
M
X
AB
P
T
a
P
T
F**
X
A
D**
Y
Z2
B
M
X
AB
P
T
a
P
T
A
Control cover for pressure reducing and isolating functions
Main spool normally closed - LC..DB 40 D.. – separate order
NS 16 to 63
Nominal size 16 =16
Nominal size 25 =25
Nominal size 32 =32
Nominal size 40 =40
Nominal size 50 =50
Nominal size 63 =63
1234567
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
LFA DRW 7X
LFA..DRW.-7X/...
NS 40, 50
LFA..DRW.-7X/...
NS 25, 32
LFA..DRW.-7X/...
NS 16
LFA..DRW.-7X/...
NS 63
Adjustment type
Rotary knob =1
Set screw with hexagon and protection cap =2
Lockable rotary knob with scale =3
1)
Rotary knob with scale =4
025 = Max. secondary pressure 25 bar
075 = Max. secondary pressure 75 bar
150 = Max. secondary pressure 150 bar
210 = Max. secondary pressure 210 bar
315 = Max. secondary pressure 315 bar
7X = Series 7X (NS 16 to 63)
1
) H-key for Material No. R900008158 is included within scope of supply
3WE 6 B9-../..
Solenoid de-energised →
closed
Solenoid energised →
pressure reducing function
3WE 6 B9-../..
Solenoid de-energised →
closed
Solenoid energised →
pressure reducing function
RE 21 050/11.02
RE 21 050/02.99 56/68 LC; LFA
X
Y
BA
P
T
Z2
Ø 39
Ø 35
Ø 40
40
18
34521
321
L12
L8
45
L11
L10
L9
15 7
5.2
9
12
8
14
16
5.1
13 6
11
A
16
Control cover for pressure reducing and isolating functions
Main spool normally closed - LC..DB 40 D.. – separate order
NS 16 to 63
Dimensions in mm
NS 16 25 32 40 50 63
A**
1)
2.0
X**
1)
2.5
F**
1)
0.8 1.0 1.2 1.5 1.5
0.8 3.0 3.0 3.0 3.0 3.0
.../315 0.8 1.8 1.8 1.8 1.8 1.8
18 2
.../315 30.5 14 6
123.5 135 127.5 115 107.5 91.5
.../315 116.5 128 120.5 108 100.5 84.5
147.5 159 152.5 139 129.5 112.5
.../315 140.5 152 145.5 132 125.5 108.5
103.5 115 107.5 95 87.5 71.5
.../315 96.5 108 100.5 88 80.5 64.5
103.5 115 107.5 95 87.5 71.5
../315 96.5 108 100.5 88 80.5 64.5
Special dim.
See page 52
L8
L9
L10
L11
L12
D**
2)
** Orifice Ø
1)
Orifice M6 tapered
2)
Orifice M6 tapered (NS16, 63), orifice M8 x 1 tapered (NS25...50)
5.1 Adjustment element "4"
5.2 Adjustment element "3"
6 Adjustment element "2"
7 Adjustment element "1"
8 Direct operated pressure reducing valve
(included within the scope of supply)
9 Pressure reducing valve name plate
11 Valve fixing screws
M5x50 DIN 912-10.9
M
A
= 8.9 Nm
are included within the control cover
scope of supply
12 Pressure gauge port G 1/4, 12 deep;
Socket screw 6A/F
13 Space required to remove the key
14 Control cover, see page 52
15 Locknut 24A/F
16 For type .../315 → 50 mm
LC; LFA 57/68 RE 21 050/02.99
D**
F**
X
X
A
B
Z2
Y
T
PT A
D**
F**
X
X
A
B
Z2
Y
T
PT A
Z2
Y
D**
F**
X
X
A
B
Z2
Y
T
PT
A**
Z2
D**
F**
X
X
A
B
Z2
Y
T
PT A
B
Z1
Z1
D**
F**
X
X
A
B
Z2
Y
T
PT
A**
Z2
B
Z1
Z1
D**
F**
X
X
A
B
Z2
Y
T
PT A
Z2
Y
Z1
Z1
B
Control cover for pressure reducing functions; electrical-proportional
Main spool normally closed - LC..DB 40 D.. – separate order
NS 25 to 63
1 235 67
Series 7X (NS 25 to 63) = 7X
Pressure stages (pressure reducing valve)
006 = 7.0 bar (only for DREV)
014 = 16.0 bar (only flor DREZ)
Nominal size 25 =25
Nominal size 32 =32
Nominal size 40 =40
Nominal size 50 =50
Nominal size 63 =63
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
LFA 7X
Pressure reducing function; electrical-proportional = DREV
Pressure reducing function; electrical-prop. and = DREZ
possibility for 2-way flow control function
LFA..DREV-7X/006
NS 63
LFA..DREV-7X/006
NS 40, 50
LFA..DREV-7X/006
NS 25, 32
LFA..DREZ-7X/014
NS 25, 32
LFA..DREZ-7X/014
NS 40, 50
LFA..DREZ-7X/014
NS 63
RE 21 050/11.02
RE 21 050/02.99 58/68 LC; LFA
Y
X
X
Y
BA
P
T
L2
Z1
Z2
Z2
16
Z1
L8
L1
50
A
86
T
142
38,5
G1/4; 12
11
14
8
L9
Control cover for pressure reducing functions; electrical-proportional
Main spool normally closed - LC..DB 40 D.. – separate order
NS 25 to 63
Dimensions in mm
8 Pressure reducing valve (is included
within the scope of supply)
11 Valve fixing screws
M5 DIN 912-10.9
M
A
= 8.9 Nm
are included within the scope of supply
14 Control cover, see page 52
16 Proportional pressure relief valve
DBET-5X/...
3)
Y G24-1
4)
(must be ordered separately)
3)
Pressure stages for valve type:
DBET-5X/... 50, 100, 200, 315
and 350 bar
4)
1 = G 1/4 threaded port T,
special poppet
** Orifice Ø
1)
Orifice M6 tapered
2)
Orifice M8 x 1 tapered (NS25...50), orifice M6 tapered (NS63)
NS A**
1)
F**
1)
D**
2)
L1 L2 L8 L9
Special dim.
25 0.8 1.5 85 85 15 42
32 1.0 1.5 100 100 7.5 35
40 1.2 1.8 125 125 22 See page 52
50 1.5 1.8 140 140 15
63 2.0 1.5 1.8 180 180
LC; LFA 59/68 RE 21 050/02.99
D**
F**
X
X
A
B
Z2
Y
PT A
A
B
a
P
T
P
T
D**
F**
X
X
A
B
Z2
PT A
Z2
Y
Y
A
B
a
P
T
P
T
D**
F**
X
X
A
B
Z2 Y
PT
A**
Z2
A
B
P
T
P
T
D**
F**
X
X
A
B
Z2 Y
PT A
A
B
a
P
T
P
T
Z1
Z1
B
D**
F**
X
X
A
B
Z2
PT A
Z2
Y
Y
A
B
a
P
T
P
T
Z1
Z1
B
D**
F**
X
X
A
B
Z2 Y
PT
A**
Z2
A
B
P
T
P
T
Z1
Z1
Control cover for pressure reducing functions and isolating functions; electrical-proportional
Main spool normally closed - LC..DB 40 D.. – separate order
NS 25 to 63
1 235 67
= 7X Series 7X (NS 25 to 63)
Pressure stages
006 = 7.0 bar (only for DREWV)
014 = 16.0 bar (only for DREWZ)
Nominal size 25 =25
Nominal size 32 =32
Nominal size 40 =40
Nominal size 50 =50
Nominal size 63 =63
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
LFA 7X
Pressure reducing function, = DREWV
electrical-proportional and isolating function
Pressure reducing function, electr.-prop. and = DREWZ
isolating function, including possibility for
2-way flow control function
LFA..DREWV-7X/006
NS 25, 32
LFA..DREWV-7X/006
NS 40, 50
LFA..DREWV-7X/006
NS 63
LFA..DREWZ-7X/014
NS 63
LFA..DREWZ-7X/014
NS 40, 50
LFA..DREWZ-7X/014
NS 25, 32
111
1
1
1
1 3WE 6 A-../.. Solenoid de-energised → closed
Solenoid energised → pressure reducing function
RE 21 050/02.99 60/68 LC; LFA
38,5
142
Z1
Z2
Y
X
T
Z1
Z2
P
T
B
A
YX
L2
L8
L1
8
14
16
11
11
G1/4; 12
L9
L10
17
50
Control cover for pressure reducing functions and isolating functions; electrical-proportional
Main spool normally closed - LC..DB 40 D.. – separate order
NS 25 to 63
Dimensions in mm
8 Pressured reducing valve (is included
within the scope of supply)
11 Valve fixing screws
M5 DIN 912-10.9
M
A
= 8.9 Nm
are included with the scope of supply
14 Control cover, see page 52
16 Proportional pressure relief valve
DBET-5X/...
3)
Y G24-1
4)
(must be ordered separately,
see page 49)
17 Directional spool valve 3WE 6 A...
(must be ordered separately,
see page 49)
3)
Pressure stages of valve type:
DBET-5X/... 50, 100, 200, 315
and 350 bar
4)
1 = G 1/4 threaded port T,
special port
** Orifice Ø
1)
Orifice M6 tapered
2)
Orifice M8 x 1 tapered (NS 25...50), orifice M6 tapered (NS 63)
NS A**
1)
F**
1)
D**
2)
L1 L2 L8 L9 L10
Special dim.
25 0.8 1.5 85 85 15 42 30
32 1.0 1.5 100 100 7.5 35 37.5
40 1.2 1.8 125 125 22 50 See page 52
50 1.5 1.8 140 140 15 57.5
63 2.0 1.5 1.8 180 180 81.5
LC; LFA 61/68 RE 21 050/02.99
X
A
Y
Z1
B
Z2
X**
S**
Z**
Y**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
5
7
4
Pressure sequencing functions
General information regarding control cover for pressure sequencing functions
Overview of symbols (basic symbols), pressure sequencing functions
12 34 5 678
Nominal size Type Adjustment Series
Max. settable sequencing
Pilot oil Seal Page
type pressure in bar supply material
•••• • DZ 210 Ordering details 63, 64
•••• • DZWA 315 see pages 65, 66
•••• • DZWB 350 63 and 65 65, 66
Adjustment type for pressure sequence valves
1 = Rotary knob
2 = Hexagon with protective cap
3 = Lockable rotary knob with scale
(H-key to automotive industry standard)
4 = Rotary knob with scale not lockable
Series
7X = Series 70 to 79
(unchanged installation and connection dimensions)
LFA 7X
•= Available
Pilot oil supply
No code =
X = Ordering details to symbol
Y = (see pages 63 and 65)
XY =
Orifice as shown within the main symbol
The orifices built into the control cover are threaded type orifices.
These are standard orifices. No type coded is entered in the
ordering code.
Attention !
Control cover types LFA..DZ...are combined with
2-way cartridge valves type LC..DB...
(for ordering details see page 5)
For seal kits see page 62
Directional spool valve
(porting pattern to DIN 24 340 form A6)
Directional spool valve Catalogue Control cover
Type NS sheet RE No. Type
4WE 6 D../.. 6 23 178 DZWA, DZWB
Attention ! Pilot valves (electrical directional spool valves type
4WE 6 D...) must be ordered separately, for further details see
catalogue sheet RE 23 178.
Valve fixing screws M5 x 50 DIN 912-10.9,
M
A
= 8.9 Nm are included
within the control cover scope of supply.
Control cover with manual pressure adjustment and
pressure dependent or pressure independent sequencing functions
4 WE 6 D ../...
4 WE 6 D ../...
Control cover with manual
pressure adjustment
Solenoid energised: Sequencing function
Solenoid de-energised: Sequencing function
210
LFA..DZ.-../ 315
350
210
LFA..DZWA.-../ 315
350
210
LFA..DZWB.-../ 315
350
Valid symbols are shown in the following type descriptions !
Preferred types and standard components can
be found in the EPS (Standard Price List).
RE 21 050/11.02
RE 21 050/02.99 62/68 LC; LFA
Control cover for pressure sequencing functions
Technical data (for applications outside these parameters, please consult us!)
Control cover
Pressure fluid Mineral oil (HL, HLP) to DIN 51 524
1)
;
Fast bio-degradable pressure fluids to
1)
Suitable for NBR and FKM seals VDMA 24 568 (also see RE 90 221); HETG (rape seed oil)
1)
;
2)
Only suitable for FKM seals HEPG (polyglycols)
2)
; HEES (synthetic ester)
2)
;
Other pressure fluids on request
Pressure fluid temperature range °C– 30 to + 80 for NBR seals
– 20 to + 80 for FKM seals
Viscosity range mm
2
/s 2.8 to 380
Cleanliness class to ISO code Maximum permissible degree of contamination of the pressure
fluid is to ISO 4406 (C) class 20/18/15
3)
Max. perm operating pressure im Anschluss ... Control cover type
LFA..DZ.-../... LFA..DZW.-../...
/.... /...Y
/...X /...XY
...X; ...Z2 315 bar
When regulating the pressure Zero pressure (up to ≈ 2 bar)
Static 315 bar
When regulating the pressure Zero pressure (up to ≈ 2 bar)
Static 315 bar 315 bar
210
Settable sequencing pressure 315
350
210 bar (=)
1)
160 bar (∼)
1)
...Y
...Z1
210 bar (=)
1)
160 bar (∼)
1)
1
) Max. perm. value 4WE 6 D
R-rings dimensions for ports X, Y, Z1, Z2 (are included within the scope of supply)
NS Dimensions Material No.
in mm NBR FKM
16 8.41 x 1.40 x 1.78 R900025407 R900025408
25 9.81 x 1.50 x 1.78 R900017453 R900017610
32 11.18 x 1.60 x 1.78 R900017455 R900017611
40, 50 13.00 x 2.30 x 2.62 R900017457 R900017617
RE 21 050/11.02
3)
The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filteration prevents faults from
occurring and at the same time increases the component service life.
For the selection of filters see catalogue sheets RE 50 070, RE 50 076 and RE 50 081.
LC; LFA 63/68 RE 21 050/02.99
Seal kits for cartridge valves and control covers
Seal kits for cartridge valves
Type LC.. DB../... (NS 16 ... 50)
Seal kits for control cover
Type LFA.. /... (NS 16 ... 50)
Fixing screws (are included within the scope of supply)
S.H.C.S. to DIN 912-10.9
NS Qty. Dimensions Tightening torque in Nm
16 4 M 8 x 115 32
25 4 M 12 x 120 110
32 4 M 16 x 120 270
40 4 M 20 x 70 520
50 4 M 20 x 80 520
Orifice thread size
all built-in orifices: M6 tapered
Seal kit Material No.
for NBR FKM
LC 16 DB..7X/.. R900313104 R900313107
LC 25 DB..7X/.. R900313105 R900313108
LC 32 DB..7X/.. R900313106 R900313109
LC 40 DB..7X/.. R900873022 R900873025
LC 50 DB..7X/.. R900873023 R900873026
Seal kit Material No.
for LFA… 16 25 32 40 50
NBR FKM NBR FKM NBR FKM NBR FKM NBR FKM
R900860006 R900311540 R900311541 R900309378 R900312089
...DZ...
...DZW...
RE 21 050/11.02
RE 21 050/02.99 64/68 LC; LFA
X
A
Y
Z1
B
Z2
X**
S**
Z**
Y**
X
A
Y
Z1
B
Z2
X**
S**
Z**
Y**
X
A
Y
Z1
B
Z2
X**
S**
Z**
Y**
X
A
Y
Z1
B
Z2
X**
S**
Z**
Y**
Control cover for pressure sequencing functions
1 2345678
NS 16 to 50
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
LFA DZ 7X
Adjustment type
Rotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standards)
Rotary knob with scale not lockable = 4
Nominal size 16 =16
Nominal size 25 =25
Nominal size 32 =32
Nominal size 40 =40
Nominal size 50 =50
Series 7X (NS 16 to 50) = 7X
Pressure stages (max. settable sequencing pressure)
210 bar = 210
315 bar = 315
350 bar = 350
Pilot oil supply
Pilot oil Pilot oil
supply drain
No code = Internal Internal
X=External Internal
Y=Internal External
XY = External External
210
LFA..DZ.-../ 315
350
210
LFA..DZ.-../ 315 X
350
210
LFA..DZ.-../ 315 Y
350
210
LFA..DZ.-../ 315 XY
350
LC; LFA 65/68 RE 21 050/02.99
Z2
H1H3
H4
X
6
7
32
Ø 35
13 2
YS, Z
13 2
4
L1
4
4
XY
Z1
1
SW30
max. 34,5
Ø 50
SW30
8
2
SW30
8
83
106,5 18
Ø 45
3; 4 5
max. 98
Ø 50
SW32
8
2
114
138 18
3, 4 5
Ø 45
Ø 35
8
SW32
8
83
SW6
1
SW10
L2
L3
NS 16 bis 50
Control cover for pressure sequencing functions
210 bar
315 bar
350 bar
1 Adjustment type "2"
2 Adjustment type "1"
3 Adjustment type "3"
4 Adjustment type "4"
5 Space required to remove
the key
6 Locating pin
7 Name plate
8 Locknut
NS S**
1)
X**
1)
Y**
1)
Z**
1)
H1 H3 H4 L1 L2 L3
16 0.8 0.8 1.0 1.0 40 16 20 65 105 39.5
25 0.8 0.8 1.0 1.0 40 24 20 85 110 53
32 1.0 1.0 1.2 1.2 50 28 25 100 115 60.5
40 1.0 1.0 1.2 1.2 60 32 36 125 125 62.5
50 1.0 1.0 1.2 1.2 68 34 36 140 140 70
** Orifice Ø
1)
All orifices M6 tapered
30A/F
30A/F
30A/F
10A/F
32A/F
32A/F
6A/F
RE 21 050/02.99 66/68 LC; LFA
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
X
A
Y
Z1
B
P
T
A
B
a
Z2
X**
S**
Z**
Y**
P**
Control cover for pressure dependent and independent sequencing functions
1 2345678
NS 16 to 50
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
LFA 7X
Adjustment type
Rotary knob = 1
Hexagon with protective cap = 2
Lockable rotary knob with scale = 3
(H-key to automotive industry standards)
Rotary knob with scale not lockable = 4
Nominal size 16 =16
Nominal size 25 =25
Nominal size 32 =32
Nominal size 40 =40
Nominal size 50 =50
Series 7X (NS 16 to 50) = 7X
Pressure stages (max. settable sequencing pressure)
210 = 210 bar
315 = 315 bar
350 = 350 bar
Pilot oil supply
Pilot oil Pilot oil
supply drain
No code = Internal Internal
X=External Internal
Y=Internal External
XY = External External
Solenoid de-energised: Pressure sequence function
= DZWA
Solenoid energised: Open
Solenoid de-energised: Open =DZWB
solenoid energised: Pressure sequence function
4 WE 6 D ../..
210
LFA..DZWA.-../ 315
350
210
LFA..DZWB.-../ 315
350
210
LFA..DZWA.-../ 315 Y
350
210
LFA..DZWA.-../ 315 X
350
210
LFA..DZWA.-../ 315 XY
350
210
LFA..DZWB.-../ 315 Y
350
210
LFA..DZWB.-../ 315 X
350
210
LFA..DZWB.-../ 315 XY
350
4 WE 6 D ../.. 4 WE 6 D ../.. 4 WE 6 D ../..
4 WE 6 D ../..
4 WE 6 D ../.. 4 WE 6 D ../.. 4 WE 6 D ../..
LC; LFA 67/68 RE 21 050/02.99
Z2
H1H3
H4
X
6
7
32
Ø 35
13 2
YS, Z
13 2
4
L1
4
4
X
Y
Z1
1
SW30
max. 34,5
Ø 50
SW30
8
2
SW30
8
83
106,5 18
Ø 45
3, 4 5
max. 98
Ø 50
SW32
8
2
114
138 18
3, 4
5
Ø 45
Ø 35
8
SW32
8
83
SW6
1
SW10
P
B
A
BA
P
T
9
11
10
L6 40,5
32,5
L3
L2
L7
NS 16 to 50
Control cover for pressure dependent and indpendent sequencing functions
210 bar
315 bar
350 bar
NS S**
1)
X**
1)
Y**
1)
Z**
1)
P**
1)
H1 H3 H4 L1 L2 L3 L6 L7
16 0.8 0.8 1.0 1.0 1.0 40 16 20 65 105 39.5 16 49
25 0.8 0.8 1.0 1.0 1.0 40 24 20 85 110 53 21 59
32 1.0 1.0 1.2 1.2 1.2 50 28 25 100 115 60.5 26.5 66.5
40 1.0 1.0 1.2 1.2 1.2 60 32 36 125 125 62.5 55 76.5
50 1.0 1.0 1.2 1.2 1.2 68 34 36 140 140 70 70 84
** Orifice Ø
1)
All orifices 6 tapered
1 Adjustment type "2"
2 Adjustment type "1"
3 Adjustment type "3"
4 Adjustment type "4"
5 Space required to remove the key
6 Locating pin
7 Name plate
8 Locknut
9 Plug M6 tapered for DZWA..
10 Plug M6 tapered for DZWB..
11 Valve fixing screws are included
within the control cover scope of supply
Directional spool valve . WE 6 D...
30A/F
30A/F
30A/F
10A/F
32A/F
32A/F
6A/F
RE 21 050/02.03 68/68 LC; LFA
Bosch Rexroth AG
Industrial Hydraulics
D-97813 Lohr am Main
Zum Eisengießer 1 • D-97816 Lohr am Main
Telefon 0 93 52 / 18-0
Telefax 0 93 52 / 18-23 58 • Telex 6 89 418-0
eMail documentation@boschrexroth.de
Internet www.boschrexroth.de
The data specified above only serves to describe
the product. No statements concerning a certain
condition or suitability for a certain application
can be derived from our information.
The details stated do not release you from the
responsibility for carrying out your own
assessment and verification. It must be
remembered that our products are subject to a
natural process of wear and ageing.
Bosch Rexroth Limited
Cromwell Road, St Neots,
Cambs, PE19 2ES
Tel: 0 14 80/22 32 56
Fax: 0 14 80/21 90 52
E-mail: info@boschrexroth.co.uk
Notes
