Bosch Rexroth R900517812 Z2FS-10-5-34 Throttle Check Valve

Bosch Rexroth R900517812 Z2FS-10-5-34 Throttle Check Valve is a size-10, sandwich-plate throttle check valve from the Z2FS family, designed to regulate hydraulic flow with precision in compact assemblies. It provides main- or pilot-flow limitation by throttling flow in one direction while allowing free return flow, enabling controlled actuator velocity in hydraulic circuits. Typically, Z2FS devices are installed between a directional valve and the subplate to enable velocity control in a compact footprint, and two identical valves can be mounted symmetrically to limit flow in one direction while permitting return flow in the opposite direction. The R900517812 designation identifies this specific configuration within Rexroth’s Z2FS lineup. Seals are offered in common elastomer materials, with NBR and FKM options typical for Z2FS devices, and certain variants provide improved corrosion protection; always verify material compatibility with the hydraulic fluid used.