The pneumatic piston cut-off valve consists of a pneumatic multi-spring piston actuator and a cut-off valve with a low-flow-resistance, double-sealing structure, which is first introduced domestically. The actuator has the characteristics of fast action speed, large thrust, self-resetting function, and is equipped with a manual operating mechanism. The valve body has a smooth flow path, a large flow coefficient. The valve core and seat have elastic and rigid double-level double seals. The novel and unique structure makes this product a high-performance new type of cut-off valve with fast action, strict cut-off, safety and reliability.

This product has excellent performance, complete specifications, as well as advantages such as small size and light weight. It can meet the operational requirements of automatic rapid discharge and emergency cut-off in chemical, petroleum, metallurgical and other industrial departments during production processes. It is suitable for the safety protection systems of production processes and equipment, and is also applicable to general two-position control and switch operation occasions.