Qsky Precision Machinery Manufacturing Co., Ltd.

DN25LW Gas Solenoid Valve

DN25LW Gas Solenoid Valve

  • Features
  • Styles

DN25LW Gas Solenoid Valve Features

Working Principle of Gas Solenoid Valve

Solenoid gas control valve is a safety emergency cut-off device for gas pipeline. It can be connected with gas leak alarm system or with fire fighting and other intelligent alarm control terminal modules to realize on-site or remote automatic/manual emergency shut-off of gas source to ensure gas safety. When a harmful strong vibration occurs, the valve will automatically close.

Working principle:
1. When the solenoid coil is powered up, the solenoid valve opens. At this time, the input source of the magnetic switch contacts with the output open contact, the input source and the output are disconnected, and the coil keeps the electrified solenoid valve open. When the solenoid coil is powered off, the solenoid valve closes quickly, and the magnetic switch input source and output close contact are then closed. The input source and output switch contacts are then disconnected.

2. When the coil of solenoid valve is electrified, the natural gas solenoid valve is opened manually, and the gas solenoid valve is opened (the coil power consumption of automatic shut off solenoid valve is 20W, which can be electrified for a long time). The valve remains electrified for a long time. At this time, the input source of the magnetic switch is connected with the output open contact, the input source is disconnected from the output switch contact, and the solenoid valve closes quickly when the power is cut off or lost. When the magnetic switch input source and output switch contacts are connected, the input source and output open contacts are disconnected.

3. When the emergency shut off solenoid valve needs to be opened, it can be manually opened without being electrified, and the natural gas solenoid valve will remain open. At this time, the input source and output open contacts of the magnetic switch are connected, and the input source and output close contacts are disconnected. When the valve needs to be closed, the solenoid valve closes quickly after electrification (the coil of the solenoid valve cannot be electrified for a long time, and the electrification time is best for 10 seconds). In this case, the magnetic switch input source is connected with the output switch contact, and the input source and output are connected.


DN25LW Gas Solenoid Valve Styles

Sample of DN25LW Gas Solenoid Valve

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