Bosch Rexroth R901152381 Sandwich Plate Check Valve

The Bosch Rexroth R901152381 Sandwich Plate Check Valve is a compact, direct-operated valve designed for sandwich‑plate installations in hydraulic systems, providing leak‑free blocking in one direction while allowing free flow in the opposite direction. This unit combines a straight‑through section (Z12 6 F) and an angled section (Z1S 6 B‑A) within a single sandwich‑plate package, with porting arranged according to ISO 4401‑03‑02‑0‑05 and a nominal size of 6. The poppet stroke is limited by a plastic socket, and a spring biases the poppet to the closed position when no fluid is flowing, ensuring a reliable seal when inactive. External seal rings, exchangeable to suit different hydraulic fluids, support compatibility and service life, while the blue plastic socket itself provides a sealing function and should not be removed or damaged. Stop and sealing functions are implemented via a plug screw, and the design permits linking or closing up to three internal channels depending on configuration. Measuring ports are available, and an optional throttle check variant can be requested to tailor flow characteristics for specific applications. This valve is suited to vertical stacking in modular plate systems and is designed for applications requiring precise one‑way control and compact, stackable valve arrangements.