Shut-off valve is mainly used for what occasion?

Cut-off valve is one of the automation system of actuators, pneumatic diaphragm actuator by a more spring or floating piston actuators and pneumatic control valve, the reception of the regulating instrument signal, fluid control technology of the pipe on the cut, or switch. It has a simple structure, sensitive reaction, reliable operation, etc. Can be widely used in petroleum, chemical, metallurgical and other industrial production. Pneumatic cut-off valve of air required by the compressed air filter, flowing through the valve body is supposed to be free of impurities and particles of the medium of liquid and gas. According to allow the pressure differential, medium characteristics and process piping requirements, can choose single seat, sleeve, tee cut-off valve. Is mainly used in the following situations: 1, connected with combustible gas leakage monitoring instrument, the instrument to detect combustible gas leakage, the main air valve automatically shut down, cut off the gas supply, in a timely manner to prevent malignant accidents. 2, and the limit of thermal equipment, temperature and pressure safety controller connection when the temperature of the equipment within the testing point pressure exceeds the limit of the set value, automatic quick close the gas supply valve, stop the supply of fuel. 3, and in the middle of the high-rise building fire alarm system, when building fire, cut off the gas inside the building, to prevent the occurrence of gas explosion. 4, or factory in the city gas supply network ZCR gas emergency shut-off valve is installed inside, can be in the central control room centralized control, emergency shut down the scene of the accident of pipeline gas supply remote control.