Briefly describes the concept of pneumatic emergency cut-off valve

Pneumatic emergency cut-off valve, also known as the pneumatic ball valve, it is a kind of 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. Pneumatic emergency cut-off valve is a new type of gas pipeline engineering safety supporting device, mainly used in the following situations: 1, connected with combustible gas leakage monitoring instrument, the instrument is combustible gas leakage is detected, the main air valve automatically shut down, cut off the gas supply, in a timely manner to prevent malignant accidents. 2, and the limit temperature of heating equipment ( Pressure) Security controller connection, when the temperature of the equipment within the testing point ( Pressure) Exceed the set limit value, automatically shut down the air 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. Pneumatic emergency cut-off valve has good technical performance, low load loss and high reliability. Applicable to coal gas, natural gas and liquefied petroleum gas and other combustible gases, widely used in the gas pipe network system, gas heat factory workshop, gas boiler room and residential home security facilities. Functions and working principle of the valve, gas emergency shut-off valve is normally open type pulse trigger type solenoid valve, has the accident self-locking and manual reset function.