Z2S22-1-51/V

The Z2S22-1-51/V valve belongs to the Z2S Check Valves series manufactured by Bosch Rexroth for hydraulic automation circuits that require precise flow control and positive shut-off. It provides leak-free blocking in channels A and B so actuators remain securely positioned when pressure is held. A maximum operating pressure of 315 bar allows the unit to function in high-pressure systems common in industrial presses and mobile equipment. The porting pattern ISO 4401-08-08-0-05 aligns the body with manifold blocks that follow this international interface, simplifying installation. Any installation position is permitted, giving designers freedom to orient the block as space permits. FKM sealing material is used to tolerate common hydraulic oils and elevated temperatures, extending service life. A required oil cleanliness of 20/18/15 per ISO 4406 prevents contamination-related wear inside the seat and poppet areas.

A maximum flow of 450 l/min lets the valve pass large volumes without excessive pressure loss, supporting rapid actuator movements. The cracking pressure is 3 bar in the free-flow direction, so the poppet lifts only after system pressure exceeds that level, protecting downstream components from unintended motion. NFPA pattern T3.5.1 R2-2002 D08 gives compatibility with North American sub-plates of the same size. Six ISO 4762 M12 mounting screws hold the body firmly to the manifold, and the plug screw must be tightened to 70 Nm to secure internal components. Mounting surface flatness of 0.01 mm per 100 mm span limits gaps that could create internal leakage, while a required surface roughness of Rzmax 4 ensures sealing edges mate properly.