Z2S16A2-5X/V

Manufacturer: Bosch Rexroth

Material #: R900427329

Model : Z2S16A2-5X/V

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth Z2S16A2-5X/V (R900427329) is a high-performance isolator valve designed for efficient hydraulic flow control in various applications. This releasable check valve, crafted for sandwich plate design, offers leak-free blocking of one or two actuator ports even during extended periods of non-use. It allows free flow in the direction from A to A or B to B, while effectively blocking flow in the opposite direction. The Z2S16A2-5X/V features a sophisticated mechanism where the control spool moves to open a ball seat valve and lift the poppet from its seat, enabling hydraulic fluid to flow from B to B when there is a flow in direction A to A. The valve's design ensures that it can be safely closed by hydraulically unloading the control spool, as illustrated in provided circuit examples. Incorporating preopening functionality, this valve provides damped decompression of pressurized liquid, mitigating potential switching shocks for smoother operation. Its two-stage setup with an increased control open ratio allows secure unloading even at low pilot pressures. The Z2S16A2-5X/V is versatile with several configurations available such as Types ZS A, ZS ASO, and more. It adheres to ISO porting patterns and can be integrated into vertical stackings seamlessly. The valve is engineered for various cracking pressures and comes with optional check valve installation sets sold individually. Moreover, it boasts a corrosion-protected design ensuring longevity and reliability. With a maximum operating pressure of up to several hundred bars and capable of handling significant maximum flow rates in liters per minute (l/min), this Bosch Rexroth isolator valve is an essential component for sophisticated hydraulic systems requiring precise fluid control and leak prevention under varying operational conditions.

$1,178.00 USD

More are expected on April 21, 2025

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Sandwich plate valve for use in vertical stackings Porting pattern according to ISO 4401-07-07-0-05 For the leakage-free blocking of one or two actuator ports, optional Various cracking pressures With pre-opening Check valve installation sets available individually Corrosion-protected design

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 16 ‒…

Type Z2S 16 A…

Type Z2S 16 A…SO40

Type Z2S 16 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	16			–	5X	/				*

01	Check valve, Sandwich plate design	Z2S
02	Size 16	16
Leakage-free blocking
03	In channel A and B	–
	In channel A	A
	In 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
Seal material
06	NBR seals	no code
	FKM seals	V
	Observe compatibility of seals with hydraulic fluid used. (Other seals upon request)
Corrosion resistance (outside; thick film passivated according to DIN 50979 Fe//Zn8//Cn//T0)
07	None (valve housing primed)	no code
07	Improved corrosion protection (240 h salt spray test according to EN ISO 9227)	J3
Special version
08	Standard	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	*

For applications outside these parameters, please consult us!

general

Size			16
Weight		kg	6.5
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +80
Ambient temperature range	FKM seals	°C	-20 … +80
MTTFD values according to EN ISO 13849		Years	150 1)

1)	For further details, see data sheet 08012

hydraulic

Size			16
Maximum operating pressure		bar	315
Cracking pressure (in free direction)			See characteristic curves
Maximum flow		l/min	300
Direction of flow			see symbols
Hydraulic fluid			see table "Hydraulic fluid"
Hydraulic fluid temperature range (at the valve working ports)	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 (see sectional drawing)
Area ratio	Version "SO60"		A1/A4 ~ 1/7 (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 1)	NBR, FKM	ISO 15380	90221
	Insoluble in water	HEES 1)	FKM	ISO 15380
	Soluble in water	HEPG 1)	FKM	ISO 15380
Flame-resistant	Water-free	HFDU (glycol base)	FKM	ISO 12922	90222
		HFDU (ester base) 1)	FKM
		HFDR	FKM
	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) 1)	NBR	ISO 12922	90223
Important information on hydraulic fluids: 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 210 bar, otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100%. Maximum hydraulic fluid temperature 60 °C Bio-degradable and flame-resistant – containing water: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.

1)	Not recommended for corrosion-protected version "J3" (contains zinc)

Notice:

Selection of optimal sealing material (see "Type code") also depends on the type of hydraulic fluid used.

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

Δp-qV characteristic curves

①	component side
②	plate side

Version "A"

Version "-"

Version "B"

Version "A…SO40"

Version "A…SO60"

Dimensions in mm


Required surface quality of the valve contact surface

Version	Cracking pressure in bar	Leakage-free blocking in channel	L1 in mm	L2 in mm
"no code"	3; 5	„–“	10	10
	7,5; 10	„–“	36,5	36,5
	3; 5	A	10	8,5
	3; 5	B	8,5	10
	7,5; 10	A	36,5	8,5
	7,5; 10	B	8,5	36,5
„SO40“	3; 5	A, B	10	10
	7,5; 10	A	36,5	10
	7,5; 10	B	10	36,5
„SO60“	3; 5	A	10	8,5
	3; 5	B	8,5	10
	7,5; 10	A	36,5	8,5
	7,5; 10	B	8,5	36,5

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 4401-07-0-05
8	Plug screw SW41, Tightening torque MA = 70 Nm

Valve mounting screws (separate order)

Size	Quantity	Hexagon socket head cap screws	Material number
16	4	ISO 4762 - M10 10.9	-
16	2	ISO 4762 - M6 10.9	-