QDQ421F pneumatic emergency shut-off valve

1、 Purpose and performance specifications of pneumatic emergency shut-off valve:

This valve is a safety protection valve installed on liquefied petroleum gas (gas), liquid phase and gas phase pipelines, and is used in conjunction with remote gas sources,Pneumatic emergency shut-off valveUsing gas source to control the opening and closing of valves, in order to quickly and manually relieve the pressure of the gas source in case of a large amount of leakage or even fire on the pipeline or storage tank, or when the high temperature is ≥ 75% p5C%% D, the melting alloy melts, and the cylinder automatically relieves the pressure. The valve quickly closes to stop the leakage, providing safety protection.

2、 Working principle of pneumatic emergency shut-off valve electronic control

Pneumatic emergency shut-off valveThe air source inlet of this valve is equipped with a two position three-way solenoid valve, and the valve switch is controlled by a remote electrical control console.

1. The gas leak alarm is powered on, the solenoid valve is powered on for exhaust, and the valve automatically closes

2. Manually control the solenoid valve (press the red clip) to exhaust, and the valve will automatically close

3： Main performance specifications for pneumatic emergency shut-off valve