The YUKEN MPW-01-4-40 is a high-performance pilot-operated check valve designed for modular hydraulic systems. This valve allows free flow in one direction while blocking flow in the opposite direction, reliably holding an actuator in a fixed position. The check function can be overridden by applying pilot pressure, which opens the valve to permit reverse flow. As part of Yuken’s modular valve series, the MPW-01-4-40 can be stacked with other NG6 (CETOP 3) size valves, such as solenoid directional valves, to create compact, integrated hydraulic circuits. This design minimizes piping, reduces potential leak points, and simplifies system assembly and maintenance. It is ideal for applications requiring secure load-holding, such as in machine tools, industrial presses, and material handling equipment.