The Bosch Rexroth SL 10 PA1-4X/M is a high-performance, pilot-operated check valve designed for subplate mounting. As a component of the SL series, it provides leak-free blocking of flow in one direction, with the ability to allow reverse flow when pilot pressure is applied. This size 10 (NG10) valve is engineered for reliability in demanding hydraulic systems, ensuring secure load-holding and preventing actuator drift. With a robust maximum operating pressure of 350 bar, it is suitable for a wide range of industrial applications. The “PA1” designation indicates that the check valve function is in port A, with a standard cracking pressure of 1 bar.