The Rexroth Z2FS 6 B2-4X/2QV is a high-performance, pilot-operated check valve designed for vertical stacking assemblies. As a sandwich plate valve, it is engineered to be installed between a directional control valve and its subplate or manifold block. Its primary function is to provide leak-free blocking of flow in one direction in a hydraulic circuit, while allowing free flow in the opposite direction. The pilot-to-open feature enables the blocked flow to be released via a pilot pressure signal, offering precise control over actuator movement and load-holding applications. Built to Rexroth’s exacting standards, this valve ensures reliability and long service life in demanding industrial hydraulic systems.