Gas shut-off solenoid valves, also known as gas safety shut off solenoid valves and gas emergency shut off solenoid valves, are emergency shutoff devices for gas pipelines. They can be connected to gas leakage detection and alarm systems, or to fire and other alarm control terminal modules, etc. to achieve remote automatic or on-site manual cutting off of gas source.
1. Gas Alarm + Gas Shut-Off Solenoid Valve
1.1 Gas Alarm Basics
After the gas alarm (gas detector, or gas leak detector) is powered on, it can monitor the gas concentration in the house 24 hours a day. When the gas concentration in the house exceeds the preset value, it will immediately make a harsh sound and flash a red light to attract the user's attention and remind him to dilute the gas concentration in the house by opening windows, closing gas valves and other measures.
Some gas alarms can also be linked to the valves on the gas pipelines. When a gas leak occurs, they will not only alarm immediately, but also cut off the gas source to avoid continued gas leakage.
The valve mentioned above that can be linked to the gas safety alarm is the gas shut-off solenoid valve.
1.2 Gas Shut-Off Solenoid Valve Basics
The gas shut-off solenoid valve is a new type of safety supporting device for gas pipeline engineering. When the alarm detects a leak of combustible gas, it will make the main gas supply valve (gas shut-off solenoid valve) automatically and quickly close, thereby cutting off the supply of gas and preventing the occurrence of vicious accidents in time. The gas shut-off solenoid valve can effectively protect the safety of household gas, so it is necessary to install it in the home.
2. Working Principle of Gas Shut-Off Solenoid Valve
The gas shut-off solenoid valve mainly achieves the cutting off of gas through signal control. Its specific working principle is as follows:
1. Detection: The gas shut-off solenoid valve is equipped with a gas leak detector. Once a gas leak is detected, the detector will transmit the sensed signal to the control system.
2. Control: After the control system receives the leak signal, it will process it and determine whether it is necessary to cut off the gas supply. If it is necessary to cut off, the control system will issue corresponding instructions.
3. Cut-off: After receiving the cut-off command, the gas shut-off solenoid valve will quickly close to prevent the continued flow of gas.
4. Alarm: At the same time, the alarm system will also be triggered, such as making a sound or flashing a warning light to remind users of the occurrence of gas leakage.
In short, the gas shut-off solenoid valve ensures the safety of the gas pipeline system and avoids potential accidents by gas leakage signal detection, valve actuation and alarm system triggering.
3. Applications of Gas Shut-Off Solenoid Valve
The gas shut-off solenoid valve has excellent technical performance, low load loss and high safety. It is suitable for flammable gases, such as gas, natural gas, liquefied petroleum gas, and biogas. Its main applications are as follows:
1. Connected to the combustible gas leakage detection instrument or the overall fire protection system, it will automatically and quickly close the main gas supply valve, cut off the gas supply, and promptly stop the vicious accident to happen when the instrument detects combustible gas leakage or other alarm signals that require cutting off the gas source.
2. Connected to the limit temperature (pressure) safety controller of the thermal equipment, it will automatically close the gas supply valve and stop the gas supply when the temperature or pressure at the detection point in the equipment exceeds the set limit value.
3. Connected to the central fire alarm system of high-rise buildings, it will automatically cut off the gas supply in the building to prevent gas explosions when a fire occurs in the building,
4. Install this series of gas quick cut-off valves in the gas supply pipeline network of cities or factories, you can centrally control the valve in the central control room and remotely shut down the pipeline gas supply at the accident site.
5. Cut off the gas when inspecting and troubleshooting the gas pipeline system.
4. FAQs About Gas Shutoff Solenoid Valve
4.1 How to Reset the Gas Shut-off Solenoid Valve?
When gas leakage or other problems occur, the gas shut-off solenoid valve will automatically cut off the gas. So how to reset the gas shut-off solenoid valve?
Just pull the red button on the solenoid valve up until you hear a sound to reset it. After that, you can switch on the fire button to see if the gas supply returns to normal.
4.2 Is It Necessary to Install a Gas Shut-Off Solenoid Valve?
Installing a gas shut-off solenoid valve is highly recommended for safety. These valves automatically stop gas flow in case of emergencies like leaks or malfunctions, minimizing the risk of fire or explosions. They offer peace of mind and comply with many building codes and regulations. Though not legally mandated everywhere, their installation is a proactive measure to safeguard lives and property.
4.3 Where Is the Gas Shut-Off Solenoid Valve Located?
Its location is very easy to find. It is on the pipe around the gas meter. When a gas leak occurs indoors or the gas concentration exceeds the set range, it will automatically cut off the gas. After the user troubleshoots the problem and then can manually operate it to return to normal.
5. Conclusion
As a type of gas safety equipment, gas shut-off solenoid valves have good application prospects and research value. It can ensure the personal safety and property safety of users in the event of gas leakage, and can also reduce the probability of gas accidents.
