Z2S-6 Check Valve

Isolator valve type Z2S is a pilot operated check valve of sandwich plate design. It is used for the leak-free closure of one or two actuator ports, even during longer periods of standstill.

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The oil can freely flow from A1 to A2 or B1 to B2, whereas in the opposite direction the flow is blocked. When fluid flows through the valve from A1 to A2 or B1 to B2, spool is pressurised and therefore shifted to the right or to the left, which causes poppet to be pushed off its seat.

Hydraulic fluid can now flow from B2 to B1 or from A2 to A1.To allow reliable closing of poppets, the actuator ports of the directional valve must be unloaded to tank in the central position.