The SEWON-YUKEN MPW-01 series (including models MPW-01-2-40 and MPW-01-4-4001) is a high-performance modular pilot-operated check valve, frequently utilized as a hydraulic lock. Engineered with dual pilot-operated check valves located in the A and B ports, this unit is specifically designed for securely holding double-acting cylinders in position and preventing actuator drift. It features a standard Size 01 (NG6 / CETOP 03 / 6 mm nominal) sandwich-mount interface with P, T, A, and B porting. This stacking type valve is designed to be seamlessly integrated between a directional control valve and a sub-plate. Manufactured by SEWON E & T Corp. in Korea to exacting Yuken design standards, it guarantees durable and reliable fluid control for industrial hydraulic systems.