SMC VHS401-04 Pneumatic Solenoid Valve Assembly

SMC VHS401-04 is a 3-port residual pressure relief hand valve in the VHS400 series, designed to isolate the supplied pressure in a pneumatic circuit and exhaust downstream pressure for maintenance. It uses Rc 1/2 (1/2 inch) port connections and is commonly mounted on panels or manifolds for quick access. The handle provides 90-degree switching action, enabling manual control without electrical actuation. The valve operates from 0.1 to 1.0 MPa and tolerates ambient temperatures from −5 to 60°C (no freezing). Weighing about 0.25 kg, VHS401-04 is suited for situations requiring safe isolation and venting during service or setup, such as bleeding residual pressure from downstream lines or isolating a pressurized actuator. This part is a member of SMC’s VHS family, which emphasizes a compact footprint and straightforward maintenance in automation and industrial pneumatic systems.