1/12
Information on available spare parts:
www.boschrexroth.com/spc
Sizes 10 to 32
Component series 2X
Maximum operating pressure 350 bar
Maximum flow 520 l/min
Meter-in pressure compensator,
direct operated
Type ZDC
RE 29224/11.07
Replaces: 02.03
Table of contents Features
– Sandwich plate valve
– Porting pattern to ISO 4401
– Load compensation in channel P → A or P → B by integrated
shuttle valve
– 2-way design “P“
– 3-way design “PT“ (sizes 10 to 25)
– Flow control in interaction with proportional directional valve
Content Page
Features 1
Ordering code 2
Symbols 2, 3
Function, section 3
Technical data 4
Characteristic curves 5, 6
Unit dimensions 7 to 10
Pilot oil supply 11, 12
tb0217
Inhalt
Table of contents 1
Features 1
Ordering code 2
Symbols: 2-way design “P“ (① = component side, ② = plate
side) 2
Symbols: 3-way design “PT“ (① = component side, ② = plate
side) 3
Function, section 3
Technical data (for applications outside these parameters,
please consult us!) 4
Characteristic curves (measured with HLP46 and ϑ
oil
= 40 °C
±5 °C) 5
Characteristic curves (measured with HLP46 and ϑ
oil
= 40 °C
±5 °C) 6
Unit dimensions: Size 10 (dimensions in mm) 7
Unit dimensions: Size 16 (dimensions in mm) 8
Unit dimensions: Size 25 (dimensions in mm) 9
Unit dimensions: Size 32 (dimensions in mm) 10
Pilot oil supply 11
Pilot oil supply 12
2/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07
Ordering code
Further details in clear text
Seal material
M = NBR seals
V = FKM seals
(other seals on request)
Attention!
Observe compatibility of seals with hydraulic
fluid used!
No code = Without special type of protection
J = Seawater-resistant
Size 10 = 10
Size 16 = 16
Size 25 = 25
Size 32 (variant “P“ only) = 32
2-way design (pressure reducing function) = P
3-way design (pressure relief function) = PT
Component series 20 to 29 = 2X
(20 to 29: unchanged installation and connection dimen-
sions)
Pilot oil supply “internal” = No code
Pilot oil supply “external = X
Pilot oil supply external, port X on component side = XL
plugged (size 10 only)
Symbols: 2-way design “P“ (① = component side, ② = plate side)
ZDC 2X
*
Pilot oil supply “internal“
Type ZDC . P-2X/…
TPAB
1
2
X Y
Pilot oil supply “external“
Type ZDC . P-2X/X…
TPAB
1
2
X Y
Pilot oil supply “external“,
port X on component side
plugged (size 10 only)
Type ZDC 10 P-2X/XL…
PAB
1
2
X Y
T
Standard types and components can be found
in the EPS (standard price list).
AA
5 1243
X
T
A
P
B
Y
1
2
X
T
A
P
B
Y
A
B
6
Hydraulics Bosch Rexroth AGRE 29224/11.07 ZDC
3/12
Valves of type ZDC are direct operated meter-in pressure
compensators of 2- or 3-way design.
They are used for load compensation as meter-in pressure
compensator in channel P.
These valves basically consist of housing (1), control spool
(2), compression spring (3) with spring plate (4), and cover
(5) with integrated shuttle valve (6).
Function, section
Section A–A
Symbols: 3-way design “PT“ (① = component side, ② = plate side)
Pilot oil supply “internal“
Type ZDC . PT-2X/…
PAB
1
2
X Y
T
Pilot oil supply “external“
Type ZDC . PT-2X/X…
TPAB
1
2
X Y
Pilot oil supply “external“,
port X on component side
plugged (size 10 only)
Type ZDC 10 PT-2X/XL…
TPAB
1
2
X Y
Compression spring (3) holds control spool (2) in the open
position from P2 to P1, when pressure differential P1 → A1 or
P1 → B1 is less than 10 bar.
When the pressure differential exceeds 10 bar, control spool
(2) is pushed to the left until the pressure differential is re-
stored.
4/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07
Technical data (for applications outside these parameters, please consult us!)
General
Size Size 10 16 25 32
Weight kg 3.0 3.5 8.9 64.7
Installation position Optional
1)
Suitable for NBR and FKM seals
2)
Suitable only for FKM seals
3)
The cleanliness classes specified for components must be
adhered to in hydraulic systems. Effective filtration prevents
malfunction and, at the same time, prolongs the service life
of components.
For the selection of filters, see data sheets RE 50070,
RE 50076, RE 50081, RE 50086, RE 50087 and RE 50088.
Hydraulic
Maximum operating pres-
sure
– Ports A, B, P bar 350
– Port T bar 250
– Port X bar 30 to 100
– Port Y bar 150; up to 30 bar in conjunction with pilot operated propor-
tional directional valve
Maximum flow l/min 85 150 325 520
Hydraulic fluid Mineral oil (HL, HLP) to DIN 51524
1)
; fast bio-degradable
hydraulic fluids to VDMA 24568 (see also RE 90221); HETG
(rape seed oil)
1)
; HEPG (polyglycols)
2)
; HEES (synthetic
esters)
2)
; other hydraulic fluids on request
Hydraulic fluid temperature range °C –20 to +70
Viscosity range mm
2
/s 15 to 380
Permissible max. degree of contamination of the
hydraulic fluid - cleanliness class to ISO 4406 (c)
Class 20/18/15
3)
80
70
60
50
40
30
20
10
020406080 100
1
5
2
3
6
4
50
40
30
20
10
020406080
50
40
30
20
10
0255075 100 175125 150
175
150
125
100
75
50
25
020406080 100
2
1
Hydraulics Bosch Rexroth AGRE 29224/11.07 ZDC
5/12
Characteristic curves (measured with HLP46 and ϑ
oil
= 40 °C ±5 °C)
Flow control P to A, P to B
Pressure differential in bar →
Flow in l/min →
1 With type 4WRZ 10…85…
2 With type 4WRZ 10…50…
3 With type 4WRZ 10…25…
4 With type 4WRZ 10…64…
Flow in l/min → Flow in l/min →
Command value in % →
Flow in l/min →Command value in % →
Flow control
range
Throttling range
Flow control
range
Throttling range
Size 10 Size 10
Size 16 Size 16
5 With type 4WRZ 10…32…
6 With type 4WRZ 10…16…
Pressure differential ∆p
min
= p
pump
– p
load
1 With type 4 WRZ 16…100…
2 With type 4 WRZ 16…150…
Pressure differential in bar →
Pressure differential ∆p
min
= p
pump
– p
load
350
300
250
200
150
100
50
020406080 100
2
1
50
40
30
20
10
050 100 150 200 350250 300
700
600
500
400
300
200
100
020406080 100
2
1
50
40
30
20
10
0 100 200 300 400 700500 600
6/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07
Characteristic curves (measured with HLP46 and ϑ
oil
= 40 °C ±5 °C)
Flow control P to A, P to B
Size 25 Size 25
1 With type 4 WRZ 25…270…
2 With type 4 WRZ 25…325…
Flow in l/min
→
Flow in l/min → Flow in l/min →
Command value in % →
Flow in l/min →Command value in % →
Flow control
range
Throttling range
Flow control
range
Throttling range
Pressure differential in bar →
Size 32 Size 32
1 With type 4 WRZ 32…360…
2 With type 4 WRZ 32…520…
Pressure differential in bar →
Pressure differential ∆p
min
= p
pump
– p
load
Pressure differential ∆p
min
= p
pump
– p
load
148
25,5
3,5
70
11,8
X
TA
A
P
B
Y
25
6
71
4 x 6,6
70
F1
F2
F3
F4
415
2,5
Hydraulics Bosch Rexroth AGRE 29224/11.07 ZDC
7/12
Unit dimensions: Size 10 (dimensions in mm)
1 Nameplate
4 Idential seal rings for ports A, B, P, T;
Idential seal rings for ports X, Y (plate side)
5 Porting pattern ISO 4401-05-05-0-05
6 Valve mounting screws (see on the right)
Required surface quality of
valve mounting face
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M6 - 10.9
Note!
The length and tightening torque of the valve mounting
screws must be calculated in conjunction with the compo-
nents mounted below and above the sandwich plate valve.
603
3
2
4 x 11
2 x
6,6
1
3
52
T
P
X
A
B
Y
10,5
F1
F2
F3
F4
G1
G2
F6
F5
66 3
25
166
14
91
5
2,5
8/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07
Unit dimensions: Size 16 (dimensions in mm)
Required surface quality of
valve mounting face
1 Nameplate
2 Locating pin
3 Bore for locating pins
4 Idential seal rings for ports A, B, P, T;
Idential seal rings for ports X, Y (plate side)
5 Porting pattern ISO 4401-07-07-0-05
6 Valve mounting screws (see on the right)
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M10 - 10.9
2 hexagon socket head cap screws ISO 4762 - M6 - 10.9
Note!
The length and tightening torque of the valve mounting
screws must be calculated in conjunction with the compo-
nents mounted below and above the sandwich plate valve.
83
4
44
6
214
T
P
Y
X
A
B
117
12,5
60
6 x 14
6
210
3
3
F1
F2
F3
F4
G1
G2
F6
F5
5
2,5
Hydraulics Bosch Rexroth AGRE 29224/11.07 ZDC
9/12
Unit dimensions: Size 25 (dimensions in mm)
Required surface quality of
valve mounting face
1 Nameplate
2 Locating pin
3 Bore for locating pins
4 Idential seal rings for ports A, B, P, T;
Idential seal rings for ports X, Y (plate side)
5 Porting pattern ISO 4401-08-08-0-05
6 Valve mounting screws (see on the right)
Valve mounting screws (separate order)
6 hexagon socket head cap screws ISO 4762 - M12 - 10.9
Note!
The length and tightening torque of the valve mounting
screws must be calculated in conjunction with the compo-
nents mounted below and above the sandwich plate valve.
362
95
75
200
T
P
Y
B
A
X
6 x 22
20,5
24,5
260
370
440
70
4
100
165
4
1
6
125
F3
F4
F1
F2
G2
3
F6
G1
F5
5
2,5
10/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07
Unit dimensions: Size 32 (dimensions in mm)
Required surface quality of
valve mounting face
1 Nameplate
2 Locating pin
3 Bore for locating pins
4 Idential seal rings for ports A, B, P, T;
Idential seal rings for ports X, Y (plate side)
5 Porting pattern ISO 4401-10-09-0-05
6 Valve mounting screws (see on the right)
Valve mounting screws (separate order)
6 hexagon socket head cap screws ISO 4762 - M20 - 10.9
Note!
The length and tightening torque of the valve mounting
screws must be calculated in conjunction with the compo-
nents mounted below and above the sandwich plate valve.
TPAB
1
2
X Y
ab
a0b
TPABXY
PAB
1
2
X Y
ab
a0b
PABXY
T
T
X
T
A
P
B
Y
1
2
X
T
A
P
B
Y
X
P
2
X
P
2
B
B
AB
Y
TPX
P
X
P
X
Hydraulics Bosch Rexroth AGRE 29224/11.07 ZDC
11/12
Pilot oil supply
Attention!
In conjunction with the meter-in pressure compensator the
pilot operated proportional valve must be used in the variant
with “external pilot oil supply“!
Type 4WRZ…
Type ZDC..P-2X/X…Type ZDC..P-2X/…
Size 10
External
Internal
With external pilot oil supply the connection to channel P is
closed. The pilot oil is taken from a separate control circuit.
With internal pilot oil supply the connection to channel P is
open. The pilot oil is taken from the throttle side of the pres-
sure compensator (port X in the subplate is closed).
Type 4WRZ…
Size 16
External
Internal
Section B–B
C
C
A
X
T
P
Y
B
P
X
P
X
D
D
T
P
A
B
X
X
P
X
P
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other informa-
tion set forth in it, are the exclusive property of Bosch Rexroth AG. It
may not be reproduced or given to third parties without its consent.
The data specified above only serve to describe the product. No
statements concerning a certain condition or suitability for a certain
application can be derived from our information. The information given
does not
release the user from the obligation of own judgment and verification. It
must be remembered that our products are subject to a natural process
of wear and aging.
12/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07
Pilot oil supply
Size 25
External
Internal
Size 32
External
Internal
Section D–D
Section C–C