1/8
Check valve,
pilot operated
Type Z2S
RE 21564/07.10
Replaces: 08.05
Table of contents Features
– Sandwich plate valve for use in vertical stackings
– Porting pattern according to ISO 4401-08-08-0-05 and
NFPA T3.5.1 R2-2002 D08
– For the leak-free blocking of one or two actuator ports,
optionally
– Different cracking pressures
– Pre-opening standard
– Check valve installation sets separately available
– Special versions upon request
– Amending documentation:
•"Sandwichplatessize25",datasheet48056
•"
Hydraulic fluids on a mineral oil basis
"
, data sheet 90220
Information on available spare parts:
www.boschrexroth.com/spc
Contents Page
Features 1
Ordering code 2
Symbols 2
Function, sections, circuit example 3, 4
Technical data 5
Characteristic curves 6
Unit dimensions 7, 8
Size25
Component series 5X
Maximum operating pressure 315 bar [4568 psi]
Maximum flow 450 l/min [118.9 US gpm]
H7685
Inhalt
Table of contents 1
Features 1
Ordering code 2
Symbols: Examples (① = component side, ② = plate side) 2
Function, sections, sample circuit 3
Function, sections 4
Technical data (For applications outside these parameters,
please consult us!) 5
Characteristic curves(measuredwithHLP46,ϑ
Oil
= 40 °C ± 5
°C [104 °F ± 9 °F]) 6
Unit dimensions (dimensions in mm [inch]) 7
Unit dimensions 8
2/8 Bosch Rexroth AG Hydraulics Z2S 22 RE 21564/07.10
Ordering code
Check valve, sandwich plate
Size25 = 22
Leak-free blocking in channel A and B = –
Leak-free blocking in channel A = A
Leak-free blocking in channel B = B
Cracking pressure
3 bar [43.5 psi] = 1
5 bar [72.5 psi] = 2
7.5 bar [108.8 psi] = 3
10 bar [145.0 psi] = 4
Component series 50 to 59 = 5X
(50 to 59: unchanged installation and connection dimensions)
Surface without corrosion resistance
1)
= no code
Further details in the plain text
Special version
no code = Without
SO40 = Control open by external port G1/4
(only version
"A" or "B")
SO60 = Control valve to “T” port
unloaded
Seal material
no code = NBR seals
V = FKM seals
Note!
The selection depends on the operating parameters
(fluid, temperature, etc.)!
Z2S 22 5X
*
1)
Corrosion-resistant surface upon request:
e.g."J50"thicklayerpassivated
(DIN 50979 Fe//Zn8//Cn//T0)
Type Z2S 22 A… Type Z2S 22 –…
PABT
2
1
XL Y
PABT
2
1
XL Y
Type Z2S 22 B…
PABT
2
1
XL Y
Type Z2S 22 A…SO40 Type Z2S 22 A…SO60
PABT
2
1
G1/4
XL Y
PABT
2
1
XL Y
Symbols: Examples (① = component side, ② = plate side)
PT
AB
1
2
A
B
A
B
1
2
3
1
2
2
A
B
A
B
1
2
1 4
Hydraulics Bosch Rexroth AGRE 21564/07.10 Z2S 22 3/8
Function, sections, sample circuit
The isolator valve Type Z2S is a releasable check valve in
sandwich plate design.
It is used for the leak-free blocking of one or two actuator
ports, also in case of longer standstill times.
InthedirectionA①toA②orB①toB②,thereisafreeflow,
in the opposite direction, the flow is blocked.
Ifthevalveis,forexample,flownthroughinthedirectionA①
toA②,thecontrolspool(1)ismovedinthedirectionBside,
opens the ball seat valve (2) and then pushes the poppet (3)
offitsseat.Now,hydraulicfluidcanflowfromB②toB①.
In order to allow for safe closing of the ball seat valve (2), the
control spool (1) must be hydraulically unloaded (see circuit
example).
Pre-opening
– Due to the two-stage structure with enlarged control
open ratio, safe unloading is also possible with lower pilot
pressure.
– Avoidance of switching shocks due to dampened decom-
pression of the pressure volume on the actuator side.
Type Z2S 22 –…
Type Z2S 22 A…
①=componentside
②=plateside
1 Control spool,
area A
2
2 Ball, area A
3
3 Poppet, area A
1
4 Stop
Circuit example,
schematic
A
B
A
B
1
2
1 423
T
5
A
B
A
B
1 4
G1/4
1
2
23
4/8 Bosch Rexroth AG Hydraulics Z2S 22 RE 21564/07.10
Function, sections
Type Z2S 22 A…SO60
①=componentside
②=plateside
1 Control spool,
area A
2
2 Ball, area A
3
3 Poppet, area A
1
4 Stop
5 Control spool,
area A
4
Type Z2S 22 –…SO40
Hydraulics Bosch Rexroth AGRE 21564/07.10 Z2S 22 5/8
Technical data (For applications outside these parameters, please consult us!)
hydraulic
Maximum operating pressure
bar [psi] 315 [4568]
Cracking pressure in free direction Seecharacteristiccurvespage6
Maximum flow
l/min [US gpm] 450 [118.9]
Direction of flow See symbols page 2
Hydraulic fluid – On mineral oil basis and related hydrocarbons
(HL, HLP, HVLP, HVLPD, etc.) according
to DIN 51524
– Flame-resistant (HFC, HFDU, HFDR) according
to ISO 12922
1)
– Environmentally compatible (HETG, HEES, HEPG,
HEPR) according to ISO 15380
1)
Other hydraulic fluids upon request
Hydraulic fluid temperature range
(at the valve working ports)
°C [°F] –30 to +80 [–22 to +176] (NBR seals)
–20 to +80 [–4 to +176] (FKM seals)
Viscosity range
mm
2
/s [SUS] 2.8 to 500 [35 to 2320]
Maximum permitted degree of contamination of the hydraulic
fluid-cleanlinessclassaccordingtoISO4406(c)
Class 20/18/15
2)
Area ratio – with pre-opening A
3
/A
2
~ 1/12.5 (see sectional drawing pages 3 and 4)
–Version"SO60" A
1
/A
4
~ 1/9 (see sectional drawing page 4)
general
Weight
kg [lbs] Approx. 12 [26.5]
Installation position Any
Ambient temperature range
°C [°F] –30 to +80 [–22 to +176] (NBR seals)
–20 to +80 [–4 to +176] (FKM seals)
1)
When using flame-resistant or environmentally compatible
hydraulic fluids, restrictions with regard to the technical
data may be applicable (temperature, pressure range, life
time, maintenance intervals, etc.).
2)
The cleanliness classes specified for the components must
be adhered to in hydraulic systems. Effective filtration pre-
vents faults and at the same time increases the service life
of the components.
For the selection of the filters see
www.boschrexroth.com/filter.
Note!
Selection of the perfect sealing material (see ordering code
page 2) also depends on the hydraulic fluid used.
50 100 150 200 250 300
5
10
15
20
30
4
2
1
5
6
0
[0]
[10] [20] [40][30] [118.9]
0
[435]
[0]
[50]
[100]
[150]
[200]
[250]
[60][50]
[400]
25
[70]
[300]
[350]
3
350 400 450
[80] [90] [100]
7
6/8 Bosch Rexroth AG Hydraulics Z2S 22 RE 21564/07.10
Characteristic curves(measuredwithHLP46,ϑ
Oil
= 40 °C ± 5 °C [104 °F ± 9 °F])
Flow in l/min [US] gpm] →
Pressure differential in bar [psi] →
∆p-q
V
characteristic curves
Cracking pressure:
1
3 bar [43.5 psi]
2
5 bar [72.5 psi]
3
7.5 bar [108.8 psi]
4
10 bar [145.0 psi]
5 Freeflow(withoutcheckvalveuse),version"A"or"B"
6 Only housing
7 Check valve controlled open via control spool
1,2,3,4
2
1
0,01/100
[0.0004/4.0]
Rz1max 4
212
P
117
T
Y
59
100
4
B
A
T
Y
F1
F2
F3
F4
F5
F6
G1
G2
L
X
12,5
28,4
6 x 14
L1 L2
[8.35]
1
2
1
4
36
2
5
8
7
2
[0.079]
[1.12]
[0.49]
[4.61]
[Ø0.55]
[0.16] [3.94]
[2.32]
Hydraulics Bosch Rexroth AGRE 21564/07.10 Z2S 22 7/8
Unit dimensions (dimensions in mm [inch])
Required surface quality of the
valve mounting face
Special version Cracking pressure leak-free blocking in
channel
L1 in mm [inch] L2 in mm [inch]
"No code" 1 + 2 "–"
14 [0.55] 14 [0.55]
3 + 4 "–"
44 [1.73] 44 [1.73]
1 + 2 A, B
14 [0.55] 14 [0.55]
3 + 4
A
44 [1.73] 14 [0.55]
B
14 [0.55] 44 [1.73]
"SO40" 1 + 2 A, B
14 [0.55] 14 [0.55]
3 + 4
A
44 [1.73] 14 [0.55]
B
14 [0.55] 44 [1.73]
"SO60" 1 + 2 A, B
14 [0.55] 14 [0.55]
3 + 4
A
44 [1.73] 14 [0.55]
B
14 [0.55] 44 [1.73]
① component side
② plate side
Item explanations and valve mounting screws see page 8.
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 state-
ments concerning a certain condition or suitability for a certain applica-
tion 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.
8/8 Bosch Rexroth AG Hydraulics Z2S 22 RE 21564/07.10
1 Name plate
2 Through hole for valve mounting
3 Identical seal rings for ports A, B, P, T
4 Identical seal rings for ports X, Y, L
5 Locating pins
6 Locating holes
7 Porting pattern according to ISO 4401-08-08-0-05
and NFPA T3.5.1 R2-2002 D08
8 PlugscrewSW46,
tightening torque M
A
= 70 Nm [51.6 ft-lbs]
Valve mounting screws (separate order)
6 hexagon socket head cap screws ISO 4762 - M12 - 10.9
6 hexagon socket head cap screws 1/2”-13 UNC
Note!
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.
Unit dimensions