Solenoid valves for gas. Description and characteristics

LPG equipment is increasingly found on cars. In many ways, this trend comes from the fact that fuel in the form of gas is quite cheap and helps save a lot of money when operating a car. Gas equipment is rather complicated, so it is quite possible to understand it if you set yourself such a goal. Do you have it? Then be sure to read a number of articles about gas equipment for cars on our resource. In particular, today’s article will tell everyone about what a HBO valve is, how it works and how it works.

Valve design for gas equipment

An LPG valve or multivalve (often called an electromagnetic valve) is quite important element in design gas equipment. Importance of this node is associated with the list of functions it performs, which are represented by filtering the gas mixture and locking it at some points in the operation of the machine.

In the standard version solenoid valve HBO consists of:

• core equipped with a gasket;
• valve return springs;
• directly to the valve, which also has a gasket;
• copper coil;
• source magnetic field;
• gaskets and seals;
• filter element;
• housings.

The design of the gas valve is examined in more detail in the image below. Note that, depending on the manufacturer of the LPG unit, its structure and design may differ slightly from those discussed in today’s article, but not significantly. So, for example, some multivalves are additionally equipped with a high-speed valve, which is necessary to provide power to the motor in the event of a break in the main fuel network.

In a template version gas valve located in front of the spray reducer, often right in its body. In fact, such an LPG element is a prototype of gasoline valves used in carburetor and injection systems. Of course, gas equipment is a fundamentally different way of fueling the engine, but still some similarities with gasoline types of power can be found. For example, the valves of both support systems are switches for engine operating modes. That is, if by switching a special toggle switch the motorist turns on gas equipment as the main power supply to the engine, then the gasoline system is turned off special valve, and vice versa.

Functions of HBO valves

Electromagnetic valves installed on gas equipment are called “multi-valves” because they perform several functions at once. To be more precise, the functional set of most nodes of this type includes:

• Possibility of refilling through a special fitting. Thus, the filling function of the valve allows you to fill the cylinder with fuel through it, if other methods for achieving this goal are not applicable for some reason;
• On the contrary, the possibility of emptying the cylinder through a special fitting;
• Blocking of filling and supply channels by using a valve mechanism;
• Blocking overfilling of the cylinder through the use of a special cut-off with a float;
• Blocking the gas supply through the line to the engine when its operation is stopped, which organizes the “anti-pop” function of the valve. This was especially true for the equipment of the first generations, because the slightest problems with the gas supply to the internal combustion engine were accompanied by the sounds of pops and explosions. It was the multivalve – anti-clap – that was the first to solve this problem;
• Determination of the gas level in the tank, thanks to a unique magnetic system for indicating its quantity;
• Filtration of gas in its liquefied state, which occurs due to the presence of a filter element in the structure of the unit;
• Organization of additional fuel replenishment of the engine.

Today, multivalves in their standard form with the set of functions noted above are practically not used, because such an LPG system is not absolutely safe. Despite this, such a giant in the field of universal gas valves as Lovato still produces a little of them for sale.

Valve faults: diagnosis and repair

The appearance of some problems with the functioning of the gas equipment may indicate a failure of its valve. Often, unit failures are as follows:

• Accumulation of third-party factions in their body (dust, debris, etc.);
• Development of internal elements of the part;
• No power supply to the valve;
• “Clogged” filter;
• Manufacturing defect.

There are two ways to check the gas valve of any gas equipment:

1. Measuring current indicators at its outputs;
2. Analysis of his work. A working valve always clicks when you turn the key in the ignition or start the engine.

Repair of a faulty unit is carried out either through its complete replacement or individual elements of the unit. Fortunately, special repair kits are still sold for most multivalves. Disassembling and assembling the unit is very simple and intuitive. The main thing is to do everything carefully so as not to damage anything with your own hands.

As you can see, even the most small element HBO can play a vital role in the functioning of the entire system. We hope that the material presented above was useful to you and provided answers to your questions. Good luck on the roads!

If you have any questions, leave them in the comments below the article. We or our visitors will be happy to answer them

Multifunctional solenoid valves for gas belong to the category pipeline fittings. The devices are used to distribute, regulate, cut off the working environment in boilers, geysers, pipelines and other gas equipment. The magnetic valve of the valve is controlled remotely, in automatic mode, this is its advantageous feature. The relay turns on or cuts off the supply electric current on the coil, the plunger rises or falls, opening or closing the hole, thereby controlling the gas flow.

The price for a solenoid gas valve is higher than for similar mechanical devices. The costs of its acquisition are recouped due to the ability to carry out technological processes in an optimal mode with minimum consumption fuel. In addition, the devices are recommended for installation, since they greatly increase the safety of operation of boilers, water heaters, and furnaces. In the event of a fuel leak, the magnetic choke will immediately shut off the gas supply, thereby preventing dangers associated with concentration harmful substances in room.

Multi-purpose fittings are used to service domestic and industrial installations, and automotive systems.

Device, principle of operation

The main elements are the seat and the bolt. The seat can be in the form of a piston or a plate; the configuration of the shutter varies, depending on the modification. The shutter is mounted on a core connected to an electromagnet. Opening and cutting off the gas supply occurs due to the reciprocating movements of the shutter. The magnetic mechanism is mounted on the outside of the valve body.

When electric current is applied to the magnetic component, a magnetic field is generated, which shapes the direction of movement of the gate. When the valve is operating, the electromagnetic unit is affected by the resistance force of the return spring and a magnetic field, the strength of which depends on the strength of the operating current. When the device is disconnected from the power supply, it returns (remains) to the position determined by the type of its design.

Alloys are used to make the valve body and covers stainless steels, brass, cast iron, polymers (ecologist, nylon, polypropylene). The plungers and rods are made of magnetic compounds.

The valve is connected to the pipeline using a flange or threaded connection. To the electrical network - using a plug.

Varieties

Solenoid valves are characterized by a variety constructive solutions Therefore, they are classified according to many parameters.

The valves are classified according to the opening method:

• normally open (NO); they remain in the open position when the power supply is interrupted, thereby ensuring conditions for the passage of the maximum volume of flow;
• Normally closed (NC): in the absence of current solenoid gas shut-off valve The NC is closed, thereby completely blocking the flow;
• universal: such models can remain in the open or closed position when the power supply is cut off.

In modified modern models the possibility of reconfiguring the pilot position of the membrane is provided. Devices with a NO plunger position can be converted to NC type valves.

Depending on the type of design, the valves can have a conventional or explosion-proof design. The latter are recommended for installation on objects that require high requirements on explosion fire safety (chemical, petrochemical, gas and other industrial enterprises).

Solenoid valves for gas It is also customary to classify according to control features into devices of direct action and those driven by piston (diaphragm) force.

• Direct-acting valves have a simple design, are characterized by fast operation and high reliability. In such models there is no pilot channel. Opening occurs instantly when the membrane is lifted. In the absence of a magnetic field, the spring-loaded plunger lowers. Models of this type do not require a pressure differential to operate.
• Models with piston (diaphragm) force are equipped with two spools. The function of the main one is to close the main hole; the control spool is responsible for the operation of the relief hole, which serves to relieve pressure from the area above the membrane. Due to pressure compensation, the main spool rises and the main passage opens.

Based on the number of pipe connections, solenoid valves are classified into two-, three- and four-way valves. Two way valves are either NC or NC type and have one inlet and one outlet pipe connection. Three-way valves have three connections and two flow sections. They come in NO, NC type and universal, and are in demand for organizing work automatic drives, distribution valves, cylinders with one-way vacuum action, alternating pressure supply. Four-way ones are equipped with four or five pipe connections. One connection is for pressure, one or two for vacuum, two for the cylinder. Such models are necessary for the operation of automatic drives and double-acting cylinders.

15.4.2016, 10:00

Good day.

I have a question about installation household alarm gas pollution in ordinary apartment, which works in tandem with a shut-off valve.
Below is a photo of the intended installation location and an approximate photo of the valve itself.

The questions are:
1. What will need to be done to insert this valve? Remove the entire pipe from the meter to the boiler, or you can unscrew it in the place where it is marked dismountable connection and unscrew it at the meter? Or maybe you won’t have to shoot at all?
2. How much will it cost approximately?

I called Gazprom and explained the situation. At first they explained to me that they had never done this in apartments and there was no need to do this, then they said draw up a project, bring it and we will tell you the price.

Just Vanya

15.4.2016, 10:56

What project? what are they talking about? If I need to cut a regular one stopcock(I don’t see any differences between the faucet and this valve in the installation method) will they also require a project?

Any changes to the gas main must be made through the project. You still overweight the boiler by 5 cm)

15.4.2016, 12:18

Any changes to the gas main must be made through the project

this matter is installed before the counter

Yes, that's understandable. Just to install it up to the meter, you need to turn off the entire riser with all its consequences, and after installation, start the gas supply throughout the entire riser. The price tag is cosmic.

15.4.2016, 12:52

The price tag is cosmic.

Yes, HZ... About 10 years ago, I had a pipe from the riser to the column running through the entire wall...
They cut the pipe and re-hung the column somehow inexpensively... I called the gas workers... they came and did it... They might be stricter, but I think the gas workers themselves are still slacking...

15.4.2016, 13:40

Yes, that's understandable.

In this case, there are two options:
1. Officially, with a specialist visiting, project drawing up and installation.
2. Turn off the tap in front of the meter and install it yourself in the place indicated in the photo (i.e. not officially)

I have just one question (or maybe two). Do you need it? Those. For what reasons did you decide to install an alarm?

15.4.2016, 13:45

What kind of project? Where to contact? Can I compose it myself or should it be a technical document with all that it implies?

15.4.2016, 14:33

Absolutely right. And the consequences are very simple. Only a certified organization that is part of an SRO can develop a document (PKD).
This time. Secondly, the full name indicated in the document stamp of both the developer and the reviewer and approver must be at least certified according to industrial safety in the RTN of the Russian Federation and have the appropriate state-issued certificates.
And then this project is coordinated with the operating gas industry organization for subsequent execution. Please note that the organization that will carry out the insertion must also have the relevant documents for the work.
I don’t know whether permits for hazardous gas work need to be issued. Etc. and so on.

In short, forget it. This is an expensive matter. And amateurish behavior can result in liability and a serious fine.

This is the answer to the question why no one puts this in apartments. It’s problematic and very expensive.
Thank you very much for the answer.

Do you need it? Those. For what reasons did you decide to install an alarm?

Well, I didn’t imagine that any manipulations with my apartment gas line could entail so much red tape....
An alarm with a valve costs 3 thousand rubles. The installation is essentially elementary and, apart from problems with the project, it would not be expensive.
As a result, for little money you protect yourself from gas leaks, which, for example, you will not feel at night. Or when returning home, you smell a strong gas smell; few people begin to act adequately. The result is an explosion or suffocation...
In general, a gas leak in itself is an unpleasant thing, and why not protect yourself and your family from it? This is a rhetorical question. For the price tag of 10,000 +, why don’t you need any signaling device?

The list of pipeline fittings includes a mechanism such as a solenoid valve for gas. It is a device that works to distribute and regulate in gas pipelines, boilers, for geysers and other gas supply systems.

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

The created magnetic pulse provokes a displacement of the electromagnet, which in turn initiates the movement of the shutter.

Purpose and features

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

The Lovato BH Series Solenoid Valve on any gas line essentially works like a regular tap that can shut off the gas supply at the touch of a button. In addition, the magnetic assembly increases the safety of using gas equipment (boilers, dispensers, ovens).

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

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

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

Device

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

The shutter can open and shut off the gas supply by performing reciprocating movements. It is installed on a core, which is connected to an electromagnet.

A magnetic mechanism is installed on the outside of the mechanism (at the top of the case).

The operating principle of the Lovato BH series gas solenoid valve is that when electric current is applied to a magnetic element, a magnetic field is formed.

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;
• A magnetic field that depends on electric current.

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

When the mechanism is disconnected from power, it returns to the position determined by its design.

Types and differences

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

• Normally open (NO). When the voltage is turned off, devices in this group remain in the open position and ensure free flow of gas.
• Normally closed (NC). Solenoid valves without electrical current supply have closed position and block access to free gas flow in the gas system.
• Universal. This type of gas valve can be in either a closed or open state when the voltage is turned off.

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

• Direct action. This assumes that the shutter is only activated when the core moves.
• Indirect action. When the shutter moves not only under the influence of the core, but also under the influence of gas. Buy solenoid valve for gas of this type it is advantageous if a large flow is expected, because it saves system effort.

According to 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 you only need to supply or shut off gas to the system.
• 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 you buy a Lovato BH 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 the following conditions:

• Electrical maintenance. It is best to choose models with additional manual adjustment, or intrinsically safe ones with low power.
• Pipeline pressure. Do not select a valve with a pressure rating that exceeds the pipeline pressure. This may cause damage to the mechanism.
• Environment. You should check the valve specifications and make sure that the product can be operated under existing conditions. This is relevant when the room where the mechanism will be installed is expected to high humidity, vibration, high (or vice versa - low) temperature, direct sunlight or any other parameters different from the norm.
• Required voltage. It is worth checking the power source for stable voltage. Uses a 220V gas solenoid valve, and if the voltage is lower, it will cause the mechanism to not be able to open and close normally. And with increased voltage, the device will overheat. This is also relevant on gas equipment of cars - then they install a 12 volt gas solenoid valve.

The price of a gas solenoid valve will vary depending on the type, size and application.

An electromagnetic valve for a gas water heater depends on the model of the water heater) will cost from $4 to $10. A Lovato magnetic gas valve for a car costs from $10 to $15.

Devices that are not used for household purposes 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 gun will cost $43.

Product overview (video)

Installation nuances

The Lovato BH series solenoid valve is installed for rooms 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.

The connection is made using threads (when small-diameter models are used) or using flanges for pipes with a large cross-section.

A gas valve is a type of pipeline fitting that is responsible for controlling and regulating the working environment, as well as for distributing and shutting off the flow of a gas pipeline. Thus, the functioning of this device is based on very important functions. In the article we will look at what gas valves for boilers there are and note them distinctive features.

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

Gas valve Honeywell

Purpose and operating principle of a gas solenoid valve

An electromagnetic gas valve is a device that allows you to regulate 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 will independently shut off the pipeline 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 is retracted and begins to lift the plunger, thus allowing free access of gas to the working environment.

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 the flow of gas. The main purpose of such a device is to distribute and regulate the gas supply in pipelines, boilers, dispensers and other devices.

Varieties

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

1. Two-way. They are structures that have two openings - inlet and outlet. Their main use is to block the supply or open the flow of the working fluid of the pipeline.
2. Three-way. Such mechanisms have one inlet and two outlets. Such valves perform shut-off, regulating and redirecting functions.
3. Four-way. Such gas valves have four openings: three outlets, one inlet. In their operation, they are similar to three-way valves, only thanks to one more additional input, their scope of application is slightly expanded.

The following classification is the type of valve control:

1. Manually operated mechanisms. Represent simple designs, the shutter of which begins to operate at the moment when the control wheel or lever turns. The main distinguishing features of such valves are high reliability and low price.
2. 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 networks and production lines.

Gas shut-off solenoid valve with manual cocking 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:

1. Normally open. Such valves go into operation when the power is turned off. open position, thus ensuring free movement of the working medium in the pipeline.
2. Normally closed. When there is no power supply, the valve assumes a closed position and blocks the gas flow in the system.
3. Universal valves. Such mechanisms, when the power supply is turned off, remain in the same position in which they were before.

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

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 a 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.

The gas safety valve is responsible for the same processes as the non-return valve. He is protective device, which does not allow to arise emergency situations because of sharp changes pressure in the system.

These valves automatically shut off the gas supply in situations where the pressure of the working medium is outside the normal range or, conversely, does not reach it.

Many users often resort to setting it to safety stop valve thermostat, air pollution meter, working fluid pressure sensor.

Gas valve selection

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

1. Firstly, you need to decide on the place where it will be used and based on this you need to look at the properties that it should be characterized by.
2. Electrical maintenance. It is best to choose a valve with low power and intrinsic safety or with additional manual adjustment.
3. Pressure. When choosing a valve, be sure to check what pressure is in the pipeline. It must not exceed the rated pressure additional equipment, since too high pressure can damage the mechanism.
4. Network voltage. This indicator should be given special attention, since increased/decreased voltage can lead to a negative outcome - the valve may simply break.
5. Environment. It is also important to pay attention to the conditions under which the valve will operate. 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

Let's look at the most popular companies that produce gas valves.

Dungs

A German company that is one of the most popular in the production of gas control valves.

Dungs products began appearing on Russian market since 1999 and were able to firmly consolidate their position. Users constantly purchase products from this manufacturer because they are different high quality, reliability and long service life.

Double gas valve device DUNGS type DMV

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

The most technologically advanced development of the Dungs company in the mass segment is the Dungs DMV-D valve - this is a two-way device, which, in fact, is a connection of two independent valves in one compact body. Thanks to your technical specifications it can function in work environment With high pressure(up to 500 mbar). The cost of devices starts at approximately 12,000 rubles.

SIT GROUP

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

Gas valve SIT 845 SIGMA

The Sit 845 Sigma valve is the most popular device that can be bought in the budget price category. The 845 Sigma gas valve has a two-way design that can be mounted on gas-consuming appliances from most common manufacturers; it is also suitable for a gas boiler.
This valve is equipped with an electric drive, so its operation requires a constant voltage of 220 Volts, in the absence of which the valve locking mechanism takes the closed position. The main advantages of 845 Sigma are the minimum period of valve activation and compact dimensions.

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

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