How to connect a gas cylinder to a stove: diagram, components. Types, design and adjustment of the gas reducer
This regulator (stabilizer) is intended for use with household equipment, it gives precise control of the outlet pressure regardless of the gas pressure entering it.
The regulator (stabilizer) is used in autonomous or stationary gas supply systems and ensures the supply of gas at the required pressure to Appliances, smoothing out possible fluctuations (increases) in pressure and ensuring stable operation of the devices. This reducer is also installed in the case when one pipeline low pressure devices with different input pressure requirements are connected.
Regulates pressure from low to low.
Has in its design:
- underpressure shut-off valve (UPSO)
- overflow shut-off valve
Models
Those. data
- Inlet pressure: up to 400 mbar
- Outlet pressure set: 20 mbar
- Outlet pressure min-max: 18-25 mbar (it is possible to replace the spring with a range of 15 - 37 mbar or 30 - 60 mbar)
- Input thread: G 3/4" internal (right).
- Outlet thread: G 3/4" internal (right).
- Operating temperature range: from -40С° to +60С°
- Capacity: up to 15 kg/h (6-10 m3)
- Weight: ---g.
- Service life: up to 10 years.
Add. information
Examples of the use of stabilizers.Example 1: The pressure in the pipeline is 50 mbar. A boiler with an operating pressure of 50 mbar and a stove with an operating pressure of 30 mbar are connected to it. A stabilizer is placed in front of the stove, which reduces the pressure from 50 mbar to 30 mbar.
Example 2: in a village with main gas, the gas pressure jumps. In the evening, at maximum flow, the pressure is normal. High blood pressure day and night. Installing a stabilizer solves the problem with increased pressure.
Manufacturer - |
Due to rising gasoline prices, many car owners began to equip their “iron horses” with gas equipment (LPG) in order to somehow save their finances. However, along with the new equipment, new troubles also appeared - its maintenance and configuration. Therefore, today we decided to address the problem of adjusting the gas reducer. After all, this must be done not only immediately after installing the LPG on the car, but also during the operation of this system.
The longer the mileage of the LPG and the period of its operation, the more necessary this adjustment becomes. The fact is that over time, rubber elements - valves and membranes - can change their properties, which, in turn, leads to excessive gas consumption. Of course, such consequences can occur only after 3-4 years of operation (this is approximately 100,000 km), but you should prepare for this in advance.
1. Gearbox adjustment: what is needed for adjustment?
Before you begin to get acquainted with the basic methods by which the gearbox is configured, you need to become more familiar with this device and its main characteristics. After all, it is the gas reducer that plays the most important role in the normal functioning of gas equipment. What is its main task? It is thanks to this unit that the driver of a car with gas equipment can reduce the gas pressure that comes from the cylinder. At its core, this is a rather primitive pressure regulator, which allows you to autonomously maintain the same pressure indicator.
But, since nothing in this world is perfect, the pressure may still fluctuate slightly during operation of the gas reducer. In practice it looks like this: when gas consumption is stable, the pressure also remains at a given level, and when it begins to be consumed more intensively, the pressure may drop slightly. Although in general this process does not pose any danger, it is still necessary to be aware of it.
As we already noted in our introduction, gearbox adjustment is necessary during the installation of a new gas equipment on a car, as well as after its long-term operation. But in addition to these factors, the need for the frequency of adjustment and the specifics of performing this task is also associated with:
- generation of gas equipment and, accordingly, the gas reducer itself;
The number of regulators that are available on the gas reducer;
The fuel system on which a car engine runs is gasoline or diesel.
The gas reducer contains membranes that can freeze when low temperatures. For this reason, the gearbox must be connected to the automotive cooling system. If we talk about the operation of this element of gas equipment as a whole, it is important to note next moment: You cannot start the gearbox simultaneously with the engine. First you need to wait until the engine temperature rises to 30-50°C, and after that you can put the gas reducer into operation.
The design of a conventional gas reducer is also simple. In particular, this device consists of the following parts:
- separate chambers, the number of which may vary depending on the type of gearbox (from 1 to 3);
Idle channel;
Evaporator;
A control system that controls the supply of gas from cylinders to the combustion chamber of the engine.
But on modern gas equipment you can find two types of gearboxes. They have a number of very important differences between themselves, which, in particular, has a significant impact on the process of setting them up. Let's look at the features of each of them:
1. Vacuum reducer. To put such a gearbox into operation, you must perform whole line mandatory actions:
- put the switch in the “Gas-Petrol” position;
Turn the key in the ignition;
Warm up the engine.
When the first two instructions are followed, the required amount of gas is pumped into the intake manifold, which will then allow you to start the engine without any problems and hit the road. The same is ensured through work.
2. Electronic device gas reducer. It turns on only when the switch is in the “Gas” position. Similar to the vacuum reducer, we turn on the ignition and give the starter the opportunity to work a little until the required amount of gas collects in the intake manifold and the device itself warms up to the desired temperature.
To properly configure the gas reducer, you need to understand absolutely everything about its settings. So, larger numberpropane type reducers characterized by two regulators, although there are a small number of models with one. And here methane analogues, on the contrary, almost always have only one regulator. Exactly correct setting The gas reducer regulator is main problem for car owners.
Why are two regulators installed on gearboxes? The first of these is the idle air control. In the process of setting up the device, we will need to screw it all the way. But the bottom one is sensitivity regulator. It is he who presses the gearbox membrane. Having become familiar with this device in more detail, you can proceed directly to the setup procedure.
And to the question of what is needed to set up, the answer will be very simple - you need patience and strict adherence to the instructions below. It should also be remembered that you will have to work with gas equipment, so all your manipulations must be extremely careful. If you don't feel confident enough in own strength, it is best to seek help from a specialized car service center.
2. Gearbox adjustment methods
As we have already noted, there are electronic gas reducers and vacuum ones. Setting up each of them has its own characteristics and differences, for which reason we will consider methods for adjusting each of them separately.
Electronic gas reducer - which setting method to choose?
On this type of device, two types of settings must be used:
1. Adjusting sensitivity, or adjusting pressure in the second stage.
2. Adjustment according to the amount of gas that moves through the idle channel.
But before you begin both, there are a few more mandatory steps you need to take. First of all, we start the car engine on gasoline so that it can first warm up to operating temperature. In this case, the idle speed is set between 950 and 1000 rpm. When the engine temperature reaches the required level, turn off the gasoline supply and allow it to burn out the remainder.
After this, we prepare the car for direct adjustment of the gas reducer:
- turn the power register to maximum (if a two-chamber dispenser is installed, then open the first chamber completely, and the second to minimum);
We tighten the idle screw completely, and then turn it back exactly 5 turns;
Set the sensitivity control to the middle position.
Well, first of all, let's start adjusting the idle speed. To do this, we start the car, but on gas. Use the choke and bring the engine to 1700-2000 rpm. Next, you need to simultaneously perform two actions at once: remove the choke a little at a time and rotate the idle speed control until you can find the position in which the largest number of starter revolutions occurs. At the end of this procedure, the choke must be completely removed, and the car must begin to idle stably.
Having set the maximum number of starter revolutions using the idle speed regulator, gradually tighten the gas reducer sensitivity regulator. If during this procedure the number of revolutions begins to change, again try to bring them to the maximum using the idle speed control. If you can’t do anything with this regulator, try tightening the sensitivity screw two turns and repeat the whole procedure again from the very beginning.
The goal you need to achieve is the maximum number of starter revolutions at idle (approximately 1100-1200 rpm), with the sensitivity regulator screwed almost all the way. But driving at such speeds is not recommended, since their value should be below the nominal norm. Therefore, we again tighten the idle speed control until the speed drops to 950-1100 rpm.
Now let's move on to setting the sensitivity of our gas reducer. We also slowly turn off the sensitivity regulator and watch how our actions affect the starter speed, which it performs at idle. When we felt that the number of revolutions began to change, we twist the regulator back a little - about ¾-5/4 turns. Do not forget to also check the engine operation by sharply pressing the gas pedal. If you did everything well, he will respond immediately and without jerking.
When adjusting the gearbox, it is very important not to forget to adjust the power register. To do this, it is necessary to bring the starter of the working engine to 3-3.5 thousand revolutions per minute, while simultaneously tightening the power register regulator. This must be done until the starter speed begins to decrease. To make sure you achieve what you want, try moving the gas metering screw from place to place and unscrewing it about ½-3/4 turn from the found position.
But don’t worry about the fact that there are dispensers that consist of two sections. In this case, all the above steps must be applied only to the first camera, and the second one must be adjusted to only 25-30% of the first. Some gas reducers also have the ability to adjust the pressure in the 1st stage.
To make the adjustment, you need to completely turn off the engine, shut off the line through which the gas flows, and connect a pressure gauge to the cavity of the first stage (it is advisable to use a pressure gauge with a scale of 1.5 kgf/cm2, and it is connected through a control hole, which is turned off using a regulator). After this, we open the gas line again, start the engine idling and bring the pressure of the first stage to 0.38-0.42 kgf/cm2.
Ideally, after adjusting the power register, you need to once again adjust the idle speed and sensitivity of the gas reducer. Only after this can you move on to final stage settings, which consists of several steps:
1. We press the gas pedal very sharply.
2. We turn the sensitivity control 0.25 turns until the intensity of the revolutions begins to decrease very much.
3. We turn the regulator back 0.5 turns and let the engine run a little, carefully monitoring the stability of this process.
What do you need to know about setting up a vacuum gas reducer?
Setting up vacuum type gas reducers can also be done in two ways:
1. The sensitivity and idle speed of the gas reducer can be adjusted separately.
2. The sensitivity and idle speed of the gas reducer can be adjusted simultaneously.
As for the first setting method, it is no different from the process of adjusting the electronic gas reducer, which we have already described above. For this reason, we will look at how to combine these processes.
First of all, we tackle the idle speed. To do this, we start the car, but immediately on gas, not gasoline. Again, using a choke, we level the engine speed to 1700-2000 per minute. We slowly remove the choke and, using the idle speed regulator, achieve the maximum value for the number of starter revolutions (at the end the choke must be completely removed). Using the regulator, we achieve the speed intensity within the range of 1000-1100 rpm and at the end we set the norm - 950-1100 rpm, by tightening the regulator a little more.
Setting the vacuum gear power register is almost the same as setting it on an electronic prototype. In particular, you need to do the following:
- start the engine at idle speed;
We set the intensity to 3000-3500 rpm;
Turn the regulator until the speed starts to drop;
We try to adjust the register regulator, trying all the values;
We unscrew the register regulator by 0.5-0.75 turns, and also slightly adjust the idle speed.
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Reduce propane gas pressure to the level required for a particular job - the main task, which the reducer for a propane cylinder is designed to perform . Without this device, neither gas welding work nor the use of gas cylinders in everyday life would be possible. Below we will talk in detail about the structure, purpose and operating features of the gearbox for a propane cylinder.
General information.
Propane gas, which is naturally found in petroleum gases and is released during oil refining, is used by people for a variety of needs - both at home and at work. In my own way chemical composition Propane is a saturated hydrocarbon, colorless and odorless.
Propane is used:
- for gas welding works;
- for space heating;
- in construction;
- for gas household appliances;
- as one of the types of fuel for cars (considered cheaper and more environmentally friendly than gasoline and diesel fuel).
But since gas is a flammable explosive substance, special cylinders are used to store it in a compressed state. In the middle of the cylinder the gas is under high pressure, and in order to release it outside, you need to regulate the gas pressure at the outlet of the cylinder. This function is performed by a reducer for a propane cylinder. . In addition, the reducer maintains a stable level of operating pressure.
What is a propane reducer?
The design of the gearbox is simple. There is a membrane inside; the device is connected to a gas cylinder with a special nut. There is a key (screw), with which the pressure is adjusted to the required level. There is a pressure gauge on the gearbox, which displays the operating pressure level. On the other side of the reducer, a hose is put on to connect to the gas-consuming device. Propane cylinders are painted red, so the reducer should be the same color. Reducers for other gases have a different color. The gearbox weighs about 0.5 kg.
Propane reducer markings include:
- manufacturer (must be a trademark of the enterprise);
- gearbox brand;
- year of issue.
In addition, the gearbox is supplied with certificates of conformity and safety regulations.
How to choose a reducer for a propane cylinder used in everyday life?
The reducer for a propane cylinder is designed for use in temperate climate, therefore its use is permissible at temperatures from -15 to 45 degrees Celsius.
For precise selection gearbox for a domestic gas boiler, convector or water heater, the technical characteristics of the gearbox should be taken into account:
- Gas consumption.
- Operating pressure.
- Connection method.
The maximum permissible gas pressure at the inlet to the reducer is 25 kgf/cm2, and the maximum operating pressure is 3 kgf/cm2.
For stable operation, the gas consumption of the equipment should not exceed the performance of the gearbox. If the output pressure in the gas reducer is greater than the operating pressure of the gas convector or water heater, the gas burner may go out or the device’s automation may fail.
You can connect the gas consuming device to the cylinder using a regular gas hose. In this case, a gas reducer with a herringbone-type outlet fitting is used. If there are several devices, then you can lay out the gas main using a corrugated pipe. Then you will need a gearbox with a threaded outlet.
Precautionary measures.
Before installing the gearbox, you need to make sure that the device has no cracks or dents on the body and parts, and check how tightly everything fits. Is the glass on the pressure gauge broken or cracked? The use of a gearbox is prohibited. Is the pressure gauge needle stationary even though gas is being supplied? This situation indicates that the device is defective or faulty. Have you carefully inspected the gearbox? Only now can it be turned on. First of all, we slowly open the cylinder valve, then on the reducer, and finally, turn the key on the gas-consuming device. We rotate the adjusting screw on the gearbox, adjusting the operating pressure. We carry out all actions smoothly and slowly, recording any changes, sounds, etc. In the opposite sequence - equipment, reducer, cylinder - turn off the valves.
The gear valve may become clogged, so we clean the gear valve at least twice a year. But it is better to do this with the help of a specialist. If during operation we discover even the slightest malfunction, stop using the device. It is important not to forget to close the valve and also release the gas from the reducer.
Not all settlements and our dacha areas are connected to a centralized gas supply. Unfortunately, there are still towns and villages in which bottled gas is actively used. For his safe use a gas reducer is required - a device that reduces the fuel pressure to the values required for stoves and boilers.
We will tell you everything about the guidelines for choosing a reduction device. The information we provide will help you buy the most suitable gearbox for installation on gas cylinder. We describe in detail the types of devices and the criteria according to which preference should be given to a particular model.
Those wishing to independently install and connect the reduction device will be helped in detail by step-by-step instruction. Here you will find rules, compliance with which will protect you and extend your service life. gas installations. The article is illustrated with photographs and supplemented with video tutorials.
Stable work gas system depends on the quality and compatibility of all its components. When choosing a gearbox, it is necessary to take into account the compliance of its parameters with the needs of the devices connected through it.
Area of application of devices
For a gearbox, the following indicators are considered as the main characteristics:
- the type of gas that passes through the device;
- method of connection to the system;
- output pressure range;
- maximum performance;
- Operating temperature range.
Cylinders with reducers can be installed inside or outside the house.
The room in which the equipment is installed must be presented with increased requirements to air exchange with the possibility of quick ventilation in the event of an emergency. Street option saves space inside the building and is safer in case of flammable gas leaks.
The pressure reducing device is designed to reduce the pressure of the gas pumped into the cylinder to the operating values necessary for the normal functioning of gas equipment
According to the type of gas passed through, reducers are divided into following types, each of which is painted a specific color for additional identification:
- acetylene – white;
- hydrogen – dark green;
- oxygen – blue;
- propane-butane – red;
- methane - red.
The color marking of gearboxes manufactured outside of Russia may differ.
The reducer, designed for a cylinder with a propane-butane mixture, is painted red. Devices designed for other gases cannot be used for liquefied hydrocarbons.
The characteristics of the purchased gearbox must correspond to the parameters of the device with which it will be installed. Correct calibration of the output gas flow power is also important.
If the pressure value goes beyond the permissible range, the automation of a modern gas appliance will turn it off. If it is not equipped with such protection, then an emergency situation may arise.
Gearboxes, as potentially dangerous equipment, are subject to mandatory certification. If you have doubts about the factory origin of the purchased device, you must request a certificate of conformity.
System connection standards
To connect the reducer to a gas cylinder or to a supply line, 3 standards are usually used threaded connections:
- W 21.8 x 1/14– cylindrical thread standard DIN 477/T1, in Russia the abbreviation SP 21.8 is often used for it;
- G– cylindrical pipe thread, where the number after the letter indicates the nominal diameter in inches;
- M– metric thread, where the first number after the letter indicates the nominal diameter, and the second – the thread pitch in millimeters.
Symbols "LH" indicate that a left-hand thread is used.
For various types gas cylinders use different standards of threaded connections. This fact must be taken into account when purchasing a gearbox (+)
Some simple devices are equipped with only one connection option. Thus, the popular Type 724B gearbox from the Italian manufacturer “Gavana Group S.p.A” is equipped with a left-hand input thread W 21.8 x 1/14 for a standard metal cylinder. The output is right half-inch internal thread for connecting a bellows liner without any adapters.
A more complex device Type 733 with a pressure regulation function from the same manufacturer already has 6 options for inlet threads: for metal and composite cylinders, for a multi-valve and 3 more connections. This model also has 3 output thread options.
If the input or output threads of the gearbox do not match or liners, then use special adapters. However, the number of such connections must be minimized as they increase the risk of leakage. With standard gas equipment, it is not difficult to find a reducer with a suitable connection format.
Installation and startup procedure
First of all, installation is carried out without connecting it to the cylinder. Then the reducer nut is installed on the cylinder valve and after that the hoses are connected to it.
During this operation, the taps of the gas-consuming appliance, floor-standing gas boiler, the plates must be in the “closed” position. Before attaching the gearbox, to loosen the spring, you must turn out the adjusting screw until it stops.
The type of adjusting screw in the form of a valve is more convenient than a device that needs to be tightened with a screwdriver. However, it is necessary to limit children's access to such a device.
If you use an ordinary flexible hose, then to simplify the procedure, the reducer fitting can be moistened with water. This connection must be secured with a screw clamp. Bellows hoses are connected using a threaded adapter, which is screwed in instead of a fitting.
After installing the system, it is necessary to check for gas leakage with the devices not working. To do this, you need to tighten the gas flow valve (if there is one) and unscrew the adjusting screw to loosen the spring as much as possible.
If, after establishing the pressure difference, the pressure gauge needle shows a gradual increase in pressure, then the reducer cannot be used.
After assembling the entire system, it is necessary to ensure the flow of gas from the cylinder to the reducer and by rotating the adjusting screw to set the required outlet pressure. Then you need to coat the connections from the cylinder to the consuming device with a soapy solution to check them for gas leaks.
If the consuming device is gas stove, then you need to light the burners sequentially. If there is no flame on each burner blue color, then you need to reduce the pressure on the gearbox.
An orange or yellow burner flame indicates incomplete combustion of the fuel. This leads to significant emissions carbon monoxide, which can be dangerous when using the stove for a long time
When checking the functionality of the burners at minimum heat, there may be a problem with their attenuation. To solve this, you need to either slightly increase the output pressure using the regulator on the gas cylinder reducer, or change the position of the flow screw on the stove itself.
If the problems described above are not typical for all burners, then the jets on the problematic parts of the stove need to be cleaned or replaced. If a gas leak occurs when starting the system, it is necessary to close it completely shut-off valve. Then you need to ventilate the room and begin troubleshooting.
Required pressure and volume
The throughput of the reducer must ensure the operation of all devices connected to the system at maximum gas consumption. Some of the problem in determining the required parameters is the use of different units of measurement.
There are two pressure units for gas appliances: pascals (Pa) and bars (br). For a gearbox, the inlet pressure is determined in megapascals (1 MPa = 10 6 Pa) or bars, and the outlet pressure in pascals or millibars (1 mbr = 10 -3 br). The conversion of pressure values between these units of measurement is carried out using the formula:
1 br = 10 5 Pa
The volume of gas passed through the reducer and consumed by the devices can also be represented by two quantities: kilograms and cubic meters.
The input and output pressure parameters of most Russian devices are indicated in pascals. On foreign devices, as a rule, pressure is indicated in bars
The indicators can be compared using data on the density of the main bottled gases(kg/m3) at a temperature of 19 0 C and standard atmospheric pressure:
- nitrogen: 1.17;
- argon: 1.67;
- acetylene: 1.10;
- butane: 2.41;
- hydrogen: 0.08;
- helium: 0.17;
- oxygen: 1.34;
- propane: 1.88;
- carbon dioxide: 1.85.
When recalculating indicators for household stoves, a problem may arise related to the proportion of propane and butane in gas cylinders. Their percentage ratio for different climatic regions is regulated by GOST 20448-90.
The density of the gas mixture depends on its percentage composition. For example, with a stated ratio of 60% propane and 40% butane, the gas density can be calculated as follows:
q = 1.88 * 0.6 + 2.41 * 0.4 = 2.09 kg/m3.
So, if the maximum gas flow rate of a four-burner stove is 0.84 m 3 /hour, then the reducer must also provide the same volume. In terms of kilograms, this value will be 2.09 * 0.84 = 1.76 kg/hour.
GOST 20448-90 allows a fairly wide range of percentage values of both gases in the propane-butane mixture. This creates some uncertainty when calculating its density
To the calculated value of the maximum throughput of the gearbox you need to add 25%.
This is due to the following reasons:
- gas mixture parameters may vary depending on the region, time of year and supplier;
- The density of the gas, which is taken in the calculations, depends on its temperature;
- there may be a loss of elasticity of the spring, which regulates the volume of the low-pressure chamber in the gearbox, resulting in a decrease in its maximum throughput.
Sometimes complete with modern equipment offer a parameter-tested reducer with a pressure regulator in case of using a propane gas cylinder. This option is optimal from the point of view fire safety and system performance.
Design features and maintenance
Problem-free operation of the system is impossible without regular maintenance and elimination of minor gearbox faults. To do this, you need to know the design of the device and the signs of typical problems.
Diagram of direct and reverse acting devices
According to the type of design, gearboxes are divided into direct and reverse action. In the first case, the excess pressure of the incoming gas is directed to open the valve, in the second - the lack of pressure in the working chamber of the device.
The design of single-chamber direct and reverse acting gearboxes is simple. The absence of complex components is the reason for a long service life without breakdowns if the product is made with high quality
The basic elements of both types of gearbox designs are the same:
- fitting through which gas is supplied;
- high pressure gauge showing the pressure value of the gas supplied to the device;
- a return spring that works to close the valve;
- high pressure chamber;
- a valve whose position regulates the volume of gas passed through;
- a safety valve that is triggered when unacceptable pressure is reached in the working chamber;
- low pressure pressure gauge, which determines the value of the working gas pressure;
- working chamber (low pressure);
- an adjusting screw that determines the position of the membrane;
- main spring;
- membrane working chamber;
- pin between the main spring and the bypass valve.
Reverse-acting gearboxes have become more widespread because they are more reliable.
There are models equipped with a pneumatic pressure sensor, where instead of the main spring, gas acts on the membrane, ensuring the balance of the system.
As a rule, the adjusting screw is tight. This is due to the prevention of spontaneous changes in position under the influence of forces directed at the membrane. When it rotates clockwise, the volume of the working chamber decreases and the pressure of the escaping gas increases.
In ordinary gearboxes, the unevenness of the output pressure depends on the value of the input pressure and, as a rule, reaches 15-20%. Two-stage (or two-chamber) models are used when it is necessary to maintain the exact pressure of the exhaust gases.
Such gearboxes have a more complex design and slightly larger dimensions. They cost more than their single-stage counterparts. Therefore, if there is no need, their use is inappropriate.
Periodic inspection and service work
For long and proper operation In order to maintain the gearbox, it is necessary to periodically carry out simple procedures on it. Once a week you need to record the pressure gauge readings. As the elasticity of the springs decreases, a slow but constant decrease or increase in pressure is possible.
The following actions must be performed once a quarter:
- Check the tightness of the mating gaskets, safety valve and pressure gauges with the device body. This procedure can be performed by applying soap solution to areas of possible gas leaks.
- Bleed the safety valve and to prevent it from sticking. To do this, it is necessary to connect the gearbox to a source of compressed air and, with the outlet closed, increase the pressure until the protective mechanism is activated.
Repair and maintenance work that involves physical impact on the device body (including tightening threaded connections) cannot be carried out when the gearbox is under pressure.
This is dangerous due to the release and ignition of flammable gases. In addition, a sudden depressurization of the device may occur with possible physical harm to people in the room.
Gas service specialists are required to conduct an annual technical inspection of equipment, identify non-compliance with safety requirements and issue instructions with an algorithm for eliminating them
Typical faults and their repair
Gas leaks and pressure deviations outside the standard range can be eliminated independently. The first problem may be caused by the following reasons:
- depressurization of the housing;
- membrane damage.
The passage of gas through a loose connection of the housing elements can be eliminated by replacing the liner or using silicone sealant. The damaged membrane must be replaced with a similar element from the repair kit.
The reasons for the deviation in pressure value may be:
- Spring problem. It is necessary to disassemble the gearbox and determine the cause of the malfunction. If the spring is displaced, it must be corrected; if broken, it must be replaced. If there is a loss of elasticity, then it is enough to place a hard gasket under it.
- Leakage of compressed gas in devices with a pneumatic principle of pressure on the membrane. It is very difficult to fix the problem on your own. The gearbox needs to be replaced.
- Membrane problem. If a rupture occurs, it is necessary to replace the device assembly, and if there is a loss of tightness at the connection points with the washers, this malfunction must be eliminated by tightening the edges.
- Bypass valve problem. If the rubber gasket is worn out, it must be replaced. If the movement of the rocker arm is disrupted, the hinges must be replaced.
Considering the low cost of gearboxes, it is advisable to repair it only if a quick replacement is impossible. If, as a result of actions with the device, it was disassembled, then for safety reasons it is necessary to check its tightness during the first start-up.
Conclusions and useful video on the topic
Video #1. Design of a simple gearbox for five-liter cylinders:
Video #2. An example of repair of common gearboxes of the BKO series:
Selecting a gearbox for a system based on liquefied gas must be done taking into account the required parameters of pressure and volume passed through. Simple maintenance and timely elimination of minor faults will allow the device to perform its functions for a long time and efficiently.
Please write comments in the block below. Tell us about the choice of reducer that you installed on the gas cylinder, write about the rules for operating the device. Ask questions, share your opinion and photographs on the topic of the article.
The reducer for a gas cylinder is designed to reduce the gas pressure at the outlet of the gas container to operating and automatic maintenance this pressure at a given level. According to the conditions of GOST 13861, gearboxes are classified:
They differ in the color of the body and the connecting devices for fastening. Main parameters:
- inlet pressure: up to 250 atmospheres for compressed gases and up to 25 atmospheres for liquefied gases,
- outlet pressure: typical 1 – 16 atmospheres,
- gas consumption: tens to hundreds of m3/hour.
The price of a gas cylinder reducer is determined depending on the configuration, technical parameters, accuracy class of the device, country of manufacture. You can buy a reducer for a gas cylinder with one or two pressure gauges. If there is only one pressure gauge, then it can be used to set a fixed output operating pressure. The presence of two pressure gauges allows you to control the pressure both in the gas container and that supplied to the consumer.
Adjustable reducer for gas cylinder
Such devices are intended for use in conjunction with gas burners and other gas equipment operating with higher gas outlet pressure. For example, BPO 5-2 can be installed on household gas vessels with a volume of 5 to 50 liters with a valve. This model is equipped with a pressure gauge and a valve to regulate the gas pressure at the outlet. Specifications BPO 5-2:
- outlet pressure: 2.5 MPa
- maximum working pressure: 0.3 MPa
- highest throughput: 5.0 m3/hour
- weight: 0.42 kg
- gas type: liquefied
Devices with an adjustment function are also available for compressed gases.
Reducer for household gas cylinder
These products are designed to reduce and automatically maintain the vapor pressure of liquefied hydrocarbon gas in a given range. They differ in the method of attachment to gas vessels. For vessels (volume 5 l, 12 l, 27 l) equipped with a valve, a propane reducer RDSG 2-1.2(9), 16/3.6 atm, fitting 9 is used. When it is put on the neck of the valve, the locking ring is tightened on the reducer, which is released after landing in place. For gas vessels with a volume of 50 liters, equipped with a valve, propane reducers RDSG 1-1.2(9), 16/3.6 atm, fitting 9 are used, where the connection occurs through a 
nut. A disposable gasket is installed between the fitting and the nut. The reducer for a composite gas cylinder complies with European safety standards, has a built-in mesh filter, and is designed for connection to the valve of a gas composite vessel according to the German KFL standard. We also manufacture adjustable gearboxes for composite tanks, for example N 240, low pressure, for propane - butane, with the ability to adjust 20-40 mbar, outlet: 3/8 inch, internal right-hand thread. There is a pre-installed gasket designed for 10 years of service.
Gas cylinder reducer device
Gearboxes may vary in design, but the principle of operation 
unit It is based Feedback between the pressure in the gas vessel and the pressure at the outlet of the reducer, carried out using membranes, valves and springs. These products are single-chamber, double-chamber, direct-acting, reverse-acting. In practice, reverse-action devices are most applicable as they are the most convenient and safe.
