How does a gas reducer work? Operating principle. How to adjust the outlet pressure? (10+)
Gas reducer. Device. Operating principle. Self-repair, setup
The gas reducer (reducing) is designed to obtain a lower, stable outlet pressure from a relatively high, but unstable gas pressure at the inlet. That is, gas under pressure can be supplied to the input of such a reducer within certain limits. Sometimes the upper and lower boundaries of these limits differ from each other by tens of times (for example, from 0.5 bar to 20 bar). At the output, a stable set pressure (for example, 36 mbar) is obtained, regardless of the input.
Application of gas reducers
Reducers are used where it is necessary to reduce excess inlet pressure and stabilize the outlet pressure. In everyday life, we find them in autonomous gas supply systems (this applies to both stationary systems and ordinary gas cylinders), since liquefied gas, in order to remain liquid, must be under a pressure of about 15 bar, and household appliances operate at a pressure of 36 mbar, 20 mbar, or even 10 mbar.
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Hello, after refilling my propane tank again, I had a problem. After turning on the burner, a detonation pop occurs about a minute later. The flame goes out. Replacing the gearbox with a new one did not help. Tell me what needs to be done. Michael
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A reducer is necessary to reduce the gas pressure that comes from a cylinder or gas pipeline to operating pressure and maintain it in the range you need in automatic mode. If there is a change in pressure in the system, this does not in any way affect the operation of the gearbox itself. Gas reducers are divided into two types based on their operating principle.
A simple gearbox consists of the following parts:
- Locking spring.
- Pusher.
- Valve.
- Membrane.
- Return spring.
- Pressure disk.
Direct type gearbox
When the gas mixture passes through the inlet of the fitting and enters the high-pressure cavity, pressure is generated, with the help of which the valve opens. Thanks to the locking spring, pressing the pressure reducing valve directly to the seat, thereby eliminating the possibility of gas mixture entering under high pressure.
The main use of the membrane is, if necessary, it removes the reducing valve from the seat, which leads to a decrease in the pressure of the gas mixture and gas entering the chamber at normal operating pressure. The membrane is affected under all conditions two opposing forces:
- The action on the part of the pressure spring that is necessary to open the valve itself.
- Action from low pressure gas coming from the reducer chamber.
When the pressure of the gas mixture in the working chamber decreases, the spring begins to straighten without feeling any resistance, and the valve begins to open, leaving the seat and accordingly opening the way for a new flow of blue fuel. As the pressure increases, the pressure spring, on the contrary, begins to compress, and the valve is pressed even more tightly against the seat, which in turn limits the penetration of the gas mixture into the gearbox.
The adjustment screw is required to calibrate the operating normal pressure. It affects the compression stroke of the spring itself. When unscrewing the screw, the normal operating pressure will decrease, and when tightening it, just the opposite, it will increase.
Installed pressure gauge directly on the working chamber will allow you to control the pressure at any time of the day. It should be noted that in everyday life, direct-type gearboxes for gas cylinders are not in great demand and have not found wide application.
Reverse gearbox
When the gas mixture passes from the cylinder directly into the working chamber, the valve is compressed, which prevents the gas mixture from flowing further from the reducer. The gas supply can be calibrated with a special adjusting screw, which, when unscrewed, compresses the release spring and, accordingly, bends the rubber membrane. Then, under the influence of forces, the transfer disk is pressed onto the surface of the return spring, followed by its squeezing, which leads to the lifting of the valve and the flow of the gas mixture into the working chamber.
Simultaneously with the increase in pressure in the gas system, the pressure in the working chamber also increases, as a result of which membrane alignment under the influence of a compressed release spring. Then follows the lowering of the transfer disk, which, accordingly, acts directly on the return spring, which forcefully presses the valve into the seat.
As a result of these processes, the supply of the gas mixture from the gas pipeline or cylinder to the working chamber is reduced; accordingly, when the pressure of the gas mixture in the cylinder decreases, a controlled reverse reaction is started. This is how an automatic gearbox system works.
Classification of gearboxes
All automatic pressure calibration devices can be divided into two types:
- reducers for flammable gases (propane, hydrogen, methane, etc.);
- for inert gases (nitrogen, helium, argon, etc.).
Different threads are cut into gearboxes so that the buyer does not confuse the type. Gearboxes designed for work with inert gases, are equipped with a right-hand thread, and with flammable gases they have a left-hand thread.
Gearboxes with oxygen are used when performing work related to soldering, cutting and gas welding. This type of gearbox is also used in medical institutions and even during underwater diving.
Gearboxes designed to work with acetylene are used for cutting pipes and gas welding. This gearbox is widely used at technical stations. service and in auto repair shops when performing straightening and welding body repairs.
Gearboxes designed for working with propane, are used when performing work related to cutting, gas welding and heating. In everyday life, this reducer has become very widespread when using cylinders in houses with no gas mains.
This gearbox has also become widespread in construction, in particular, when laying roofs using bitumen shingles.
Reducers designed to work with air are used to reduce air pressure in pipelines and various air lines; they are also necessary on underwater vessels.
Application of cylinders made of composite materials
This type of cylinders is a new product among containers working with gases. Unlike other cylinders, composite cylinders have greater safety and lighter weight. When a composite container explodes no harmful fragments are formed.
Cylinders made of composite materials also have anti-corrosion properties. This property gives a huge advantage during operation. Do not forget that a number of increased requirements are put forward for containers made of composite materials.
The main task of a household gas regulator when working with composite containers is to constantly maintain a stable operating pressure at the outlet within the range you specify. Gas regulators paired with cylinders of this type must comply with EN 12864 (European standard).
As an example you can use device brand A300i - A310i, the difference from the usual domestic RDGS 1 - 1.2 is as follows:
- equipped with a nut that can be tightened without much effort;
- longer service life of the gasket under the valve itself, which is approximately 10 years;
- To the design difference we can add the placement of a circle-shaped bead in the valve seal and the presence of a recessed spout in the outlet hole. These design features are necessary for high-quality sealing of the connection during assembly.
The regulator can be used either as a universal type or as a cylinder made for a specific model and made of composite materials. The optimal option, of course, is to buy a regulator and a cylinder from the same manufacturer.
A gas reducer is a device designed to reduce the gas pressure in a gas cylinder and maintain this pressure optimal. The gas reducer in the LPG kit (gas equipment for a car) performs exactly these functions: it maintains the pressure value in the gas cylinder that is optimal for correct operation of the system, regardless of the pressure, for example, in the gas pipeline.
The use of gas reducers, however, is not limited exclusively to gas-cylinder equipment in cars. They are used both in household gas cylinders (for example, in the absence of a central gas pipeline in summer cottages), and in industry (when transitioning from a large central gas pipeline to a local network), etc.
Types of gearboxes:- injection;
- vacuum;
- electronic.
Operating principle of the gas reducer
First of all, we note that for proper operation of the LPG kit in general, and the gas reducer in particular, the car should be warmed up, especially in autumn and winter.
Gas from the gas cylinder first enters the reducer, and then into the carburetor or injector. There is a special membrane at the gas inlet and outlet. If the gas pressure is low, the reducer diaphragm keeps the valve open and gas flows into the cylinder until the pressure rises. The valve then closes and no gas can flow. These are both the regulating and control functions of the gas reducer.
How to choose a gas reducer
We advise you to focus on the manufacturing company and choose from market leaders, without skimping on quality. You should also keep in mind the engine power of your car and check whether a particular gearbox is suitable for it.
Adjusting the gas reducer
Adjusting the gas valve is a responsible matter. And you should only take on it yourself if you are an HBO specialist and confident in your abilities. Otherwise, we advise you to contact a professional service center. Moreover, more and more such services have begun to appear in recent years.
Remember that improper adjustment of the gas reducer can lead to gas leakage and uncontrolled increase and/or drop in pressure in the gas cylinder. There is no need to talk about how dangerous this can be.
As a rule, if problems occur in the gas reducer, they can be eliminated by replacing one or another part of the reducer, if the reducer is dismountable. If it is non-separable, then you will need to buy a new gearbox.
If you take on the task of adjusting the gas reducer yourself, then start by setting the idle speed. Then, after each throttle release, unscrew the sensitivity screw a quarter turn until you get the correct response to a sharp throttle opening.
After this you need to adjust the feed. Use the throttle to increase engine speed to 3000 rpm, then tighten the gas supply metering screw (screw) until the speed begins to decrease.
Then you can try it out for a drive and see how responsive the equipment is to your actions.
Installation of a gas reducer
It is better to entrust the installation of the gas reducer, as well as the adjustment, to specialists in service centers. However, we can describe the general installation layout.
The gearbox should be securely secured vertically at three points on the body. It should be installed above the top level of the radiator, as close to the mixer as possible. Gas is supplied to the gearbox through a solenoid valve, which should not come into contact with the body. The adjusting screw and drain fitting must be freely accessible.
The cooling system is connected through conductors and tees. Then install the solenoid valve (it is through it that gas will flow into the cylinder when filling), it must also be securely fastened. After all these steps, a gas line is supplied, it is secured under the bottom of the car using self-tapping screws and brackets away from the heating and moving parts of the car and in no case should it come into contact with the road surface.
The final stages of installing the gas reducer is wiring. You will find the diagram to follow in the instructions for your LPG kit.
The gas reducer is designed to stabilize the operation of the gas supply system. Its main task is to ensure the supply of gas, the pressure of which is optimal for the normal operation of gas pipeline network equipment. The responsibilities of the gearbox include automatically maintaining the operating pressure in the proper condition.
Classification of gas regulators
Before using a pressure reducer, you should familiarize yourself with its types and the main parameters by which these devices are classified.
Principle of operation
According to the principle of operation, gas appliances are of direct and reverse type.
In direct-type gearboxes, the gas passing through the fitting acts on the valve using a spring, pressing it to the seat, thereby blocking high-pressure gas from entering the chamber. After pressing the valve membrane away from the seat, the pressure gradually decreases to the operating level of the gas appliance.
The principle of operation of the reverse type device is based on compressing the valve and blocking further gas supply. Using a special adjustable screw, the pressure spring is compressed, the membrane is bent, and the transfer disk acts on the return spring. The service valve is raised and gas flow to the equipment is resumed.
When the pressure of the system (cylinder, reducer, working equipment) increases in the reducer with the help of a spring, the membrane is straightened. The transfer disk, moving down, acts on the return spring and moves the valve towards the seat.
It should be noted that household reducers for reverse-action gas cylinders are safer.
Installation features
Based on positioning and installation features, devices are divided into ramp, network and balloon.
Ramp gas regulators are necessary to reduce and stabilize the gas pressure level supplied by one source. The devices tend to reduce the operating pressure of gas supplied from a central pipeline or a number of sources. Used for large volumes of welding work. Network stabilizers maintain the low pressure value of the gas supplied from the distribution manifold.
Types of working gas
The specifics of operation, as well as the method of connecting the pressure regulator to the source, depend entirely on the properties of the working gas. According to the material used, the devices are as follows:
acetylene (A);
propanobutane (P);
oxygen (K);
methane (M).
Devices working with acetylene are fixed using a clamp and a stop screw, while for others they use a union nut with a thread identical to the thread of the fitting at the valve.
Housing color and regulator type
Propane reducers are painted red, acetylene - white, oxygen - blue, carbon dioxide - black. The color of the housing corresponds to the type of working gas medium.
Pressure stabilization devices are available for working with flammable and non-flammable media. The difference between them lies in the direction of the thread on the cylinder: for the first it is left-handed, for the second it is right-handed.
Specifications
Gas pressure stabilization devices are characterized by maximum throughput and maximum outlet pressure.
The throughput of the regulator displays the maximum number of cubic meters of blue fuel processed within an hour. Industrial devices are capable of passing up to several hundred cubic meters per hour, while household devices are content with a few cubic meters.
The maximum gas pressure at the outlet is usually 1.6 atmospheres.
Reducers for household cylinders
A special group includes a household gas reducer. It is designed to reduce the pressure of propane, which flows from the cylinder into the furnace or gas boiler. Reducers used for stable operation of the cylinder have different shapes, dimensions, throughput, and weight.
To preserve and transport gas in a compressed and liquefied state, special gas cylinders have been developed - containers in which substances are contained under high pressure. There are two types of cylinders:
- metal,
- composite.
Gas regulator for composite cylinders
Composite cylinders, which successfully replace oversized and unsafe samples, are compact, weigh less and are more explosion-proof, and do not corrode inside. The operating conditions of new type cylinders require the use of regulators that meet the requirements of European standards.
One of these modifications is a reducer for a composite gas cylinder A300i-A310i, which has its own characteristics:
- free-tightening nut;
- Regulator gasket service life is 10 years;
- design that ensures reliable tightness of connections.
Application and selection of gearboxes
Reducers that stabilize the operation of various types of gas are used in many industries, agriculture, construction and medicine.
For example, in the process of gas cutting with welding equipment, gearboxes are used to regulate the supply of oxygen, and acetylene ones are used when working with a car body at a service station or when repairing and installing a pipeline, by public utilities. In the retail industry, carbon dioxide reducers are used to saturate bottled drinks with carbon dioxide.
The main purpose of propane pressure stabilizers is the inlet and regulation of gas from cylinders to gas stoves, although they are also successfully used in construction work with roofing. A propane cylinder reducer is necessary when heating a private home.
When choosing a gas reducer for a cylinder with an outlet pressure regulator, you must take into account all the details: the gas that will serve the device, the type of gas cylinder used, what length and diameter it will have, what type of adapter for the cylinder is used.
If you choose the wrong device, side effects may occur; the regulator may whistle or hum. Therefore, it is recommended to operate gas equipment and regulators from the same manufacturer.
It is important to know why a gas cylinder is equipped with a pressure regulator and why this information is important. Each household regulator for a gas cylinder has its own specific purpose and is designed to work with a specific type of gas. Correct use of gas equipment is a guarantee of uninterrupted supply and safe operation of blue fuel.
Not all settlements and dacha areas are connected to the centralized gas supply. Unfortunately, there are still towns and villages in which bottled gas is actively used. For its 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 reducer for installation on a 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 by the detailed step-by-step instructions. Here you will find rules, compliance with which will protect you and extend the service life of gas installations. The article is illustrated with photographs and supplemented with video tutorials.
Stable operation of the 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 is subject to increased requirements for air exchange with the ability to quickly ventilate in the event of an emergency. The outdoor 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
Based on the type of gas passed through, reducers are divided into the following types, each of which is painted in 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 of threaded connections are usually used:
- 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.
Some simple devices only have 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. At the outlet there is a right-hand 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, stove, 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 a gas stove, then it is necessary to light the burners sequentially. If the flame on each of the burners is not blue, then you need to reduce the pressure on the reducer.
An orange or yellow burner flame indicates incomplete combustion of the fuel. This leads to significant emissions of 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 during system startup, the shut-off valve must be completely closed. 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 correlated 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, they offer a pressure-tested reducer with a pressure regulator in case of using a propane gas cylinder. This option is optimal from the standpoint of 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 acting devices. In the first case, the excess pressure of the incoming gas is directed to open the valve, in the second - the insufficient 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;
- working chamber membrane;
- 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 exiting 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-term and proper operation of the gearbox, it is necessary to periodically carry out simple procedures with 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 a 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 deviation of the 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:
The selection of a reducer for a system based on liquefied gas must be made taking into account the required pressure parameters and the 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.