Traction sensors, overheating, temperature, flame, water flow and ionization in gas columns

Replacement of the solenoid valve of the gas column Neva 4510, Neva 4511, Neva 4513

Defective solenoid valve is one of the reasons when, when opening the tap, electric ignition is triggered, but gas does not flow... The solenoid valve is responsible for the automatic admission of gas to the burner after the diaphragm is triggered.

1. The solenoid valve (shown here by the example of Neva 4510, Neva 4511, Neva 4513) is located on the water-gas unit, more precisely on its “gas half”.

2. The solenoid valve is fixed with the usual four screws, and with a screwdriver, it is very easy to detach from the unit body.

3. It is worth paying attention to the rubber seal ring, the task of which is to prevent gas leakage from the unit into the room. The fourth photo clearly shows the hole through which the gas enters the column when it is started. The solenoid valve is "normally closed", i.e. with a spring, when the column is off, the valve stem is pressed tightly against the hole, and the gas is thus shut off. When the membrane is triggered and the entire circuit is started, the electronic control unit opens the valve, i.e. the valve stem is "pulled in" by the electromagnetic field, and gas flows to the column burner.

4. In the last three photos, we have shown the operation of the solenoid valve in the off and on positions. Those. the work of the solenoid valve consists in the movements of this rod. In fact, if you carefully remove the valve, leaving it connected to the control unit, and sliding the stem that moves the diaphragm, you can see if the valve works or not, and either buy a new one or look for the malfunction further.

5. The solenoid valve is quickly replaced. Installing a new one. We open the tap. We wash!

Source: www.tskl.ru

Column device

How to understand the location of the water heater components? Don't worry, the diagram will help you. It is created on the basis of columns.

External device:

1. Metal casing.
2. Control window.
3. Gas flow regulator.
4. Water regulator.
5. Digital indication of temperature.
6. Cold water connection (thread G 1/2).
7. Hot water outlet.
8. A branch pipe for connecting to a gas line (cylinder).
9. A branch pipe for the removal of combustion products is connected to the chimney.
10. The foundation. Back wall.
11. Installation holes.

Internal equipment:

• 6, 7, 8 - continued, nozzles, as indicated above.
• 12 - water node.
• 13 - water regulation rod.
• 14 - drain plug.
• 15 - microswitch.
• 16 - control unit.
• 17 - gas unit.
• 18 - fuel adjusting rod.
• 19 - solenoid valve.
• 20 - collector.
• 21 - collector fixing screws.
• 22 - burner nozzles.
• 23 - spark plug.
• 24 - ionization sensor.
• 25 - copper heat exchanger.
• 26 - output to the water unit.
• 27 - outlet to the gas unit.
• 28 - mounting bolts.
• 29 - thermal relay.
• 30 - thermometer.
• 31 - gas outlet device.
• 32 - thrust sensor.
• 33 - mounting brackets.
• 34 - battery compartment.

Having understood the design, you can start troubleshooting.

Features of a normally open valve

The principle of operation of the most common statically closed design was described above. In the case of a normally open valve, the regulation is different. In the normal position, the shut-off elements provide a free passage for gas mixtures, and the supply of voltage, accordingly, leads to a closure. Moreover, maintaining a long closed state for security purposes is possible only with long-term and stable support of a given voltage. An even more functional solenoid valve for a gas boiler does not act directly, but with a technological pause. In a short period of time, the system evaluates whether other safety conditions are being met in the mixture supply circuit. The voltage in the coil does not, as such, initiate the closing of the valve.But if the indirect conditions are met, then it fires automatically. The decisive factor, in particular, can be a certain voltage value, the same stability or a given amplitude of the pressure drops.

Speaker malfunctions

The indicated malfunctions and options for their elimination are suitable for all models produced by "Neva", including: 4510, 5514, 4511, 4513, 4510M, 4513M, 4610, 5611. We will separately consider error codes and breakdowns on the example of some models.

You will need to remove the cover to access the inside of the instrument. How to do it yourself:

• Be sure to shut off the water and gas supply.
• Pull the adjusters towards you and remove.
• Some models have a screw behind the adjuster. Unscrew it.
• Disconnect the temperature indicator wiring.
• Remove the casing mounting bolts.
• Pull the trim towards you a little, then up.

You can start repair work.

Breakdowns "Neva Lux" 6011 and 6014

Reasons for the appearance and ways of troubleshooting.

The burner does not ignite. No spark... In this case, the temperature indication does not work when the mixer is opened.

• Weak water pressure. If the pressure in the tap is small, you need to wait until the flow is restored. The installed model may be too powerful for your plumbing. Also check the adjustment toggle switch, set to maximum value. For frequent pressure problems, it is recommended to install a circulation pump.
• The batteries are dead. Some users are confused by the scoreboard. If the display is lit, the user thinks the batteries are ok. But lighting a candle requires more current. It is important to choose high quality batteries.

The manufacturer recommends installing LR20 (alkaline) batteries. Therefore, salt cells such as R20, which are sometimes used, will not give stable performance. An alternative to the LR20 is the CR20, but the cost is much higher. To replace, turn the knob in the battery compartment.

Expert advice: Check food contacts more often. The technique works with water, so the contacts are susceptible to corrosion and chemical deposits.

• Defective flow sensor. Inspection and replacement required.
• Wear of the rubber membrane. This can be understood by visual inspection. Open the mixer and see how the pusher works. If it does not move, then the membrane is damaged or stretched (marked with a blue arrow in the photo). Red arrows mark places that are susceptible to leaks.

You can remove the water part together with the gas part. The dismantling procedure is marked with letters:

• a - after turning off the fuel supply, the supply hose is unscrewed.
• b - the cold water nut is loosened.
• c - the nut of the water block and the radiator pipe is unscrewed.
• d - the wiring of the solenoid valve is disconnected.
• d - the microswitch loop is disconnected.
• e - the bolts of the flange connection are unscrewed.

Broken electronic board requires a call from a specialist.

Breakdown on the device case. A clicking sound is heard, as if a spark was forming, but no ignition occurs. Hence, the insulation of the candle is broken. If defects are found during inspection, a serviceable part must be supplied. Also, the cause of the breakdown is a violation of the tight connections of the cable with the control unit. Return the cable to the socket.

Neva Lux error codes

The display allows the user to see the fault code. Self-diagnosis of the column gives a digital value in case of a malfunction.

E0 - the boiler shuts down. Fuel does not flow into the system. Check the gas valve, the supply may have been shut off for a short time.

Error E1 - the control board does not receive a signal from the flame sensor. More than a minute passed.

What could have happened:

• Air in the gas pipeline. This happens when the device is turned on for the first time or when the device is turned off for a long time.Open and close hot water several times until the burner ignites.
• The fuel supply valve is not fully open. Unscrew the tap.
• Insufficient pressure in the gas line.
• The tank has run out of fuel. The cylinder needs to be replaced.
• Violation of the wiring between the water unit and the flame sensor, solenoid valve. Inspect the loop for damage to the insulation.
• The electrode has moved out of place, does not reach the burner. Return the part to its original location.
• Soot is present on the electrode and flame sensor. You can clean the parts with a brush.
• The contacts between the spark plug and the high-voltage wire are removed.
• The nozzles are clogged with soot.

The burner must be removed for cleaning. Disconnect the wiring and unscrew the nipple nut. Unscrew the two manifold bolts, then do the same with the burner mounts. After dismantling, the holes are washed with a brush and soapy water. Reassemble after rinsing and drying.

E3 code - the solenoid valve worked before the signal from the flow sensor was received.

• The valve is defective. A new element is being installed.
• The electronic unit has broken. Diagnosis is carried out by a specialist.

Error E7 - after 7 attempts to ignite, the equipment still does not light up or goes out.

• Open the fuel valve as far as it will go.
• The ionization sensor has moved or soot has accumulated on its electrode. It should be in the flame zone, near the burner. Cleaning is done with a brush.
• The electrical valves are out of order.
• The water or gas block has boiled. Replacement of elements.

Error E8 - the thrust sensor has been triggered. The reasons:

• The sensor is broken. See if the contacts are tight, change the part.
• The chimney is clogged with debris or soot. If you cannot clean the passage with your own hands, contact your utilities.

L0 - not enough fuel is supplied for normal operation. What happened:

• Weak water pressure. The line pressure acts on the diaphragm, which opens the valve. Wait for the flow to recover, adjust the toggle switch or descale the radiator. How to do this is described in the article on cleaning and repairing a gas column heat exchanger.

• The temperature at the regulator is too low. Increase your metrics.
• The pressure in the gas line exceeds the permissible limits. Install the reduction gear.

Such malfunctions are typical for the Neva 3208 and Neva Transit models.

Other problems faced by users

The device works for a while, then turns off... Draft problems that can arise from blockages or improper installation of the hood.

Typical user mistakes:

• The ventilation pipe is installed too close to the flue wall, normal draft is not generated.
• Another device or hood is connected to one pipe.
• There is another window on the level with the ventilation of the column.

The column does not light up or immediately goes out... The temperature sensor is triggered.

• Overheating has occurred.
• The part is out of order.
• The membrane is stretched.
• Flame sensor does not work.

Display does not work:

• The thermal sensor is out of order. Need a replacement.

• Contacts broken.
• Display defective.

The equipment is very noisy:

• Twist the water regulator. Reduce the head.

• The gaskets in the pipe joints protrude out of place. Replace the gasket.

You have learned the structure of the Neva water heater, its typical malfunctions. You can start fixing the problem. We hope our article helped you get the technique back on track.

Source: cosmo-frost.ru

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 an electric current are closed and shut off 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 shutter is only activated when the core moves.
• Indirect action. When the shutter is set in motion not only by the action of the core, but also by the action of the gas. It is profitable to buy an electromagnetic valve for gas of this type 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 on 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 ensure that the product can be operated under existing conditions. This is relevant when the room where the mechanism will be installed is expected to have high humidity, vibration, high (or vice versa - low) temperature, direct sunlight or any other parameters that are different from 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.

The BH series solenoid valve for a gas gun 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 placed 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.

15.4.2016, 10:00

Good day.

Interested in the question of installing a household gas alarm in an ordinary apartment, which works in tandem with a shut-off valve. Below is a photo of the proposed installation site and an approximate photo of the valve itself.

The questions are as follows: 1. What will need to be done to tap this valve? Is it possible to completely remove the pipe from the meter to the boiler, or can it be unscrewed in the place where the collapsible connection is indicated and unscrewed from the meter? Or maybe you won't have to shoot at all? 2. How much will it cost?

I called Gazprom and explained the situation. At first they explained to me that they had never done this in apartments and that it was not necessary to do this, then they told me to 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 about? If I need to cut in an ordinary shut-off valve (according to the installation method, I do not see any differences between the valve and this valve) will they also require a project?

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

15.4.2016, 12:18

Any changes to the gas line must be through the project

this case is installed before the counter

Yes, that's understandable. Just to install before the meter, you need to turn off the entire riser with all the consequences, and after installation, you still need to start up the gas throughout the riser. The space price tag comes out.

15.4.2016, 12:52

The space price tag comes out.

Yes HZ ... About 10 years ago, my pipe from the riser to the column went through the entire wall ... They cut the pipe and outweighed the column somehow inexpensively ... hack ...

15.4.2016, 13:40

Yes, that's understandable.

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

I just have one question (or maybe two). Do you need it? Those. Why did you decide to install the signaling device?

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

Quite right. And the resulting ones are very simple. Only a certified organization that is part of an SRO can develop a document (PCD). This time. Secondly, the full name indicated in the stamp of the document of both the developer and the inspector and approver must at least be certified for industrial safety in the RTN RF and have the corresponding state sample certificates. And then this project is coordinated with the organization operating the gas facilities for subsequent execution. Note that the organization that will make the insert must also have the appropriate documents for the work. I don’t know if it is necessary to issue permits for gas hazardous work. Etc. etc.

In short, forget it. This is an expensive business. And amateur performance can turn into responsibility and a serious fine.

Here is the answer to the question why no one puts such things in apartments. It is problematic and very expensive. Thank you very much for your reply.

Do you need it? Those. Why did you decide to install the signaling device?

Well, I didn’t imagine that any manipulations with my apartment gas branch could pull so much red tape .... A signaling device with a valve costs 3 tr. Installation is essentially elementary and if you don't take into account the troubles with the project, then it would not be expensive. As a result, for little money, you protect yourself from a gas leak, which, for example, you will not feel at night. Or, returning home, I felt a sharp smell of gas, few people begin to act adequately. As a result, an explosion or asphyxiation ... In general, a gas leak is an unpleasant thing in itself, and why not protect yourself and your family from this? This is a rhetorical question. For a price tag of 10,000 + nafig, no signaling device is needed

Gas equipment protection systems shut off the flow of energy in case of emergency. Without them, the operation of gas installations is prohibited. Protective elements include solenoid-type gas valves.

Unit device

Regardless of the firms that produce these units, the features of the device are almost the same for everyone. Currently, there are two types of geyser designs. They are:

• with an open combustion chamber;
• turbocharged.

The second type is characterized by a closed combustion chamber, and air is forced through a fan. The general device of the unit can be considered on the example of the Lvov water-heating column VPG-23.

From this video we learn the principle of operation of the gas water heater:

This is a fairly simple and unpretentious heater model. The device is quite old and has long been successfully used in many houses and apartments. The column consists of the following elements:

• gas outlet;
• heat exchanger;
• gas burner;
• crane;
• solenoid valve.

In turn, the heat exchanger consists of an air heater and a combustion chamber, through which a cold water pipe, made in the form of a coil, runs. The gas burner consists of 13 sections and a collector connected to each other. With the help of a gas outlet, combustion products are removed directly into the chimney.

With the help of the valve, gas is supplied to the igniter or the gas pipe is shut off for a long time. Water is supplied to the left of the lower part of the column water system, which consists of a nozzle, a membrane, a stem with a plate, an ignition retarder, an oil seal and a stem spring.

Gas valve device

An HBO valve or multivalve (often called electromagnetic) is a rather important element in the design of gas equipment. The importance of this unit is associated with the list of functions it performs, which are represented by both the filtration of the gas mixture and its locking at some points in the operation of the machine.

Typically, the LPG solenoid valve consists of:

• a core equipped with a gasket;
• valve return springs to reverse position;
• directly the valve, also having a gasket;
• copper coil;
• a magnetic field source;
• gaskets and seals;
• filter element;
• housing.

For more details on the design of the gas valve, see the image below. Note that, depending on the manufacturer of the LPG assembly, its device 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 organize the power supply to the motor in case of a break in the main fuel network.

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

Principle of operation

The geyser is designed in such a way that its work on water supply is automatic. When water enters the nozzle, its speed of movement increases significantly. The liquid flows through the holes into the upper cavity above the membrane. Due to the spring, the membrane rises, at the same time pushing the rod of the water part, which, resting on the gas drive, opens the valve, and the gas begins to flow to the burner.If the water supply is shut off, then the action of the rods occurs in the reverse order and the fuel ceases to flow into the combustion chamber. A safety valve is built into the gas system.

Its principle of operation in a gas column device boils down to the fact that when the combustion stops, the gas supply is automatically turned off. This action is carried out thanks to a thermocouple installed in the valve, which is heated directly by an open flame.

The thermocouple in the electrical circuit of the gas column is connected to the valve, and when heated, it generates a short-term voltage that acts on the solenoid of the shut-off device. When the combustion stops, the thermocouple cools down and stops generating current, and the valve, due to the spring, shuts off the gas supply.

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 increases the safety of using gas equipment (boilers, water heaters, stoves).

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 a gas stove or water heater, industry and automotive systems, various workshops.

In addition, the LPG gas solenoid valve performs an additional function of 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 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 a high voltage is applied, 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 that is determined by its design.

Popular speaker models

Currently, the choice of gas heaters, both domestic and foreign, is quite large. In the absence of centralized hot water supply, they are becoming more and more popular. Among them, the following models are worth noting:

1. Bosch WR 10-2P - this brand is an example of the latest developments in the production of speakers. Although it has large dimensions, it is possible to connect it to two water intake points at the same time. Thanks to the built-in piezoelectric element, starting up the equipment is quick and easy. The heater is equipped with a gas contamination sensor, which immediately shuts off the fuel supply if the equipment starts to work with a large release of harmful impurities. The service life of this unit is 15 years.
2. Ariston Fast Evo 11B - the operation of this device is fully automated, that is, it turns on and stops heating on its own. In a minute, this gas water heater is capable of heating up to 14 liters of cold water, while the temperature is adjusted only once, and then everything happens in automatic mode.
3. Neva 4510-M is a heater with a compact design and small dimensions. The gas burner ignites automatically, which makes it easier to start. The unit has a built-in flame modulation depending on the amount of water supplied. All control is carried out by two knobs, which are responsible for the amount of water and its temperature.

It is also worth noting the following brands of gas water heaters: Mora Vega 10, Ariston Gi7S 11L FFI, Gorenie GWH 10 NNBW, etc.

Types and differences

The main classification, according to which the division of devices on the market of control valves, including for a gas boiler, takes place, is the number of inputs. The following groups are distinguished:

• Two-way valves: these are designs with two openings - inlet and outlet. Such devices are used exclusively to block the supply, or to open the flow of the working medium of the pipeline.
• Three-way mechanisms are equipped with one inlet and two outlet ports. This design allows the device to perform not only a shut-off-regulating, but also a redirecting function.
• Four-way gas valve - has 4 openings, of which 3 are outlet and one inlet. They are, in fact, identical in functionality to three-way valves, however, the presence of an additional outlet somewhat expands their operating potential and the scope where a four-way valve can be used.

A division is also made according to the type of valve control, depending on this, two categories are distinguished:

• Valves with manual control of the closing element. These are simple mechanisms, the shutter of which is set in motion by turning the control wheel or lever. The main distinguishing quality of devices of this type is a fairly high reliability and a low price at which they can be bought.
• Solenoid valves. The presence of an electric drive makes it possible to control the shutter in automatic mode. Basically, such devices are used in industrial gas pipelines, heating systems, and production lines - that is, in places where it is necessary to simultaneously control a large number of control devices.

In addition, electromagnetic gas valves, depending on the position of the gate, which it takes in the event of a power outage, can be divided into three main groups:

1. Normally open constructions. In the event of a power outage, such devices move to the open position, thereby guaranteeing the working environment free circulation in the pipeline.
2. Normally closed. Without power supply, the valve assumes a closed position and shuts off the gas flow in the system.
3. Universal valves. Such valves, in a situation where the power supply is interrupted, remain in the position in which they were previously.

Also, depending on the functional purpose, there are two more types of gas valves.

For example, a gas check valve: devices of this type perform the function of protecting the pipeline from the movement of the working medium in the opposite direction. The design features of the mechanism, where a check valve is involved, allow the flow to pass only in a strictly specified direction. This is how it works.

Pipeline protection will be the main purpose of a mechanism such as a check valve. These valves are usually installed directly near gas equipment: storage tanks, transfer pumps, dispensers, gas boiler and reducers, since the check valve thus prevents the movement of flames in their direction.

The gas safety valve performs functions similar to those assigned to the check valve. These are special protective devices that prevent an emergency situation due to sudden pressure drops in the gas transmission system, including with the presence of a gas boiler.

These valves perform automatic shut-off of the gas supply in the event that the pressure of the working medium has exceeded or dropped below a predetermined limit.

The design provides for the release of a volume of gas that creates excess pressure into the atmosphere, after which the valve closes and the pipeline continues to work in normal operation.

It is worth mentioning that this type of pipeline fittings can be significantly modified.

So, a thermostat, an air gas content meter, a working medium pressure sensor, a mechanism for adjusting the gas flow rate are usually installed on a safety shut-off valve of a high price category. The design features of the mechanism, whether it is a conventional or a non-return valve, depend on its direct purpose.

Overview of products from popular manufacturers and models

Now let's look at the products of the most popular companies that manufacture such products.

Dungs

Dungs is a German company that is one of the most demanded manufacturers of gas control valves.

Dungs products have been present on the Russian market since 1999 and for more than 15 years they have won the fame of high-quality and reliable devices with a long service life and excellent technical characteristics.

The only drawback that can be noted in today's reality, as a result of comparing Dungs valves and products from Chinese manufacturers that flooded the market, is the price. Equipment manufactured by Dungs is much more expensive, however, its quality is incomparably higher.

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.

The technical characteristics of the valve allow it to operate with very high pressure of the working medium, up to 500 mbar, while the energy efficiency of this design from Dungs is beyond praise.

The price at which you can buy equipment from the DMV-D line starts at $ 250 and ends at around five thousand, depending on the size and design features of the product.

Valve adjustment (video)

Sit Group

SIT is an Italian manufacturer that began its work in 1953 and since then has firmly held a leading position in the gas equipment market to this day.

Today the Sit valve is the most demanded control valve in the middle price segment. The company's products have received universal recognition due to the optimal price-quality ratio, which was achieved by the company's engineers.

Now let's take a look at the most popular devices under the Sit brand.

The Sit 845 Sigma valve is by right the most popular and demanded device from those that can be bought in the budget price range.

The 845 Sigma gas valve has a two-way design, which can be installed on gas-consuming appliances of most common manufacturers, and it is also suitable for a gas boiler.

This 845th valve is equipped with an electric actuator, 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 the compact design.

This model allows you to adjust the boundary level of the gas outlet pressure. The device is mounted on the pipeline by means of a flange connection. The 34 ”Sit 845 Sigma gas boiler valve can be purchased for $ 60.

The Sit 820 Nova valve is the best option for gas-consuming devices, the power of which does not exceed 60 kW.

It is produced in an electrically driven version without a power modulator, while there is the possibility of automatic adjustment, for the implementation of which a constant energy source is required.

The limiting level of the maximum pressure at the inlet to the valve should not exceed 60 mbar.

The optimum ambient temperature for normal operation is from 0 to +70 degrees (intended for installation inside heated rooms). The Sit 820 Nova valve can be purchased for between $ 55 and $ 130, depending on size.

Such a valve is a technically advanced device, equipped, in addition to an electric actuator, with a thermostat, as, for example, in the 630 Eurosit gas valve. This mechanism is intended for domestic use, it can be installed on gas water heaters, convectors, water heaters to be included in the set of equipment for a gas boiler, etc.

Take the 630 Eurosit valve as an example. The 630 Eurosit gas valve is adjusted by means of a special wheel, which has three operating modes: "MS" (temperature selection), "ignition", and "off". Also, the 630 Eurosit valve provides a setting for the maximum gas flow rate, which is a feature of the 630 Eurosit valve.

The thermostat, equipped with a special modulation system, prevents any malfunction of the 630 Eurosit valve, and if the permissible operating temperature is exceeded, it completely shuts off the gas flow to the main burner.

The 630 Eurosit valve is mounted using threaded connections. The design features of the valve allow it to operate with an inlet gas pressure of 50 mbar.

In this case, the permissible operating temperature of the external environment is from 0 to 80 degrees. The 630 Eurosit valve can be purchased for $ 50, assuming a 34 '' part.

Gas equipment is increasingly found on cars. Much of this trend comes from the fact that fuel in the form of gas is quite cheap and helps to save a lot of money when operating the car. Gas equipment is arranged moderately complex, so it is quite possible to deal with it if you set 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 an LPG valve is, how it works and how it works.

Malfunctions and their elimination

Very often there is a situation when the column does not light up. This usually happens when there is no draft in the ventilation. This may be due to the formation of a large amount of soot or the ingress of a foreign object into the duct.

Most models are equipped with a special protective device, which blocks the flow of gas. Therefore, immediately before starting, it is necessary to check the traction with a lighted match or a piece of paper. In devices with automatic ignition, the batteries may fail and must be replaced. Also, the heater may not start if the pressure in the water supply system is weak. This is often due to clogged water filters.

There are cases when the gas is ignited and immediately extinguished. Here you need to adjust the supply of cold and hot water. Due to the formation of scale in the heat exchanger, the pressure of hot water from the column decreases.

In this case, the heat exchanger is removed and cleaned using chemicals. With proper operation and maintenance, the heater can last a very long time, even beyond the specified service life.

Source: kaminguru.com

Gas valve types

Solenoid gas valves come in various configurations and internals, but they are all divided into:

• Closed in normal state (NC). That is, in the absence of voltage, the gas is shut off.These are mainly emergency valves.
• Normal open (NO). The gas flows freely if there is no voltage on the coil, and is closed when the control signal is applied.
• Universal type. In such devices, you can switch the position of the shutter, which can be either open or closed, in the absence of power to the solenoid coil.

According to the principle of actuation of the shutter, the solenoid gas shut-off valve can be of an indirect and direct locking method. In the first case, the core of the electromagnet is assisted by the pressure of the working medium in the event of a shutter actuation. In the second, the shutter is moved only by an electromagnetic force acting on the rod.

Gas valves can perform not only a protective function, but also a distribution one. In this sense, there are devices for a different number of moves:

• Valves are two-way type. These are the most common safety valve models with one inlet and one outlet. Their main function is to block the channel in any possible emergency situations.
• Valves are three-way type. Distribution valves providing the ability to direct the gas flow from an inlet between two outlets.
• Four-way valves can be built into various complex systems where there is a need to control the flow of energy through three different channels.

In addition to the above features of modifications of gas valves, each specific device may have an original design that differs from the standard. For example, some valves have internals specially made to work in aggressive conditions.

Speaker malfunctions

Let's make a reservation right away that we will consider the problems of flow heaters with an open combustion chamber, of which a great many are installed in apartments and houses. We will bypass the repair of fully automated turbocharged dispensers with power supply from the network and ignition from a hydrogenerator. These devices are quite complex and interference in their design is contraindicated for an ignorant person. Service or gas services should deal with the troubleshooting of the supercharged units.

The list of malfunctions inherent in gas water heaters after several years of operation is as follows:

• smell of gas;
• problems with ignition and starting of the main burner;
• turning off the heater during operation;
• various leaks.

If there is a smell of gas, it does not matter whether constantly or periodically, you must immediately turn off the corresponding tap, open the windows and call the emergency service. Explain the nature of the problem to the dispatcher, and he will make a decision - to urgently send a team to your home or simply send the foreman in turn. There are no other options, it is strictly prohibited to eliminate methane leaks on your own.

Ignition problems

There are two types of ignition systems for atmospheric heaters, we will analyze them separately:

• manual, with a spark from the piezoelectric element;
• automatic battery powered.

For reference. The most modern models of dispensers are fired up automatically from the energy generated by the hydrogenerator. Everything is relatively simple here: if the ignition does not work, then the reason is the weak pressure in the water supply, or the generator itself has failed.

With the manual method of ignition, sometimes there is such a malfunction of the gas column as a failure of the thermocouple. Then, when the regulator or button is released during ignition, the wick that has just burned goes out again. The fact is that the thermosensitive element should heat up from the igniter while you hold the handle and apply current to the solenoid valve. The latter will hold the mechanism for you when you release it. If this does not happen, then the contact in the circuit is broken or the thermocouple must be replaced. It is better to invite a wizard to perform this operation.

As for the automatic ignition systems, the malfunctions of the gas columns during the ignition process are not limited to the discharge of the batteries, as it is written on many Internet resources. In addition, any more or less modern heater model, even Russian-made, is equipped with an electronic battery discharge indicator. So the user knows when it's time to change them.

The device will not even start the ignition process until the hot water tap opens and the required pressure appears in the network. When it is not enough, then the column will not give any signs of life. The same will happen when there is insufficient gas pressure or after it is turned off as a result of the thrust sensor triggering (until it cools down). It is better to deal with poor gas pressure by a specialist of the corresponding service, you will not be able to do this on your own.

Since we are considering the internal malfunctions of the column, we can name the clogged mesh at the entrance to the water unit as the culprit for the weak water pressure. If the charge of the batteries is normal, the pressure of water and gas is sufficient, and the heater emits clicks of a spark discharge, but the matter does not go further, then proceed to the next section.

Valve malfunctions: diagnostics and repair

The appearance of some problems with the functioning of HBO may indicate precisely the failure of its valve. Often, node breakdowns are as follows:

• Accumulation of third-party fractions in their bodies (dust, debris, etc.);
• Development of internal elements of the part;
• Lack of electricity supply to the valve;
• "Clogged" filter;
• Manufacturing defect.

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

1. Measurement of current indicators at its outputs;
2. Analysis of his work. A working valve always clicks when turning the key in the ignition switch or starting 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 available for most multivalves. Disassembly and assembly of the unit is very easy 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 smallest SSS element can play a crucial role in the functioning of the entire system. We hope the above material was useful for you and provided answers to your questions. Good luck on the road!

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

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.

Main burner does not start

One of the main devices guarding the safety of the unit is a water unit (in a simple way - "frog"). If there is a sufficient pressure of water, the frog with its rod presses the actuator of the gas valve and it supplies fuel to the main burner (in conventional columns). In automatic heaters, the water unit provides fuel access to the igniter, and the gas supply to the main nozzles is already the function of the gas unit.

When the water unit is faulty, fuel will not be supplied to the burner, and in the case of automatic heaters, to the igniter. It happens that when the hot water valve is opened to the maximum, the frog still works, but this only indicates the presence of small cracks in the working diaphragm.You can bring the device to life with your own hands, for this you need to purchase a repair kit and change the membrane, which will be discussed below.

There are often situations in which the wick ignites, but burns poorly, weakly. Looking closely, you will notice that the color of the fire is yellow rather than blue. When fuel is supplied to the main burner, pops are heard due to the fact that it does not flash immediately and has time to fill the combustion chamber. Here, to repair the column, you need to clean the tube and igniter jet. The latter in many models can be easily removed and cleaned, as shown in the video:

Important! Do not insert steel wire into the wick to clean it. It is necessary to use only a thread and a thin wooden stick moistened with kerosene.

Gas solenoid valve device

Electromagnetic type gas valves are composed of electrical and mechanical parts. With the help of the electrical system, the system is controlled, the mechanical one is the executive element. The entire circuit of the device is located in the case. The main working components are the so-called seat and plug. The seat is a hole through which gas flows and which is closed off by a valve. The latter has a design like a plate or a piston. The shutter is attached to a rod, which is part of the electromagnetic system.

The electromagnetic system is a coil within which a core moves. It is connected to the bolt rod. The electromagnet itself has its own plastic body and is located outside on top of the valve body. The counteraction to the work of the electromagnet creates a return spring.

Solenoid gas valves work according to the following principle. In the initial state, when there is no supply voltage at the terminals of the electromagnet, the return spring holds the gate in a certain position. This position often corresponds to a blocked channel in the valve. As soon as the power has appeared, under the action of the magnetic force, the gate core is retracted, overcoming the force of the return spring, and the gate opens the channel. Some valves are brought into working position by manually cocking (opening) the shutter. With the help of the current applied to the electromagnet, the magnitude of the magnetic flux of the electromagnet can be adjusted. Thus, the operation of the valve is controlled, slightly opening it not completely, thereby regulating the gas flow.

The burner shuts down during operation

A failure of the same water unit can also lead to the cessation of the gas supply during combustion. With a large pressure, a frog with a worn-out membrane still somehow copes, but if you open cold water, the pressure drops and the gas column fades out. The same consequences occur when the traction sensor fails. The thermosensitive element is designed to break the electrical circuit when its surface reaches a certain temperature. The sensor is installed near the flue gas outlet and is connected to the solenoid valve by wires.

As soon as the draft in the chimney disappears, the temperature of the flue before leaving the duct will rise sharply, the sensor will heat up and break the circuit. The electric valve, in turn, will shut off the fuel supply. The described element is not eternal, sometimes it also needs to be changed. It is simple to check the performance of the part: you need to unscrew it from the case and, without disconnecting the wires, hang it out. The stable operation of the burner indicates that the sensor is working properly, and the reason lies in the chimney, where, for some reason, the draft has disappeared.

A decrease in draft can appear when the fins of the heat exchanger are clogged with soot, and the water pressure drops if its tubes are covered with a thick layer of scale from the inside. The heat exchanger should be periodically cleaned and flushed.

In addition to the water unit and the clap thrust sensor and the unstable operation of the burner, a malfunction of the temperature sensor can result, and it cannot be repaired, only replaced. True, it is difficult to detect a malfunction in this case. We will advise in a situation where the frog and the traction sensor are completely functional, and the symptoms do not disappear, contact a specialist.

LPG valve functions

Solenoid valves installed on gas equipment are called "multivalves" for the reason that they perform several functions at once. To be more precise, the functional set of most nodes of this type includes:

• The possibility of filling through a special fitting. Thus, the filling function of the valve allows filling the cylinder with fuel through it, if other methods for achieving this goal are not applicable for any reason;
• On the contrary, the possibility of emptying the cylinder through a special fitting;
• Blocking of filling and flow channels by using a valve mechanism;
• Blocking of excessive filling of the cylinder by using a special cut-off with a float;
• Blocking the gas supply through the main line to the motor when it stops working, which organizes the “anti-cotton” function of the valve. This was especially true for the equipment of the first generations, because the slightest problems with the supply of gas to the internal combustion engine were accompanied by the sounds of pops and explosions. It was the multivalve - anti-cotton 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 amount;
• 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 feeding of the engine.

To date, a multivalve in its standard form with a set of the above functions is practically not used, because such an LPG system is not absolutely safe. Despite this, a giant in the field of universal gas valves like Lovato is still releasing them a little bit for sale.

Water leaks

Inside the flow heater, the water pipes are connected to various assemblies using union nuts and rubber O-rings. Homeowners who have not serviced their units for years may find dripping water under the appliance. If this was found, then the repair of the gas column consists in checking all the mates and replacing the seals.

There are other places where water can seep, for example, through the working rod of the water unit. This suggests that at least the replacement of the seal on the frog stem is required, which will require its removal and disassembly. In models equipped with a safety valve, the latter can also leak, especially if it has had to relieve pressure several times. Finally, the most unpleasant situation is a damaged heat exchanger, in which a fistula has formed. It is very expensive to buy a new one, it is easier to repair the old one, which is described in the next section.

Heat exchanger repair

Important! Do not forget to shut off the gas main during any repair work!

It is quite possible to self-repair a crack or fistula in the heat exchanger when the damage to the tube is located on the front side or on the side. Otherwise, the part will have to be removed, for which you will have to disassemble almost the entire column. Problems with soldering the heat exchanger, when the leak is in the back or between the radiator fins, should be entrusted to the master from the service center. To complete the work, you will need:

• powerful soldering iron (at least 100 W);
• fine sandpaper;
• white spirit or other solvent;
• solder and rosin.

To repair the gas column heat exchanger, you must first release water from it. To do this, the common valve is closed, the nearest hot water tap opens and the union nut at the entrance to the water unit is slightly unscrewed.When the water has escaped, the nut is unscrewed completely, the tap on the mixer remains open.

The next step is to carefully sand the damaged area with sandpaper until there is no oxide film left. Then, with a rag moistened with white spirit, the area is degreased. Using rosin as a flux, the fistula is tinned with solder so that its layer is smooth and even. It is necessary to ensure that the solder on the copper surface is not loose, which means that the area is not sufficiently heated. The final stage is the build-up of the tin layer to a thickness of 1–2 mm.

At the end of the soldering, open the common valve and inspect the repair site for leaks. If everything is in order, close the mixer tap and test the column in operating mode.

A self-repaired heat exchanger will still serve for some time, since the medium in it does not heat up above 100 ºС, and the soldering temperature is 200 ºС.

How to replace a membrane in a gas column

As mentioned above, in order to revise the water unit, you will need a repair kit designed for this heater model. Typically, it includes a diaphragm, a spring and a set of seals. An open-end wrench and a regular screwdriver are required from the tool. Before starting work, you need to drain the water from the frog, as described in the case of the heat exchanger.

Now you need to remove the water unit itself. The nut at the water inlet has already been unscrewed, it remains to unscrew the second and disconnect the frog from the gas valve. The type of connection depends on the model and manufacturer of the unit; the tool required for this purpose must be prepared in advance. Then the screws connecting the two halves of the assembly are unscrewed, and the membrane in the gas column is replaced. It is important to install the diaphragm correctly, its position is best remembered when disassembling.

Before installing a new diaphragm, clean the stem (if there is no new one in the repair kit) and replace all O-rings. When the operation is completed, the parts are connected to each other and fastened with screws. They must be tightened in a "star" pattern, when one screw is followed by the opposite, and so on. Water start-up and testing are described in the previous section. Details of the process are shown in the video:

Solenoid gas valves

Devices of this type belong to pipeline fittings and are used to distribute the gas flow and cut it off, if necessary. They are widely used both in individual gas equipment and in industrial. The device is controlled automatically by voltage.

Electromagnetic gas valves are installed at the inlet of the gas pipeline in front of such consumers:

• boilers;
• automobile gas equipment;
• entering a pipe into a multi-storey building.

Most gas valves have a closed design, that is, in the absence of voltage, the valve closes the pipe.