RE27506, edition: 2020-10, Bosch Rexroth AG
Features
▶ Sandwich plate valve for use in vertical stackings
▶ Porting pattern according to ISO4401-03-02-0-05 and
NFPAT3.5.1 R2-2002 D03 (with or without locating
hole)
▶ For the main or pilot ow limitation of 2 actuator ports
▶ For supply or discharge throttling
▶ 3 adjustment types:
– Setscrew with lock nut and protective cap
– Lockable rotary knob with scale
– Spindle with internal hexagon and scale
▶ Corrosion-protected design optional
▶ Size6
▶ Component series 4X
▶ Maximum operating pressure 350bar
▶ Maximum ow 80l/min
H8175
RE27506
Edition: 2020-10
Replaces: 2020-06
Throttle check valve
TypeZ2FS
Contents
Features 1
Ordering code 2
Symbols 3
Function, section 4
Technical data 5
Characteristic curves 6
Dimensions 7
Accessories 8
Further information 8
Inhalt
Features 1
Contents 1
Ordering code 2
Symbols (①=component side, ②=plate side) 3
Function, section 4
Technical data
(For applications outside these values, please consult
us!) 5
Characteristic curves
(measured with HLP46, ϑ
oil
=40 ±5°C, averages) 6
Dimensions
(dimensions in mm) 7
Accessories (separate order) 8
Further information 8
2/8 Z2FS | Throttle check valve
BoschRexrothAG, RE27506, edition: 2020-10
Ordering code
01 Throttle check valve Z2FS
02 Size6 6
03 Throttle check valve sideA and B –
1)
Throttle check valve side A A
Throttle check valve side B B
Adjustment type
04 Setscrew with lock nut and protective cap (versions "J3" and "J5" without protective cap) 2
Lockable rotary knob with scale 3
2)
Spindle with internal hexagon and scale 5
05 Component series 40…49(40…49: unchanged installation and mounting dimensions) 4X
06 With ne adjustment 1Q
Standard version 2Q
Corrosion resistance (outside)
07 None (valve housing primed) no code
Improved corrosion protection(240h salt spray test according to ENISO9227) J3
3)
High corrosion protection(720h salt spray test according to ENISO9227) J5
3)
Seal material (observe compatibility of seals with hydraulic uid used, seepage5)
08 NBR seals no code
FKM seals V
09 Without locating hole no code
With locating hole /60
4)
10 Further details in the plain text *
01 02 03 04 05 06 07 08 09 10
Z2FS 6 – 4X / *
Notes:
▶ For valve types for use in potentially explosive atmospheres,
refer to data sheet07011.
▶ Preferred types and standard units are contained in the EPS
(standard price list).
1)
Identical adjustment types on sidesA and B
2)
H-key with material no.R900008158 is included in the scope
of delivery.
3)
Only adjustment types "2" and "/60"
4)
Locking pin ISO8752-3x8-St, material no.R90005694
(separate order)
Throttle check valve | Z2FS 3/8
RE27506, edition: 2020-10, Bosch Rexroth AG
Symbols (①=component side, ②=plate side)
Supply throttling Discharge throttling
Version "–"
1
2
TPAB
1
2
TPAB
Version"A"
1
2
TPAB
1
2
TPAB
Version"B"
1
2
TPAB
1
2
TPAB
Notice:
Modication from supply to discharge throttling is realized by
horizontal rotation of the device
5
AB
4 2
31
1
2
AB
4/8 Z2FS | Throttle check valve
BoschRexrothAG, RE27506, edition: 2020-10
Function, section
The hydraulic fluid return flow from actuatorA② displaces
the valve seat(2) against the spring(5) in the direction of
the throttle spool(3) and enables the unobstructed flow
as check valve. Depending on the installation position, the
throttling effect may occur in supply or discharge.
Main ow limitation (version "2Q")
For actuator velocity adjustment (main flow limitation),
the throttle check valve is installed between the directional
valve and the subplate.
Pilot ow limitation (version "1Q")
With pilot-operated directional valves, the throttle check
valve can be applied for switching time adjustment (pilot
flow limitation). In this case, it is installed between the
pilot control valve and the main valve.
The valve typeZ2FS is a throttle check valve in sandwich
plate design. It is used for the main or pilot flow limitation
of one or two actuator ports.
Two throttle check valves aligned symmetrically to each
other limit flows in one direction and allow free return flow
in the opposite direction.
In case of supply throttling, the hydraulic fluid is directed
via channelA① via throttling point(1) formed by the valve
seat(2) and the throttle spool(3) to actuator A②. The
throttle spool(3) can be axially adjusted via the set-
screw(4) for adjustment of the throttling point(1).
Type Z2FS 6 –2… (supply throttling)
①=component side
②=plate side
Throttle check valve | Z2FS 5/8
RE27506, edition: 2020-10, Bosch Rexroth AG
Technical data
(For applications outside these values, please consult us!)
General
Z2FS6A./…Z2FS6B./… Z2FS6.-./…
Weight ▶ Version "2" kg 0.9 1.0
▶ Version "3" kg 1.1 1.4
▶ Version "5" kg 1.0 1.2
Installation position any
Ambient temperature range °C –30 ... +80 (NBR seals)
–20 … +80 (FKM seals)
Storage temperature range seeoperating instructions 07600-B
Hydraulic
Maximum operating pressure
bar 350
Maximum flow
l/min 80
Maximum leakage (at ∆p 350bar)
l/min <1
Hydraulic fluid
seetable below
Hydraulic fluid temperature range
°C –30 ... +80 (NBR seals)
–20 … +80 (FKM seals)
Viscosity range
mm
2
/s 10 … 800
Maximum admissible degree of contamination of the
hydraulic fluid, cleanliness class according to ISO4406 (c)
Class20/18/15
1)
Hydraulic fluid Classification Suitable sealing materi-
als
Standards Datasheet
Mineral oils HL, HLP, HLPD, HVLP, HVLPD NBR, FKM DIN51524 90220
Bio-degradable ▶ Insoluble in water HETG FKM
ISO15380
90221HEES FKM
▶ Soluble in water HEPG FKM ISO15380
Flame-resistant ▶ Water-free HFDU (glycol base) FKM
ISO12922 90222
HFDU (ester base) FKM
HFDR FKM
▶ Containing water HFC(Fuchs: Hydrotherm46M,
Renosafe500;
Petrofer: UltraSafe620; Hough-
ton: Safe620;
Union: CarbideHP5046)
NBR
ISO12922 90223
Important information on hydraulic uids:
▶ For further information and data on the use of other hydraulic
fluids, please refer to the data sheets above or contact us.
▶ There may be limitations regarding the technical valve data
(temperature, pressure range, life cycle, maintenance intervals,
etc.).
▶ The ignition temperature of the hydraulic fluid used must be 50K
higher than the maximum surface temperature.
▶ Bio-degradable and flame-resistant – containing water: If
components with galvanic zinc coating (e.g.version"J3" or "J5")
or parts containing zinc are used, small amounts of dissolved zinc
may get into the hydraulic system and cause accelerated aging of
the hydraulic fluid. Zinc soap may form as achemical reaction
product, which may clog filters, nozzles and solenoid valves –
particularly in connection with local heat input.
▶ Flame-resistant – containing water:
Due to the increased cavitation tendency with HFChydraulic
fluids, the life cycle of the component may be reduced by up to
30% as compared to the use with mineral oil HLP. In order to
reduce the cavitation effect, it is recommended - if possible
specific to the installation - to back up the return flow pressure in
portsT to approx.20% of the pressure differential at the compo-
nent.
1)
The cleanliness classes specified for the components must be
adhered to in hydraulic systems. Effective filtration prevents
faults and simultaneously increases the life cycle of the
components.
For the selection of filters, seewww.boschrexroth.com/filter.
9
10
11
90
80
70
60
50
40
30
20
10
5
11,
2345 67 8
250
200
150
100
90
80
70
60
50
40
30
20
10
5
01020304050607080
910 11 11,5
0 2010 30 5040 60 70
80
5
10
15
20
6/8 Z2FS | Throttle check valve
BoschRexrothAG, RE27506, edition: 2020-10
∆p-q
V
characteristic curves
(via check valve; throttle closed)
∆p-q
V
characteristic curves (version "2Q") ∆p-q
V
characteristic curves (version "1Q")
Pressure differential inbar →
Pressure differential inbar →
Flow inl/min →
Flow inl/min →
Flow inl/min →
Pressure differential inbar →
Throttle position in rotations
Throttle position in rotations
Characteristic curves
(measured with HLP46, ϑ
oil
=40 ±5°C, averages)
Rzmax 4
0,01/100
3
820
35
64
18
4 x ø5.4
45
81
45
46
8
Ø32
75 24 20
91
A
T
B
P
"X"
"X"
38.6
61 x 40
F1 F2
F3
F4
G
45
7
1.4
22.6
1
2
8; 11
8; 11
4
2
13
12
6
5
12
3; 11
1
9
10
7
"X"
7
14
Throttle check valve | Z2FS 7/8
RE27506, edition: 2020-10, Bosch Rexroth AG
Dimensions
(dimensions in mm)
Required surface quality of the
valve contact surface
Notice:
The dimensions are nominal dimensions which are subject to
tolerances.
①
component side – porting pattern according to
ISO4401-03-02-0-05 and NFPAT3.5.1R2-2002 D03 (with
locating hole Ø4x4mm deep; version "/60" or without
locating hole)
②
plate side – porting pattern according to
ISO4401-03-02-0-05 and NFPAT3.5.1R2-2002 D03 (with
locating hole Ø3x5mm deep for locking pin ISO8752-3x8-St;
version "/60" or without locating hole)
1 Name plate
2 Adjustment type"2"
3 Adjustment type"3"
4 Adjustment type"5"
5 Space required to remove the key
6 Valve mounting bores
7 Lock nut SW10
8 Setscrew/spindle for ow cross-section adjustment (internal
hexagon SW5)
9 Identical seal rings for portsA, B,P, and T
10 Seal ring plate
11 For all adjustment types:
Left rotation=higher ow
Right rotation=lower ow
12 Modication from supply to discharge throttling is realized by
rotation of the device around axis "X" – "X"
13 Stroke
14 Plug screw SW22
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO4762 - M5 - 10.9
4 hexagon socket head cap screws
N10-24 UNC ASTM - A574
Notes:
▶ Length and tightening torque of the valve mounting screws
must be calculated according to the components mounted
under and over the sandwich plate valve.
▶ The dimensions are nominal dimensions which are subject
to tolerances.
BoschRexrothAG, RE27506, edition: 2020-10
8/8 Z2FS | Throttle check valve
Bosch Rexroth AG
Industrial Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 40 30 20
my.support@boschrexroth.de
www.boschrexroth.de
© All rights reserved to BoschRexrothAG, also regarding any disposal,
exploitation, reproduction, editing, distribution, as well as in the event of
applications for industrial property rights.
The data specied 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 verication.
It must be remembered that our products are subject to anatural process of
wear and aging.
Further information
▶ Hydraulic uids on mineral oil basis Datasheet90220
▶ Environmentally compatible hydraulic uids Datasheet90221
▶ Flame-resistant, water-free hydraulic uids Datasheet90222
▶ Flame-resistant hydraulic uids - containing water (HFAE, HFAS, HFB, HFC) Datasheet90223
▶ Hydraulic valves for industrial applications Operating instruc-
tions07600-B
▶ Use of non-electrical hydraulic components in explosive atmospheres (ATEX) Datasheet07011
▶ Selection of lters www.boschrexroth.com/filter
▶ Information on available spare parts www.boschrexroth.com/spc
Accessories (separate order)
Denomination Material no.
Protective cap R900692658
Locking pin R90005694