Self-operated safety shut-off valve
Self-operated safety shut-off valve is a kind of safety emergency shut-off valve. Because of its excellent technical performance, small piezoresistance and high reliability, it is suitable for natural gas, city gas, liquefied petroleum gas and other combustible gases. It is widely used for supply. Air pipe network control system, gas boiler room and other security systems. If it is connected with the flammable gas leakage monitoring device, when the instrument detects the leakage of flammable gas, it sends a pulse voltage signal to the electromagnetic coil, and automatically cuts off the gas supply of the gas supply valve to prevent the occurrence of a malignant accident.
The self-operated safety shut-off valve is in the normally open position during normal operation. At this time, the solenoid valve is in the power-off state and does not consume electric energy. When the accident occurs, the valve coil is energized instantaneously and can trigger the quick closing of the valve, and then enters the self-locking state. . At this time, even if the power supply is removed, the valve is still in the self-locking closed state, and there is no re-automatic opening phenomenon. Only when the operator has finished the accident, the valve can be manually re-opened to restore the air supply. If the storage module is installed, it can also be automatically discharged to unlock the valve in the de-energized state.