What is a cut-off valve? What are the main applications?

Cut-off valve is an actuator in automation system, which consists of multi-spring pneumatic diaphragm actuator or floating piston actuator and regulating valve. It receives the signal of the regulating instrument and controls the cutting, connecting or switching of the fluid in the process pipeline. It has the characteristics of simple structure, sensitive response and reliable action. Can be widely used in petroleum, chemical industry, metallurgy and other industrial production departments. The air source of pneumatic cut-off valve requires filtered compressed air, and the medium flowing through the valve body should be liquid and gas without impurities and particles. According to the allowable pressure difference, medium characteristics and process pipeline requirements, single seat, sleeve and three-way block valves can be selected.

Globe valves are mainly used for the following occasions:

1, connect the combustible gas leakage monitoring instrument. When the instrument detects combustible gas leakage, it will automatically and quickly close the main gas supply valve and cut off the gas supply, so as to stop the occurrence of vicious accidents in time.

2. It is connected with the limit temperature and pressure safety controller of thermal equipment. When the temperature and pressure of the detection point in the equipment exceed the set limit value, the gas supply valve will automatically close quickly and stop the fuel supply.

3. Connect with the central fire alarm system of high-rise building, and automatically cut off the gas supply in the building to prevent gas explosion in case of fire in the building.

4. Set ZCR gas emergency cut-off valve in the gas supply pipe network of the city or factory, which can be controlled centrally in the central control room, and the pipeline gas supply at the accident site can be closed remotely and urgently.