The Rexroth SV 20 PB1-4X/ is a high-performance, pilot-operated check valve designed for reliable, leakage-free blocking of flow in one direction. As a key component in hydraulic systems, it allows free flow from port A to B while preventing reverse flow. The valve can be opened hydraulically via the pilot port X, permitting reverse flow for applications requiring controlled load-holding, such as in presses, lifting equipment, and clamping circuits. Engineered for subplate mounting, this size 20 valve is part of Rexroth’s proven SV series, ensuring robust performance and a long service life in demanding industrial environments.