The function of gas solenoid valve, the working principle of gas solenoid valve

The function of gas solenoid valve< /span>

Gas solenoid valve, also known as gas emergency shut-off valve, is It is suitable for switching on and off the heating and combustion medium pipelines of city gas, liquefied petroleum gas, natural gas and other gases. It is widely used in gas heat setting in the textile and printing industries, kiln heating in the glass and light bulb industries, and gas heating automatic control systems in other industries.

GasSolenoid valve is a safety emergency shut-off device for gas pipelines. It can be connected to the gas leakage alarm system or to fire protection and other intelligent alarm control terminal modules to achieve on-site or remote automatic/manual emergency cut off of the gas source to ensure gas safety. When harmful strong vibration occurs, the valve will automatically close. Opening the valve requires manual intervention and manual opening, which meets safety management regulations and meets accident handling characteristics.

Working principle of gas solenoid valve

The first type: when the solenoid valve coil is energized, the solenoid valve opens, and at this time the input source of the magnetic switch contacts the output open contact , the input source and the output OFF contact are disconnected, and the coil remains energized. The solenoid valve is in the open state;when the solenoid valve coil loses power, the solenoid valve closes quickly. At this time, the input source of the magnetic switch and the output OFF contact are connected, and the input source and the output OFF contact are connected. The output OFF contact is open.

The second type: when the solenoid valve coil is energized, manually open the solenoid valve and the solenoid valve opens (the solenoid valve coil has a power consumption of 20W and can be energized for a long time). The valve remains energized for a long time. At this time, the input source and output of the magnetic switch When the open contact is connected, the input source and the output close contact are disconnected. When there is a power outage or power loss, the solenoid valve is quickly closed. At this time, the input source of the magnetic switch is connected to the output close contact, and the input source and the output open contact are disconnected.

Third type: When the solenoid valve needs to be opened, de-energize and manually pull it open, the valve will remain open. At this time, the input source of the magnetic switch and the output open contact are connected, and the input source and output close contact are disconnected;when needed When closing the valve, the solenoid valve closes quickly after being energized (this valve coil cannot be energized for a long time, and the energization time is best within 10 seconds). At this time, the input source and output close contacts of the magnetic switch are connected, and the input source and output are connected.

Gas solenoid valve installation precautions

1. The valve installation unit should have corresponding qualifications and install according to relevant gas pipeline construction specifications.

2. The valve should be installed at the main indoor behind the intake valve for easy maintenance.

3. The air flow direction should be followed as indicated on the valve body. During installation, the valve body coil must not be inverted, and horizontal and vertical installation is allowed.

4. The solenoid valve control line should be connected correctly and reliably .

5. When purging the pipeline, it is recommended to < a href="https://www.diancifa.cc/diancifa/" target="_blank" title="Solenoid Valve">Solenoid valve Isolate to prevent debris in the pipe from damaging the valve sealing material.

6. The pipeline is undergoing a pressure test to check the sealing performance Before operating, the solenoid valve should be in the open state.

7. When opening the valve manually, the valve should be Operate when the inlet and outlet pressures are balanced.

8. When closing the valve electrically, be sure to avoid incorrect connections. Power supply, such as connecting with wrong polarity, applying wrong voltage, or powering on for a long time, etc., to avoid damaging the electromagnetic coil.

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