Product Overview
The piston-type pneumatic three-way shut-off valve consists of a ZS-type spring piston actuator and a shut-off valve. It is compact and lightweight, provides rapid and reliable shut-off, and has a large allowable differential pressure. As an actuator in automatic control systems, it accepts two-position control instruments, PC programmable controllers, and electrical "ON-OFF" switching signals to cut off, open, or change the direction of media flow, achieving two-position control of process parameters. It is suitable for emergency shut-off and automatic protection interlocking systems for venting process pipelines. This series of products includes diaphragm and piston types. Valve body structures include single-seat, sleeve, and double-seat (two-position three-way) types, and sealing methods include packing seal and bellows seal. It features simple structure, high operating force, small size, light weight, low flow resistance, large valve capacity, good sealing performance, and convenient maintenance. It is suitable for gaseous and liquid media without particulate matter or impurities, and for automatic control systems requiring rapid and tight shut-off and rapid venting. It is widely used in automatic control systems in petroleum, chemical, metallurgical, power, and textile production processes.
Main connection dimensions
