BOSCH REXROTH
R901281640

$1,152.14 USD

BOSCH REXROTH
Material:R901281640
Model:Z2S6-1-6X//60SO55

Quantity in stock: 0

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***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 Z2S6-1-6X//60SO55 (R901281640) is a sophisticated isolator valve designed for precise control in hydraulic systems. This releasable check valve, part of the ZS series, is engineered to enable leak-free blocking of one or two actuator ports even over extended periods of inactivity. Its sandwich plate design allows for easy integration into vertical stacking arrangements and is compatible with porting patterns according to DIN form A and ISO with locating hole. The model features a control spool and poppet mechanism that facilitates free flow in one direction (A to A or B to B) while securely blocking the opposite direction until released by the control spool movement. This functionality ensures that hydraulic fluid can flow freely when needed, while maintaining a solid block when required. The presence of preopening in this model provides damped decompression of pressurized liquid, effectively minimizing potential switching shocks that could otherwise cause premature wear or noise. This valve has been built to withstand maximum operating pressures and accommodate significant flow rates, ensuring reliable performance in demanding applications. It also offers various cracking pressures as per ordering codes and comes with optional check valve installation sets for added versatility. The Z2S6-1-6X//60SO55 is particularly valuable for applications requiring secure isolation without leakage, even during long periods of downtime. Its robust design and preopening feature make it suitable for systems where smooth operation and protection against pressure spikes are critical. Whether used individually or as part of a complex hydraulic circuit, this Bosch Rexroth isolator valve stands out for its reliability and advanced functionality.

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.

technical illustration-R901281640-Sandwich plate valve for use in vertical stackings Porting pattern according to DIN 24340 form A (without locating hole) Porting pattern according to ISO 4401-03-02-0-05 (with locating hole) For the leakage-free blocking of one or two actuator ports, optional Various cracking pressures, optional (see ordering codes) With pre-opening, optional Check valve installation sets available individually Special versions on request

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.

1	Control spool, area A2
2	Poppet, area A1
3	Stop

Type Z2S 6 A…SO40

Type Z2S 6 A…SO60

1	Control spool, area A2
2	Poppet, area A1
3	Stop
4	Control spool, area A4
5	Pre-opening, area A3

Type Z2S 6 -…SO55 (with pre-opening)

1) Corrosion-resistant surface on request: e.g."J50" thick film passivated (DIN 50979 Fe//Zn8//Cn//T0)

2) Locking pin ISO 8752-3x8-St, material no. R900005694 (separate order)

01	02	03	04		05		06	07	08	09	10
Z2S	6			–	6X	/					*

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
05	Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions)	6X
06	Surface without corrosion resistance 1)	no code
Seal material
07	NBR seals	no code
	FKM seals	V
	The selection is dependent on the operating parameters (hydraulic fluid, temperature, etc.)!
Locating hole
08		no code
	With locating hole	/60
	With locating hole and locking pin ISO 8752-3x8-St 2)	/62
Special version
09	Without special version	no code
	Control open by external port G1/4 (only version "A" and "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 "Symbols/Circuit diagrams"
10	Further details in the plain text	*

general

Size			6
Weight		kg	0.8
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +80
Ambient temperature range	FKM seals	°C	-20 … +80

hydraulic

Size			6
Maximum operating pressure		bar	315
Cracking pressure 1)		bar	1.5 / 3 / 6
Maximum flow		l/min	60
Direction of flow			see symbols
Hydraulic fluid			see table
Hydraulic fluid temperature range (NBR seals)		°C	-30 … +80
Hydraulic fluid temperature range (FKM seals)		°C	-20 … +80
Viscosity range		mm²/s	2.8 … 500
Maximum admissible degree of contamination of the hydraulic fluid 2)			Class 20/18/15 according to ISO 4406 (c)
Area ratio	Without pre-opening		A1/A2 ~ 1/3.5 (see sectional drawing)
	With pre-opening		A3/A2 ~ 1/12.5 (see sectional drawing)
	Version "SO60"		A1/A4 ~ 1/7 (see sectional drawing)

1)	in free direction
2)	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.

Selection of optimal sealing material also depends on the type of hydraulic fluid used.

For applications outside these parameters, please consult us!

Hydraulic fluid		Classification	Suitable sealing materials	Standards
Mineral oils		HL, HLP, HLPD	NBR, FKM	DIN 51524
Bio-degradable	Insoluble in water	HETG	NBR, FKM	VDMA 24568
	Insoluble in water	HEES	FKM	VDMA 24568
	Soluble in water	HEPG	FKM	VDMA 24568
Flame-resistant	Water-free	HFDU, HFDR	FKM	ISO 12922
Flame-resistant	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922
Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! The flash point of the hydraulic fluid used must be 40 K higher than the maximum solenoid surface temperature. Flame-resistant – containing water: Maximum operating pressure 210 bar Maximum hydraulic fluid temperature 60 °C Life cycle compared to operation with mineral oil HL, HLP 30 to 100 %

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

Δp-qV characteristic curves

Circuit example, schematic

①	component side
②	plate side

Type Z2S 6 A…

Type Z2S 6 -… and Z2S 6 -…SO55