Solenoid valve for gas boiler. Gas solenoid valve Normally open solenoid gas valve

Electromagnetic gas valve Is one of the devices pipeline fittings designed for the distribution and regulation of the working medium in gas supply systems, as well as on gas pipelines. The main distinguishing feature of the solenoid gas valve is remote control, which is carried out using the supply of electricity. An electrical impulse initiates the movement of the electromagnet in a given direction, which, in turn, sets the movement of the gate.

Electromagnetic gas valve device

The working element of the gas solenoid valve is a seat - an opening located inside the body for the passage of the working medium, as well as a shutter. Depending on the model and configuration of the device, the shutter can be made both in the form of a plate and in the form of a piston. By making reciprocating movements, the valve opens or shuts off the gas supply. It is installed on a magnetic rod (core), which is connected to an electromagnet. The very same solenoid coil is installed in the upper part of the body from the outside of the valve.

Gas solenoid valve: principle of operation

The principle of operation of an electromagnetic gas valve is that when electricity is applied to the coil, a magnetic field is created. Under the action of this field, the electromagnet is drawn into the coil, and thereby sets the direction of movement of the shutter.

During operation, the valve is exposed to two forces - on the one hand, it is the resistance force of the return spring, and on the other, the magnetic field force. The latter is regulated by force electric current- the stronger the electric current, the higher the force with which the effect of the spring is overcome. Thus, by adjusting the current supply, it is possible to regulate the degree of opening or closing of the electromagnetic gas valve, and, consequently, the supply of the working medium.

When the power supply is cut off, the valve returns to its original position, which is determined by its design.

Varieties of solenoid gas valves

All models of gas solenoid valves existing today can be conditionally divided into three large groups:

Normally open (NO). When there is a normal power outage, the open gas valves are in the open position, allowing free flow of the medium.

Normally closed (NC). Normally closed solenoid valves without supplying electricity come to a closed state, thereby shutting off the gas flow in a pipeline or any system.
Universal. The universal gas solenoid valve is designed in such a way that in the event of a power outage, it can remain in both closed and open position.

As for other differences, here we can highlight solenoid gas valves direct and indirect action. The former assumes that the valve plug is actuated only by the movement of the core; the latter use not only the core to move the shutter, but also the force of the working environment, which significantly saves efforts with large passages.

Electromagnetic gas valves also differ in the number of strokes. Currently there are:

Two-way valves with inlet and outlet only. Devices of this type are intended solely for supplying or shutting off the working medium into any system.

Three-way valves with one inlet and two outlets. Such a solenoid gas valve can not only pass, but also redirect the gas flow in the system.
Four-way valves are devices that have four ports - one inlet and three outlet. Like three-way valves, they can redistribute the flow of the working medium, but unlike them, they provide more options for connecting to various systems.

It should be noted that within each type of electromagnetic gas valves there are many models and modifications of these devices, differing in both size and functionality. For example, depending on the operating conditions, some valve models may have special coating resistant to aggressive media.

Where to buy a solenoid gas valve?

Solenoid gas valves are devices that operate on gas lines and failure can lead to severe unpleasant consequences... This is why valves must meet the most stringent requirements for safety and reliability. And this means that you need to purchase them only from a well-proven manufacturer.

Penza Valve Plant OJSC is an enterprise with more than half a century of history. During the operation of the plant, our devices have repeatedly proved their highest quality and unsurpassed reliability. Therefore, if you need to purchase pipeline fittings, we recommend that you pay attention to the products of PAZ OJSC, among which there are also different models electromagnetic gas valves.

The list of pipe fittings includes a mechanism such as a gas solenoid valve. It is a device that works for distribution and regulation in gas pipelines, boilers, for a gas water heater and other gas supply systems.

The solenoid valve for gas has one essential feature: the solenoid valve is controlled remotely by supplying an electric current.

The generated magnetic impulse triggers the displacement of the electromagnet, which in turn initiates the movement of the gate.

Purpose and features

The magnetic choke is widely used both in industry and in everyday life. The Lovato VH series magnetic gas valve is installed in everyday life, first of all, on pipelines supplying natural gas to premises (for example, columns).

The Lovato BH series solenoid valve on any gas pipeline essentially works like a conventional valve that can shut off the gas supply at the push of a button. In addition, the magnetic assembly enhances the safety of use. gas equipment(boilers, columns, stoves).

If a gas leak occurs, the magnetic choke can quickly block the gas supply to the room.

The Lovato VN series solenoid valve is used for gas stove or speakers, industry and automotive systems, various workshops.

In addition, the LPG solenoid valve performs additional function for cleaning fuel from the presence harmful impurities in him.

Device

The Lovato BH series magnetic gas valve consists of a seat and a shutter. There are two options for its device: in the form of a plate or a piston. The type of plug depends on the configuration and model of the valve.

The valve can open and close the gas supply by reciprocating. It is mounted on a core that is attached to an electromagnet.

On the outside of the mechanism, a magnetic mechanism is installed (at the top of the case).

The principle of operation of the Lovato VN series gas solenoid valve is that when an electric current is applied to a magnetic element, a magnetic field is generated.

The electromagnet, being under the influence of the field, begins to be drawn into the coil. This process creates the direction in which the shutter moves.

Two forces act on the electromagnetic unit during operation:

Return spring resistance;
Magnetic field that depends on the electric current.

If you submit high voltage, then the magnetic field increases and overcomes the resistance of the spring. By adjusting the current strength, you can adjust the opening of the solenoid valve, which leads to control over the gas supply to the boiler, column or furnace.

Disconnected from the power supply, the mechanism returns to the position determined by its design.

Types and differences

There is a main division of all models of solenoid valves into three groups:

Normally open (NO). Devices of this group, when the voltage is disconnected, remain in the open position and provide free flow of gas.
Normally closed (NC). Solenoid valves without the flow of electric current, they have a closed position and block the access to the free flow of gas on the gas system.
Universal. This type of gas valves can be either closed or open when the voltage is disconnected.

It is worth noting that electromagnetic gas valves can also be divided according to the principle of gate movement:

Direct action. This assumes that the gate only comes into action when the core moves.
Indirect action. When the shutter moves not only under the influence of the core, but also with the help of gas. Buy solenoid valve for gas of this type, it is beneficial if a large flow is expected, because it saves the efforts of the system.

By the number of moves there are:

Two-way solenoid valves. They have only two holes: inlet and outlet. This type of device is best used when only supplying or shutting off gas to the system is required.
Three-way valves. They have three holes: one inlet and two outlets. Its advantage is that it is possible to redirect the gas flow through the system.
Four-way solenoid valves. They have four holes: one inlet and three outlets. The advantage here is not only the ability to redistribute the gas flow, but also to connect to additional systems.

Before buying a Lovato VH series magnetic gas valve, it is worth discussing where this device will be used and what characteristics it should have.

You should pay attention to conditions such as:

Electrical service. It is best to choose models with additional manual adjustment, or intrinsically safe with low power.
Pipeline pressure. Do not select a valve with a pressure rating that exceeds the line pressure. This could damage the mechanism.
Environment. Check the rating of the valve and make sure that the product can be operated on existing conditions... This is relevant when it is assumed in the room where the mechanism will be installed high humidity, vibration, high (or vice versa - low) temperature, hit of direct sun rays or any other parameters other than the norm.
Required voltage. It is worth checking the power supply for a steady voltage. It uses a 220V gas solenoid valve, and if the voltage is lower, it will lead to the mechanism not being able to open and close normally. And with increased voltage, the device will overheat. On the gas equipment of cars, this is also relevant - then a 12 volt gas solenoid valve is installed.

The price of a gas solenoid valve will vary by type, size and application.

The solenoid valve for the gas column depends on the model of the column) will cost from $ 4 to $ 10. And the Lovato magnetic gas valve for a car is from $ 10 to $ 15.

Devices that are not used for the domestic sphere are significantly more expensive. Let's also give a couple of examples.

A gas solenoid valve of the KGEZ type, depending on the configuration, will cost about $ 20-25.

BH series solenoid valve for gas cannon will cost $ 43.

Product overview (video)

Installation nuances

The VN series Lovato solenoid valve is installed for premises after the gas valve. It is recommended to install a filter in front of the valve.

To correctly install the mechanism, it is necessary to place the arrow on the body in the direction of the gas flow.

The column assembly must be positioned either horizontally or vertically.

Connection is made by means of threads (when using small diameter models) or by means of flanges - for pipes with a large cross-section.

A gas valve is a type of pipeline fittings responsible for controlling and regulating the working environment, as well as for distributing and shutting off the flow of a gas pipeline. Thus, at the heart of the functioning this device very important functions lie. In the article we will consider what gas valves for the boiler are and mark them distinctive features.

Find out the price and buy heating equipment and related products you can contact us. Write, call and come to one of the shops in your city. Delivery throughout the territory of the Russian Federation and the CIS countries.

Gas valve Honeywell

Purpose and principle of operation of the gas solenoid valve

The solenoid gas valve is a device thanks to which it is possible to adjust the flow natural gas in automatic mode.

With such devices, the use of natural gas is safer.

If a leak occurs, the solenoid valve for gas boiler to the maximum short time it will shut off the pipeline on its own and will not allow toxins, which are very dangerous substances for humans, to enter the room.

After the valve relay begins to supply electricity to the coil, the armature retracts and begins to raise the plunger, thus opening up free access to the flow of gas into the working medium.

After the voltage is turned off, the plunger returns to its original position and closes the channel between the inlet and outlet fittings, thereby preventing gas from flowing. The main purpose of such a device is to distribute and regulate the gas supply in pipelines, boilers, columns and other devices.

Varieties

Boiler gas valves are classified according to a number of criteria. The first is the number of inputs. Based on this indicator, the following types of valves are distinguished:

Two-way. They are structures with two openings - inlet and outlet. Their main application is blocking the supply, or opening the flow of the pipeline working medium.
Three-way. These mechanisms have one inlet and two outlets. Such valves perform shut-off and control and redirection functions.
Four-way. These gas valves have four openings: three outlets and one inlet. In their work, they are similar to three-way valves, only thanks to one more additional entrance, the scope of their application is slightly expanded.

The following classification is the type of valve control:

Mechanisms with manual control... Represent simple constructions, the shutter of which begins to work at the moment when the control wheel or lever is turned. The main distinguishing features of such valves are high reliability and low price.
Solenoid valves. Due to the fact that their design includes electric drive, they can function automatically. Typically, such devices are used in industrial gas pipelines, heating systems and production lines.

Manual Cocking Gas Shut-off Solenoid Valve Seitron

In turn, solenoid gas valves are classified based on the position of the valve that it takes in the event of a power outage:

Normally open. In the event of a power outage, such valves move to the open position, thus providing free movement of the working medium in the pipeline.
Normally closed. When there is no power supply, the valve assumes a closed position and shuts off the gas flow in the system.
Universal valves. Such mechanisms, when the power supply is turned off, remain in the same position in which they were previously.

Also, based on the functional purpose, there are two types of valves.

So, for example, a gas check valve: such devices are designed to protect the pipeline from the circulation of the working medium in reverse side... Due to the design features of the mechanism where it is involved check valve, it is possible to pass current exclusively in a given direction. This is the principle of its functioning.

The main purpose of the check valve is to protect the pipeline. Typically, such devices are mounted near the gas equipment itself: storage tanks, transfer pumps, dispensers, gas boilers and reducers, because this is how the check valve prevents the flame from being directed towards the appliances.

Gas safety valve responsible for the same processes as the check valve. It is a safety device that prevents emergencies due to sudden pressure drops in the system.

These valves automatically shut off the gas supply in situations when the pressure of the working medium is out of range or, on the contrary, does not reach it.

Many users often resort to setting to safety stop valve thermostat, air gas content meter, working medium pressure sensor.

Gas valve selection

In order to choose an electromagnetic gas valve, you should pay attention to a number of nuances:

First, you need to decide on the place where it will be used and based on this, you already need to look at the properties that it should be characterized by.
Electrical service. It is best to give preference to a valve with low power and intrinsic safety or with additional manual adjustment.
Pressure. When choosing a valve, be sure to specify the pressure on the pipeline. It must not exceed the nominal pressure additional equipment too high pressure can damage the mechanism.
Mains voltage. This indicator should be given special attention, since over / under voltage can lead to a negative outcome - the valve can simply break.
Environment. It is also important to pay attention to the conditions in which the valve will work. It is important that the technical characteristics of the valve are similar to the characteristics of the working environment: humidity, vibrations, temperature changes, etc.

Manufacturers

Consider the most popular companies that manufacture gas valves.

Dungs

The German company, which is one of the most popular in the production of gas control valves.

Dungs products began to appear on Russian market since 1999 and were able to firmly consolidate their positions. Users are constantly purchasing products from this manufacturer, because they differ high quality, reliability and long service life.

DUNGS double gas valve device type DMV

The only drawback that can be noted is the high price.

Dungs' most advanced mass-market development is the Dungs DMV-D, a two-way device that essentially combines two independent valves in one compact body. Thanks to its technical specifications it can function in a production environment with high pressure(up to 500 mbar). The cost of the devices starts at about 12,000 rubles.

SIT GROUP

The Italian manufacturer SIT GROUP started its activity in 1953. The company has existed for over 60 years and during this time has managed to establish itself extremely positively. The company's products are widely used due to the optimal price / quality ratio.

Gas valve SIT 845 SIGMA

The Sit 845 Sigma valve is the most popular device you can buy in the budget price range. The 845 Sigma gas valve has a two-way design, which can be mounted on gas-consuming appliances of most common manufacturers, and it is also suitable for a gas boiler.
This valve is equipped with an electric drive, therefore, for its operation, a constant voltage of 220 Volts is required, in the absence of which the valve locking mechanism assumes a closed position. The main advantages of the 845 Sigma are the minimum start-up period and compact dimensions.

The model allows you to adjust the boundary level of gas pressure at the outlet. Installation of the device on the pipeline is carried out by means of flange connection... A valve for a gas boiler Sit 845 Sigma can be bought for about 6,000 rubles.

Thus, the gas valve is responsible for the automatic gas supply.

One of the key elements affecting the operation of the system gas equipment, is an electromagnetic gas valve (EGK). Different experts call this unit of the system differently, for example, simply a gas valve or an LPG solenoid valve. It is about this unit of gas cylinder equipment that will be discussed in our today's article.

First of all, it should be noted that inexperienced users often confuse the LPG solenoid gas valve and - remember, these are different components of the system that perform completely different functions and have a completely different structure!

The LPG solenoid valve performs a shut-off function in the system, i.e. it opens and shuts off the gas supply to when the car is parked, or when the engine is running on gasoline. It should be noted that without power supply (+ 12v to the coil), the LPG valve is in a closed state and prevents the flow of gas from the line into the reducer.

HBO valve device

Depending on the models and the manufacturer's company, the LPG valve device may vary, but often consists of the following elements:

Core;
Valve with return spring;
Electrocoil with winding;
Gaskets and seals;
Filter rough cleaning... Quite often, the LPG valve is equipped with a coarse fuel filter, but this equipment is not required.

Installation and working principle

Installation

It should be noted that different LPG system installers install different numbers of solenoid gas valves on a vehicle.

The cheapest and most common scheme is the installation of one EGC directly on the reducer-evaporator.
More expensive circuit implies the presence of already two parallel LPG valves: one is installed on the reducer, the second on the flow line of the multivalve or after the multivalve and shuts off the gas supply to the line.
The last, most reliable and expensive option has three, paralleled with each other, devices: the first is still on the reducer, the second (backup or safety) is installed in front of the reducer, and the third - on / after the multivalve, near the cylinder.

Principle of operation

The principle of operation of the LPG valve is as follows:

Initially, the LPG valve is closed.
After the car is ready to switch to gas, the ECU (or the driver pressing the gas-petrol button) sends a signal (+12 v) to the EGK coil, the magnetic coil is triggered, raising the shut-off valve (a characteristic click is heard).
After opening the LPG solenoid valve, the gas enters the coarse filter, and then into the reducer-evaporator.

Possible malfunctions and breakdowns

Like any element of the system, the LPG gas valve is susceptible to breakdowns, and since, as we found out above, this element of the system performs a shut-off function, without its proper operation, the car will most likely not switch to gas. And although the cost of this unit of the system is not high, it is not always possible to purchase a new LPG valve, therefore, in order to repair a broken one, you need to have an idea of the most common failures of this element.

Mechanism contamination

The LPG solenoid valve works in the engine compartment, which means it is exposed to dust, dirt, rust, scale and other debris that can get into the inside of the device, thereby preventing the valve from opening. In this case, disassembly and simple cleaning of the device from foreign objects will help.

Clogged filter

Most of the valves that are installed in front of the gearbox have a coarse filter, which, although not directly related to valve failure, can provoke unstable operation of the entire LPG system or even prevent switching to gas at all. In this case, the filter must be replaced. It is recommended to do this at least 2 times a year or every 10,000 km of run (whichever comes first).