Matters needing attention and occasions of pneumatic shut-off valve

Pneumatic shut-off valve is a new safety supporting device for gas pipeline engineering, which is mainly connected with combustible gas leakage monitoring instrument. When the instrument detects gas leakage of combustible stainless steel insulation stop valve, it automatically and quickly closes the main gas supply valve, cuts off the gas supply, and timely stops the occurrence of malignant accidents; Connected with the limit temperature (pressure) safety controller of thermal equipment, when the temperature (pressure) of the detection point in the equipment exceeds the set limit value, the air supply valve will be automatically and quickly closed to stop the fuel supply; Connected with the central fire alarm system of high-rise buildings, when the building is in fire, the gas supply in the building will be cut off automatically to prevent the gas explosion; ZCR gas emergency shut-off valve is set in the gas supply network of the city or factory, which can be controlled centrally in the central control room and the pipeline gas supply on the accident site can be closed remotely and remotely.

Pneumatic shut-off valve is one of the actuator in the automation system, which can be widely used in the petroleum, chemical, metallurgical and other industrial production departments. The air source of pneumatic shut-off valve requires filtered compressed air. The medium flowing through the valve body shall be liquid and gas without impurities and particles.

Precautions for the use of pneumatic shut-off valve:

1. the pneumatic shut-off valve is in the normally open state in daily work, and the solenoid valve coil is in the power off state, and does not consume electric energy.

2. when the accident occurs, the valve coil of pneumatic shut-off valve is powered on momentarily, triggering the valve to close quickly and enter the self-locking state. At this time, even if the power supply is removed, the pneumatic shut-off valve is still in self-locking state and will not be opened automatically again.

3. the pneumatic shut-off valve adopts pilot valve disc, which is easy to open. Even if the pressure reaches 6bar, it is very easy to open. The diameter is larger than DN125. Lever handle is adopted to make the valve reach the switch force saving and fast.

4. when the staff have finished handling the accident, the valve will be opened manually before the air supply can be restored.