Gas shut-off valve: device and electromagnetic variety

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

Today, a variety of technological processes are used almost everywhere and constantly. Naturally, sometimes emergencies arise when immediate intervention is required. For such cases, people have developed a variety of devices, and one of them is a gas shut-off valve.

Purpose of the device

The described valve is designed to immediately turn off the device, part of the pipeline or the entire system in the event of an emergency.

The solenoid gas cut-off valve, which is installed in both gas and water environments, is activated due to the influence of external energy sources on it. This is precisely the main difference from all other protective and shut-off types of valves. The device is put into operation by a number of sensors, and in addition, it can be controlled remotely. As for the areas of application of gas shut-off valves, there are a lot of them. They are successfully used in the medical and food industries, well shownyourself in the energy sector, as well as in everyday life.

You can even single out some designs and devices that cannot function normally without such cutoffs.

Firstly, this includes all heating and water supply systems. In this case, the valve will shut off the supply of working fluid in case of an accident. Secondly, any types of devices in which the control of the supply of fuel (water, gas or oil products) is carried out automatically. The air supply system is also not complete without gas cut-off valves. In agriculture, they are actively used in the arrangement of irrigation systems.

If we talk only about the solenoid shut-off valve, it is the most commonly used in the power industry.

Design of the device

As for the design of the gas cut-off valve, it is an electromechanical device that is controlled through an electric current. Current flows through a special magnet, thereby creating an electromagnetic field. It is due to the impact of the field that the device opens or closes.

If you pay attention to the same valves for water, then there is one or more springs. And the main operating element is an electric or pneumatic actuator.

Varieties

The gas cut-off valve has several varieties that differ from each other in the principle of operation. There are two suchsuch as normally open (NO) and normally closed (NC). The principle of operation of NO is quite simple. If there is no voltage, the valve will remain open all the time. The difference between the NC valve is that the absence of voltage will, on the contrary, close the valve. After that, you will have to open it manually.

Both of these devices are direct acting solenoid valves. This means that closing will occur due to the action of the electromagnet, and cutting off the flow of the working medium will be noted on both sides of the pipeline.

However, such devices have a significant drawback, which lies in the fact that the operating range of pressures and diameters is quite small.

Electromagnetic device for gas

It is worth saying that the device can be single-seated or double-seated. In addition, gas shut-off valves with signaling devices can be of both the first and second types. The presence of an alarm in the case of gas is especially important, as it is necessary not only to shut off the system, but also to inform the operator that a leak has occurred.

As for the single-seated valve, it cuts off the flow of the working medium only from one side. Most often, the dimensions of such valves will not be more than 50 mm. A two-seat device allows the gas flow to flow in two directions at once, but it is less hermetic than a single-seat one.

It is also worth paying attention to the fact that it is very important to choose the right device. If an electromagnetic design is chosen, then it must clearly comply with theits characteristics in the field of application. Here it is important to pay attention to the coincidence not only in terms of the transported working medium, but also in terms of pressure in the pipeline, as well as in terms of medium temperature. In addition, since it is a safety part, its emergency response speed should be as fast as possible.

KEI valve

Impulse electromagnetic gas cut-off valves KEI-1-20 are designed to automatically cut off the gas supply. The process takes place in internal gas pipelines, as well as in gas equipment, and a signal for operation will be a message about excessive gas contamination. To do this, such devices can be directly connected to signaling devices, for example, to SGB-1, as well as to other units that, during operation, will generate an output pulsed electrical signal.