What is the basic function of a gas solenoid valve?

The gas solenoid valve is a safety emergency shut-off device for gas pipelines. It can be connected with the gas leakage alarm system or connected with the fire protection and other intelligent alarm control terminal modules, etc., to realize on-site or remote automatic manual emergency shut-off of gas source to ensure gas safety. In the event of a harmful strong vibration, the valve closes automatically.

The valve opening must be manually opened through manual intervention to meet the safety management specifications and meet the characteristics of accident handling.

Gas solenoid valve installation method:

1.The valve installation unit shall have the corresponding qualifications and install it in accordance with the relevant gas pipeline construction specifications.

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

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

4.The control line of the solenoid valve should be connected correctly and reliably, and the control line has polarity: the white wire is the positive pole and the black wire is the negative pole, which cannot be reversed.

5.When purging the pipeline, it is recommended to isolate the solenoid valve to avoid debris in the pipe damaging the valve sealing material.

6.Before the pipeline is tested for pressure testing and sealing performance, the solenoid valve should be opened first.

7.When opening the valve manually, it is advisable to operate when the pressure at the inlet and outlet of the valve is balanced.

8.When the electric valve is closed, do not connect the wrong power supply, such as: connect the wrong polarity, add the wrong voltage or power on for a long time, etc., 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 magnetic switch input source is in contact with the output open contact, the input source and the output off contact are disconnected, and the coil keeps the energized solenoid valve in the open state;When the solenoid valve coil loses power, the solenoid valve closes quickly, and the input source and output off contact of the magnetic switch are connected, and the input source and output off contact are disconnected.

The second kind: when the solenoid valve coil is energized, manually open the solenoid valve, the solenoid valve opens, (the solenoid valve coil power consumption is 20W, can be energized for a long time), the valve maintains a long-term energized state, at this time, the magnetic switch input source and the output open contact are connected, the input source and the output off contact are disconnected, and the solenoid valve is quickly closed when the power is out or lost, at this time, the magnetic switch input source and the output off contact are connected, and the input source and output open contact are disconnected.

The third kind: when the solenoid valve needs to be opened, it is not energized, and the valve is manually opened, and the valve is kept open, at this time, the magnetic switch input source and the output open contact are connected, and the input source and output are disconnectedWhen the valve needs to be closed, the solenoid valve is energized and closed quickly, (the valve coil can not be energized for a long time, and the energizing time is best within 10 seconds), at this time, the magnetic switch input source and output contact are connected, and the input source and output are connected.

Gas solenoid valve, also known as gas emergency shut-off valve. In our daily life, it is generally used in the heating and combustion medium pipelines of city gas, liquefied petroleum gas, natural gas and other gases, which play a two-position on-off switching role. To put it simply, it is a function of automatic temperature control.

In addition to being used in gas, natural gas and liquefied gas, it is also widely used in the heat setting control system of factory gas in the textile industry and printing industry.

The shut-off and switching function of the gas pipeline is convenient for electronic control.

The use of gas should be more safe for the solenoid valve to close, because the solenoid valve is manually controlled, and you can remind yourself to close the valve at any time. So it's better to be solenoid valves. Disadvantages of self-closing valves plexus scattering:

1) There is no reminder function (2) The self-closing valve is installed before the software pipe, and when the gas leakage occurs at the front end of the self-closing valve installation, the self-closing valve has no effect, and the electroosmotic magnetic valve or manipulator of the digging gas alarm is installed in front of the gas meter (behind some meters), and the alarm can shut off the total gas source! Thus the home is safe.

Gas solenoid valve is an important accessory, which is widely used in gas water heaters or gas stoves. And many people don't know much about gas solenoid valves, what is the working principle? When the gas solenoid valve fails, how should we fix the leak?

1. What is a gas solenoid valve?

Gas solenoid valve, also known as gas emergency shut-off valve, is generally used in natural gas and pipeline gas pipelines, and is a safety emergency device.

Second, the role of gas solenoid valve.

The gas solenoid valve can be connected to a gas leak alarm system or to other smart alarms. In case of danger, the valve will automatically close to protect our lives and property.

Third, the working principle of gas solenoid valve.

If it is used in a gas water heater, its main working principle is that after the cold water enters the water heater, under a certain pressure, it can push the valve, and the power supply can be turned on, the controller can be started, the electromagnetic valve of the gas water heater is opened, and the gas water heater is ignited and burned.

When the ignition fails, it will automatically close the solenoid valve and cut off the gas **. In this way, it is possible to save electricity and ensure the safety of use.

Fourth, if there is no electromagnetic valve, what is the harm?

When using a gas water heater, if there is no gas solenoid valve, the water will be ventilated, if the ignition delay occurs, the gas will fill the entire combustion chamber, and there may be gas leakage, which is easy to cause the danger of ** and cause safety accidents.

5. How to solve the failure of gas solenoid valve.

1. First of all, check the solenoid valve to see if there is anything blocked, if there is, it needs to be cleared.

2. If it doesn't work, then check to see if the battery is going to be replaced.

3. If it still doesn't work, it may be that the circuit board or solenoid valve is damaged. If you need to replace it with a new one, you must pay attention to ask a professional to check the safest repair.

The above is the working principle of the gas solenoid valve and how to solve the failure.

The gas self-closing valve is a kind of automatic control device, supported by a spring, and the valve stem drives the butterfly to rotate to adjust the flow rate.

The functions of gas self-closing valves are similar to those of solenoid valves, but compared with solenoid valves, gas self-closing valves have the following advantages:

1) Good stability: gas self-closing valve is a pneumatic valve, the valve element inside the beam is sealed opening and closing, the operation can be repeated, stable, without its "magnet" way to drive, can achieve self-closing control;

2) Strong diagnostic: its technical parameters are easier to diagnose than the solenoid valve, and its opening and closing are operated by gas activities, without additional kinetic energy equipment, eliminating the need for complex recommended operation steps of solenoid valve equipment;

3) Convenient construction: Because the gas self-closing valve is not as complex as the solenoid valve, it usually only takes a few steps to complete the operation, which simplifies the construction steps.

Gas solenoid valve, also known as gas emergency shut-off valve, is suitable for city gas, liquefied petroleum gas, natural gas and other gas for heating combustion medium pipeline to do two-position on-off switching, automatic temperature control of the actuator, it is widely used in the textile industry, printing industry gas heat setting and glass, bulb industry kiln heating and other industries of gas heating braking system.

The gas solenoid valve is a safety emergency switching device for natural gas pipelines, which can be connected with the gas leakage alarm system or fire and other intelligent alarm control terminal modules, etc., to achieve on-site or remote automatic manual emergency switching of the gas source, to ensure the safety of gas, when harmful strong vibration occurs, the valve will be automatically closed, and the valve must be opened manually after manual intervention

It can also be called a "solenoid valve".

It should be called an "emergency shut-off valve" or a gas alarm valve.

It is a normally open solenoid valve, the working principle is: the gas detector and the shut-off valve linkage, when the detector detects a certain concentration of combustible gas, it will send out a sound alarm, and at the same time give the shut-off valve a signal (the power supply of the solenoid valve), so that the solenoid valve closes the action, to quickly cut off the gas source, so as to ensure the safety of the user.

Gas solenoid valve is still familiar to most of our friends, gas solenoid valve is also called gas taboo shut-off valve, it is mainly used in city gas, natural gas and liquefied petroleum gas, in addition to gas solenoid valve is widely used in the textile industry, printing industry and gas qualitative industry, light bulb industry and so on. Generally, the gas solenoid valve is more suitable for gas, and its material is also very good, which belongs to NBR rubber. Moreover, the technology used in the gas solenoid valve is also very advanced, so let's talk about the knowledge of the gas solenoid valve.

Gas solenoid valve**

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

The working principle of gas solenoid valves

The cold water enters the water heater, flows through the water-gas linkage valve body, and under the action of a certain pressure difference of the flowing water, pushes the water-gas linkage valve, and pushes the micro switch to turn on the power supply and start the pulse controller, open the gas ventilation solenoid valve, and ignite the gas water heater to burn the burner; After the burner is ignited, the flame detection element gives a flame signal to the pulse controller by detecting the flame, and opens the solenoid valve by maintaining the current to maintain the normal combustion of the burner. If the ignition fails, the pulse igniter cannot maintain the normal opening of the solenoid valve because it does not detect the maintenance current signal of the flame, close the solenoid valve, and cut off the gas **.

The role of the solenoid valve of the gas water heater:

Clause. First, the solenoid valve plays the role of a water vapor linkage, water and electricity, ventilation, and double protection. The normal startup procedure to follow is:

The water is turned on first, and then the micro switch is started, the whole machine is energized, and then the ignition, after ignition for 1 3 seconds, the solenoid valve is engaged, ventilated, and burned. If the solenoid valve is lost, when the water is connected, that is, it is ventilated, and if the ignition is delayed, when the gas fills the combustion chamber, deflagration will occur, bringing potential safety hazards.

Second: the double protection of the water heater, that is, when the water pressure starts, the water film is affected by the water pressure, and at the same time, the power supply of the whole machine is turned on while pushing to the left, and at the same time, a spring top cover is also put on the top of the middle yard to the left. (This is another switch to control the air source), it is a mechanical action, if there is a residue in the water film, after the scale, if the water film is not in place, and you do not use the solenoid valve, it will leak and cause a safety accident.

The status of gas solenoid valve in our life has been higher, and its appearance has greatly improved the safety of our lives. And it also saved a lot of lives. The gas solenoid valve is actually a tool used to control the excessive concentration of gas in the air, which can lead to the danger of people's lives.

The work of the gas solenoid valve is also very simple, it is by sensing the external situation, and then making an adjustment to its own circuit to achieve a very good effect, which greatly reduces the safety risk of gas.

You can get it for free

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary due to a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affects the satisfaction and trust of the stove users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

If the valve is in a state of 90 degrees, it is open.

It is a kind of safety device and plays an important role in the safety precaution of gas pipelines. At the same time, the equipment also has a suction button, in the event of a danger alarm, this button can directly turn off the air supply, to prevent the occurrence of accidents. After the alarm is lifted, the extension handle can be used normally.

For gas solenoid valves, it is composed of coils, push rods and magnets, etc., and uses coils and currents to generate magnetism. In the absence of open flame burning, it can automatically isolate the gas to avoid gas poisoning. In the case of open flame burning, it can directly cut off the gas source to avoid **.

Precautions for installing natural gas solenoid valves

1. Before installation, you must carefully and carefully check the product instruction manual, and also check whether the product meets the relevant use requirements, be familiar with the key points of installation, and make sufficient preparations.

2. Before taking over, it is necessary to pay attention to the fact that the sealing material should not be used excessively, for example, when the thread is installed, it is necessary to maintain the pipeline within the effective length, and at the same time, the bottom half pitch should be chamfered with a file, and the sealing tape should be wound from the bottom of the two teeth, otherwise the excess sealing belt will enter the magnetic valve, resulting in an accident that hinders the normal operation.