The Rexroth R901086090 Z1S6D05-41/V is a high-performance, pilot-operated check valve designed for vertical stacking assemblies. As a sandwich plate valve, it is engineered for the leak-free blocking of one or two actuator ports, making it ideal for applications requiring secure load holding, even during standstills. This valve allows free flow from A to A1 and B to B1 while blocking flow in the opposite direction. Pilot pressure from the opposing line can open the valve, allowing return flow. Manufactured by Bosch Rexroth, this component ensures reliability, precision, and durability in demanding hydraulic systems.