RE21548, 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 leakage-free blocking of one or two actuator
ports, optional
▶ Various cracking pressures, optional
▶ With pre-opening, optional
▶ Corrosion-protected design optional
Contents
Features 1
Ordering code 2
Symbols 3
Function, sections, circuit example 4, 5
Technical data 6
Characteristic curves 7
Dimensions 8
Further information 9
▶ Size6
▶ Component series 6X
▶ Maximum operating pressure 350bar
▶ Maximum ow 80l/min
H8176
Check valve,
pilot operated
RE21548
Edition: 2020-10
Replaces: 2013-06
TypeZ2S
Inhalt
Features 1
Contents 1
Ordering code 2
Symbols (①=component side, ②=plate side) 3
Function, sections, circuit example 4
Function, sections 5
Technical data
(For applications outside these values, please consult
us!) 6
Characteristic curves
(measured with HLP46, ϑ
oil
=40 ±5°C, averages) 7
Dimensions
(dimensions in mm) 8
Further information 9
Notes 10
Notes 11
Notes 12
2/12 Z2S | Check valve
BoschRexrothAG, RE21548, edition: 2020-10
Ordering code
01 Check valve, sandwich plate design Z2S
02 Size6 6
Leakage-free blocking
03 In channelA and B –
In channel A A
In channel B B
Cracking pressure
04 1.5 bar 1
3 bar 2
6 bar 3
10 bar 4
05 Component series 60…69(60…69: unchanged installation and connection dimensions) 6X
Seal material (observe compatibility of seals with hydraulic uid used, seepage6)
06 NBR seals no code
FKM seals V
Corrosion resistance (outside)
07 None (valve housing primed) no code
Improved corrosion protection(240h salt spray test according to ENISO9227) J3
Locating hole
08 Without locating hole no code
With locating hole /60
1)
Special versions
09 Without special version no code
Control open by external port G1/4 (only version"A" or"B") SO40
With pre-opening SO55
Control spool unloaded to port T SO60
With pre-opening and control open from channel P SO150
Symbols (examples) seepage3
10 Further details in the plain text
01 02 03 04 05 06 07 08 09 10
Z2S 6 – 6X / *
1)
Locking pin ISO8752-3x8-St, material no.R900005694
(separate order)
Check valve | Z2S 3/12
RE21548, edition: 2020-10, Bosch Rexroth AG
TypeZ2S 6 A… TypeZ2S 6 –…and Z2S 6 –…SO55


TypeZ2S 6 B…


TypeZ2S 6 A…SO40 TypeZ2S 6 A…SO60
TypeZ2S 6 –…SO150
Symbols (①=component side, ②=plate side)














4/12 Z2S | Check valve
BoschRexrothAG, RE21548, edition: 2020-10
Function, sections, circuit example
The isolator valve typeZ2S is a releasable check valve in
sandwich plate design.
It is used for the leakage-free blocking of one or two
actuator ports, even for long standstill times.
In direction A① to A② or B① to B②, there is a free flow;
in the opposite direction, the flow is blocked.
If, for example, there is a flow through the valve in
direction A① to A②, control spool(1) is moved in
directionB side and pushes the poppet(2) off its seat.
Hydraulic fluid can now flow from B② to B①.
In order to allow the poppets to be safely closed(2),
the control spool(1) must be hydraulically unloaded
(seecircuit example).
Pre-opening
▶ The two-stage set-up with an increased control open
ratio means even low pilot pressure can be unloaded
securely.
▶ Avoidance of switching shocks due to dampened
decompression of the pressure volume on the actuator
side.
TypeZ2S 6 –… (without pre-opening)
TypeZ2S 6 A…
①=component side
②=plate side
1 Control spool, areaA
2
2 Poppet, areaA
1
3 Stop
Circuit example,
schematic
Notice:
In valves without pre-opening, sudden unloading
of pent-up pressure volume may occur. Resulting
switching shocks may lead to premature wear on
installed components, as well as noise formation.






Check valve | Z2S 5/12
RE21548, edition: 2020-10, Bosch Rexroth AG
Function, sections
TypeZ2S 6 –…SO55
(with pre-opening)
TypeZ2S 6 A…SO40
TypeZ2S 6 A…SO60
1 Control spool, areaA
2
2 Poppet, areaA
1
3 Stop
4 Control spool, areaA
4
5 Pre-opening, areaA
3
①=component side
②=plate side
6/12 Z2S | Check valve
BoschRexrothAG, RE21548, edition: 2020-10
Technical data
(For applications outside these values, please consult us!)
Hydraulic
Maximum operating pressure
bar 350
Cracking pressure in free direction
seecharacteristic curves page7
Maximum flow
l/min 80
Direction of flow
seesymbols page3
Hydraulic fluid
seetable below
Hydraulic fluid temperature range
(at the valve working ports)
°C –30 ... +80 (NBR seals)
–20 … +80 (FKM seals)
Viscosity range
mm
2
/s 2,8 … 500
Maximum admissible degree of contamination of the
hydraulic fluid, cleanliness class according to ISO4406 (c)
Class20/18/15
1)
Area ratio ▶ Without pre-opening A
1
/A
2
~ 1/3.5 (seesectional drawing page4)
▶ With pre-opening A
3
/A
2
~ 1/12.5 (seesectional drawing page5)
▶ Version "SO60" A
1
/A
4
~ 1/7 (seesectional drawing page5)
General
Weight kg approx.0.8
Installation position any
Ambient temperature range °C –30 ... +80 (NBR seals)
–20 … +80 (FKM seals)
Storage temperature range seeoperating instructions 07600-B
MTTF
D
values according to ENISO13849 years 150 ... 1200 (for more information seedata sheet08012)
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.
Hydraulic fluid Classification Suitable
sealing materials
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 90222HFDU (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
component.
For the selection of filters, seewww.boschrexroth.com/filter.
1
1
2
2
1,2,3,4
5
6
5
1,2,3,4
51,2,3,4
0
3
4
5
1
2
6
10 20 30 40 50 60 70 80
5
10
15
20
25
30
35
Check valve | Z2S 7/12
RE21548, edition: 2020-10, Bosch Rexroth AG
Flow inl/min →
Pressure differential inbar →
∆p-q
V
characteristic curves
Cracking pressure:
1 1.5 bar
2 3 bar
3 6 bar
4 10 bar
5 Check valve controlled open via control spool
6 Free ow (without check valve use), version"A" and"B"
Characteristic curves
(measured with HLP46, ϑ
oil
=40 ±5°C, averages)
1
2
L2
80 44.5
19
2
40
24.5
7
4 x Ø5.4
L1 L1
F
1
F
2
F
4
F
3
G
A
A
P
T
B
B
5
4
63
0,01/100
[0.0004/4.0]
Rzmax 4
8/12 Z2S | Check valve
BoschRexrothAG, RE21548, edition: 2020-10
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 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 for locking pin
ISO8752-3x8-St, design "/60"or without locating hole)
3 Name plate
4 Through hole for valve mounting
5 Identical seal rings for portsA, B,P, T
6 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
Notice:
The length of the valve mounting screws of the sandwich plate
valve must be selected according to the components mounted
under and over the isolator valve.
Depending on the application, screw typeand tightening torque
must be adjusted to the circumstances.
Please ask Rexroth for screws with the required length.
"no code"
"SO40"
"SO60"
"SO55" "SO150"
„–“ "A" "B"
L1 11 21.5
1)
21.5
1)
21.5
1)
11 11 21.5
1)
21.5
L2 102 123 112.5 112.5 123
1)
Maximum dimension on the side of the check valve cartridge
Dimensions
(dimensions in mm)
Required surface quality of the valve
contact surface
Notice:
The dimensions are nominal dimensions which are subject to
tolerances.
Check valve | Z2S 9/12
RE21548, edition: 2020-10, Bosch Rexroth AG
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
▶ Hexagon socket head cap screw, metric/UNC Datasheet08936
▶ Hydraulic valves for industrial applications Datasheet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
BoschRexrothAG, RE21548, edition: 2020-10
10/12 Z2S | 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.
Notes
Check valve | Z2S 11/12
RE21548, edition: 2020-10, Bosch Rexroth AG
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.
Notes
BoschRexrothAG, RE21548, edition: 2020-10
12/12 Z2S | 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.
Notes