ZQGP Pneumatic Quick Cut-off Valve is composed of a pneumatic multi-spring piston actuator and a low flow resistance, double sealing structure cut-off valve first introduced in China. The actuator has fast action speed, high thrust, self-resetting function and hand-operated mechanism, and the valve body has smooth flow path, large flow coefficient, elastic and rigid cascade double seals on the valve core seat. The novel and unique structure makes this product a new type of high-performance shut-off valve with fast action, tight shut-off, safety and reliability.