What is the pneumatic cut-off valve (pneumatic cut-off valve)? Pneumatic cut-off valve, also known as pneumatic cut-off valve, is composed of multi-spring pneumatic diaphragm actuator or floating piston actuator and regulating valve. It receives signals from regulating instruments and controls the fluid in the process pipe to be cut off, connected or switched. Has a simple structure, responsive, reliable and so on. In the automatic control system is widely used. According to the allowable pressure difference, medium characteristics and process pipe requirements, single seat, sleeve and tee can be used. According to the pressure conditions, the shut-off valves with nominal pressure PNl.6Mpa, PN4.0Mpa and PN6.4Mpa can be selected; According to the media anti-corrosion requirements and pressure levels, the choice of cast iron, cast steel, cast stainless steel, cast steel and other materials cut off valve; According to the medium temperature and special requirements, the choice of standard, high temperature cooling, low temperature, jacket insulation Type cut-off valve; According to media leakage and safety considerations, the choice of hard seal, soft seal, bellows seal off valve; According to process control requirements, can be equipped with the following accessories: hand wheel mechanism, air filter pressure reducer < Quick exhaust valve, solenoid valve, travel switch.