Z2S22-1-5X/V

The Z2S22-1-5X/V valve belongs to the Z2S Check Valves series from Bosch Rexroth and works as a pilot-operated check valve in hydraulic automation systems that must lock pressure in both actuator lines. It is supplied in size 25 to match ISO 08 subplates, and the sandwich plate mounting style lets it be stacked directly between directional valves and the manifold without external piping. The ISO 4401-08-08-0-05 porting pattern aligns the pressure galleries, while the NFPA T3.5.1 R2-2002 D08 interface keeps the unit interchangeable with North American plates. Free flow occurs from A1 to A2 and B1 to B2, and leakage-free blocking on ports A and B prevents cylinder drift when the pilot signal is absent. The valve can be installed in any position, so designers can orient the manifold vertically or horizontally. A standard pre-opening feature allows a small pressure equalization to minimize switching shock, and FKM seals maintain compatibility with mineral oils and many synthetic fluids.

The unit withstands a maximum operating pressure of 315 bar, enabling service in high-pressure mobile or industrial circuits. Its flow capacity reaches 450 l/min, so large-bore cylinders can retract and extend without excessive restriction. A cracking pressure of 3 bar ensures the poppet lifts only when the pilot line or differential pressure exceeds that value, which stabilizes loaded actuators. Hydraulic cleanliness must be maintained at ISO 4406 20/18/15 or better to protect the seat and pilot passages from wear. The unpacked weight of 13.9 kg indicates the valve’s robust iron housing and should be considered when sizing manifold supports. Together, these characteristics define a compact component that locks loads, limits backflow, and handles substantial flow rates under demanding pressure conditions.