What Is a Gas Solenoid Valve?

The gas solenoid valve, also known as the gas emergency shut-off valve, is an actuator that is suitable for city gas, liquefied petroleum gas, natural gas and other gases to perform two-position on-off switching for heating and combustion medium pipelines for automatic temperature control. It is widely used in textile industry, printing industry, gas heat setting, glass and bulb industry, furnace heating and other industries' gas heating automatic control system.

Gas solenoid valve

The gas solenoid valve, also known as the gas emergency shut-off valve, is an actuator that is suitable for city gas, liquefied petroleum gas, natural gas and other gases to perform two-position on-off switching for heating and combustion medium pipelines for automatic temperature control. It is widely used in textile industry, printing industry, gas heat setting, glass and bulb industry, furnace heating and other industries' gas heating automatic control system.

Chinese name

Gas solenoid valve

Aka

Gas emergency shutoff valve

Suitable for

City gas, LPG

Function

Automatic temperature control

The gas solenoid valve is a safety emergency shutdown device for gas pipelines. It can be connected to a gas leak alarm system or to fire control and other intelligent alarm control terminal modules, etc., to achieve automatic or manual emergency shut-off of the gas source on site or remotely to ensure gas safety. The valve will close automatically when harmful strong vibration occurs. The valve opening must be manually intervened and manually opened to meet the safety management specifications and meet the characteristics of accident handling.

The explosion-proof performance of the solenoid valve complies with GB3836.1-2000, "Electrical Equipment for Explosive Gas Environment Part 1: General Requirements", GB3838.9-2006 "Electrical Equipment for Explosive Gas Environment Part 9: Pouring Type" m "" The regulations are made into a potted structure, the explosion-proof mark is Exmb || T4, suitable for use in factories with || A, || B, || C grades, T1 ~ T4 group of explosive gas or explosive gas mixture formed by steam and air Area 1 and 2 locations.

Applicable gas: natural gas; petroleum liquefied gas; artificial gas and other non-corrosive gases

Driving voltage: DC9V DC12V. (Pulse)

Body material: brass alloy

Drive current: <2A (pulse)

Seal material: NBR rubber

Valve closing time: less than 1 second

Working environment temperature: -10 + 50

1. Valve installation units shall have corresponding qualifications and be installed in accordance with relevant gas pipeline construction specifications.

2. The valve should be installed after the main inlet valve in the house for maintenance.

3. It should be installed in the direction of air flow indicated by the valve body. The valve body coil must not be upside down, allowing horizontal and vertical installation.

4. The solenoid valve control wire should be connected correctly and reliably. The control wire has polarity: the white wire is positive and the black wire is negative.

5. When the pipeline is purged, it is recommended to isolate the solenoid valve to prevent debris in the pipe from damaging the valve sealing material.

6. Before conducting pressure test to check the sealing performance of the pipeline, the solenoid valve should be opened.

7. When opening the valve manually, it should be operated when the pressure at the inlet and outlet of the valve is balanced.

8. When closing the valve electrically, do not connect it to the wrong power source, such as: wrong polarity, wrong voltage or prolonged power on, so as not to damage the electromagnetic coil.

working principle:

The first type: When the solenoid valve coil is energized, the solenoid valve is opened, at this time the input source of the magnetic switch is in contact with the output open contact, the input source is disconnected from the output close contact, and the coil remains energized. When the valve coil loses power, the solenoid valve closes quickly. At this time, the input source and the output close contact of the magnetic switch are connected, and the input source and the output close contact are disconnected.

The second type: After the solenoid valve coil is energized, manually open the solenoid valve, the solenoid valve opens, (the solenoid valve coil consumes 20W and can be energized for a long time), and the valve remains in a long-term energized state. The contact is connected, the input source is disconnected from the output close contact, and the solenoid valve is quickly closed when the power is cut or lost. At this time, the magnetic switch input source is connected to the output close contact, and the input source is disconnected from the output open contact.

The third type: when the solenoid valve needs to be opened, it is not energized, and it is manually opened to keep the valve open. At this time, the input source and the output open contact of the magnetic switch are connected, and the input source and the output close contact are disconnected. When the valve is turned on, the solenoid valve closes quickly after being energized (the valve coil cannot be energized for a long time, and the energization time is preferably within 10 seconds). At this time, the input source and output close contact of the magnetic switch are connected, and the input source and output.