Z2S Check Valves

The Bosch Rexroth Z2S Check Valves are pilot-operated check valves designed as sandwich plate valves for vertical stack mounting in hydraulic systems. The valve works by using a spring-loaded check valve cartridge to block flow in one direction while allowing free flow in the other. When hydraulic pressure is applied to a separate pilot port, it overcomes the spring force to shift the spool, thereby opening the flow path against the check direction. Their essential function is to provide leakage-free blocking of one or two actuator ports when the system is switched off or in an unpiloted state. This capability allows them to reliably hold hydraulic actuators in position for extended periods.