Bosch Rexroth | Z1S10B05-2-4XF
Z1S10B05-2-4X/F
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The Z1S10B05-2-4X/F check valve is produced by Bosch Rexroth within the Z1S Check Valves series. It is used in hydraulic automation to allow flow in one direction while blocking reverse flow in stack-mounted circuits. The valve is configured for channel B so it provides reverse-flow blocking only on that line in a sandwich assembly. A nominal size of 10 establishes the interface dimensions and determines the flow area in common CETOP 05 manifolds. The NFPA D05 mounting pattern together with the ISO 4401-05-04-0-05 porting layout allows direct installation between standard subplates and directional valves. Flow enters on the plate side labeled 1 and exits on port 2, which simplifies piping because the check function is built into the stack. A cracking pressure of 0.5 bar ensures the poppet opens with minimal upstream pressure, reducing energy loss, and the valve withstands operating pressures up to 350 bar for use under high-pressure directional valves in industrial presses.
Maximum flow capability is 100 l/min, enabling the unit to serve medium-sized actuators without excessive pressure drop. FKM seals are fitted to resist mineral oils and elevated temperatures commonly found in power units. The valve can be mounted in any orientation, giving designers flexibility when arranging manifold blocks. System cleanliness must be maintained at ISO 4406 class 20/18/15 to protect the poppet seat from contamination that could cause leakage. Tank ports Ta and Tb are free-flowing so return oil is not restricted by the sandwich plate. Four M6 ISO 4762 grade 10.9 screws secure the stack to maintain gasket compression under dynamic loads. There are no measuring ports, pilot oil ports, or additional nozzles, eliminating extra connections and reducing potential leak paths.
Technical Specifications
Check Valve Channel
B
Cleanliness Class
ISO 4406 20/18/15
Cracking Pressure
0.5 bar
Installation Direction
Plate Side (1→2)
Installation Position
Any
Max Flow
100 l/min
Max Operating Pressure
350 bar
Measuring Ports
None
Mounting Pattern (nfpa)
D05
Mounting Screws
4x M6 ISO 4762 10.9
Nominal Size
10
Nozzle Option
None
Pilot Oil Ports
None
Porting Pattern (iso)
4401-05-04-0-05
Seal Material
FKM
Tank Ports Ta/tb
Free-Flowing
1620 Old Apex Road
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