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Z2S 22 B3-5X/V

Manufacturer: Bosch Rexroth

Material #: R978859136

Model : Z2S 22 B3-5X/V

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$1,509.00 USD

Availability: Backordered

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Delivered as early as December 24, 2026

This product is eligible for factory repair.

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Sandwich plate valve for use in vertical stackings Porting pattern according to ISO 4401-08-08-0-05 For the leakage-free blocking of one or two actuator ports, optional Various cracking pressures Pre-opening standard Check valve installation sets available individually Special versions on request

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, also in case of longer 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, the control spool (1) is moved in the direction of the B side, opens the ball seat valve (2) and then pushes the poppet (3) off its seat. Hydraulic fluid can now flow from B➁ to B➀.

In order to allow the ball seat valve (2) to be safely closed, the control spool (1) must be hydraulically unloaded (see circuit example).

Pre-opening

Due to the pre-opening, there is a damped decompression of the pressurized liquid. Thus, possible switching shocks are avoided. The two-stage set-up with an increased control open ratio means even low pilot pressure can be unloaded securely.

Type Z2S 22 ‒…

Type Z2S 22 A…

Type Z2S 22 ‒…SO40

Type Z2S 22 A…SO60

Circuit example, schematic

1	Control spool, area A2
2	Ball, area A3
3	Poppet, area A1
4	Stop
5	Control spool, area A4

①	component side
②	plate side

01	02	03	04		05		06	07	08	09
Z2S	22			–	5X	/				*

01	Check valve, Sandwich plate design	Z2S
02	Size 25	22
Leakage-free blocking
03	Channel A and B	–
	Channel A	A
	Channel B	B
Cracking pressure
04	3 bar	1
	5 bar	2
	7,5 bar	3
	10 bar	4
05	Component series 50 ... 59 (50 ... 59: unchanged technical data and pin assignment)	5X
06	Surface without corrosion resistance 1)	no code
Seal material
07	NBR seals	no code
	FKM seals	V
	Observe compatibility of seals with hydraulic fluid used.
Special version
08	Without	no code
	Control open by external port G1/4 (only version "A" and "B")	SO40
	Control spool unloaded to port T	SO60
09	Further details in the plain text	*

1)	Corrosion-resistant surface on request: e.g. "J50" thick film passivated (DIN 50979 Fe//Zn8//Cn//To)

general

Size			25
Weight		kg	12
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +80
Ambient temperature range	FKM seals	°C	-20 … +80

hydraulic

Size			25
Maximum operating pressure		bar	315
Cracking pressure (in free direction)			3 / 5 / 7.5 / 10 bar
Maximum flow		l/min	450
Direction of flow			see symbols
Hydraulic fluid			see table "Hydraulic fluid"
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	2.8 … 500
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1)			Class 20/18/15
Area ratio	With pre-opening		A3/A2 ~ 1/12.5 (see sectional drawing)
	Version "SO60"		A1/A4 ~ 1/9 (see sectional drawing)

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 the filters, see www.boschrexroth.com/filter.

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	NBR, FKM	ISO 15380	90221
		HEES	FKM
	Soluble in water	HEPG	FKM	ISO 15380
Flame-resistant	Water-free	HFDU	FKM	ISO 12922	90222
		HFDR	FKM
	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922	90223
Important information on hydraulic fluids: For more information and data on the use of other hydraulicfluids, 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. Flame-resistant - containing water: Maximum pressure differential per control edge 50 bar Pressure pre-loading at the tank port > 20 % of the pressure differential, otherwise increased cavitation Life cycle as compared to operation with mineral oil HL, HLP 50 … 100%. Bio-degradable and flame-resistant – containing water: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.

For applications outside these parameters, please consult us!

(measured with HLP46, ϑOil = 40 ±5 °C)

Δp-qV characteristic curves

①	component side
②	plate side

Examples

Version "A"

Version "-"

Version "B"

Version "A…SO40"

Version "A…SO60"

Dimensions in mm


Required surface quality of the valve contact surface

①	component side
②	plate side

1	Name plate
2	Through holes for valve mounting
3	Identical seal rings for ports A, B, P, and T
4	Identical seal rings for ports X, Y, L
5	Locking pins
6	Locating holes
7	Porting pattern according to ISO 4401-08-08-0-05
8	Plug screw SW46, tightening torque MA = 70 Nm

Type	Cracking pressure	Leakage-free blocking in channel	L1 in mm	L2 in mm
"no code"	1 + 2	"–"	14	14
	3 + 4	"–"	44	44
	1 + 2	A, B	14	14
	3 + 4	A	44	14
	3 + 4	B	14	44
"SO40"	1 + 2	A, B	14	14
	3 + 4	A	44	14
	3 + 4	B	14	44
"SO60"	1 + 2	A	14	14
	3 + 4	A	44	14
	3 + 4	B	14	44

Valve mounting screws (separate order)

Size	Quantity	Hexagon socket head cap screws	Material number
25	6	ISO 4762 - M12 10.9	-

Notice:

Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve.