the main task gas reducer consists in reducing the pressure of the gas coming from the gas pipeline or cylinder to the working value and maintaining it in the specified range in automatic mode. In this case, changes in the pressure of the gas mixture entering the reducer for the gas cylinder should not have any effect on the operation of the device. Despite the clarity and conciseness of the definition of the method of operation of the gas reducer, according to the principle of operation, they can be divided into two completely different types.
When passing through the nozzle and gas penetration into the chamber high pressure the action is noted to facilitate the opening of the valve. The pressure reducing valve is pressed directly to the seat due to the closing spring, which thereby eliminates the possibility of high pressure gas access.
The main task of the membrane is to remove the pressure reducing valve from the seat, which helps to reduce the gas pressure and its entry into the chamber already with the working pressure. It can be said that the membrane is exposed to two opposite forces:
- Pressure spring action required to open the valve
- Low pressure gas action from the reducer chamber
When the gas pressure in the working chamber decreases, the pressure spring straightens, the valve leaves the seat and opens the way for a new portion of blue fuel. With an increase in pressure, the spring, on the contrary, is compressed, pressing the valve even more tightly to the seat, which limits the flow of gas into the reducer.
The adjusting screw makes it possible to adjust the working pressure by changing the pressure on the spring. Obviously, when turning it inside out operating pressure will decrease, and when screwed up, it will increase.
A pressure gauge installed on the working chamber will allow you to monitor the pressure at any time. It should be noted that in practice, reducers for direct-type gas cylinders have not found too widespread use.
Reverse type
When gas enters the working chamber from the cylinder, the valve is compressed, which prevents the flow of fuel. The feed can be adjusted with a special screw, which, when turned out, compresses the compression spring and bends the diaphragm. In this case, the transfer disc is pressed against the return spring, the valve is lifted and gas penetrates into the working chamber. How is the working pressure regulated in automatic mode?
Simultaneously with the increase in pressure in the gas pipeline, the pressure in the working chamber also increases, as a result of which the diaphragm is straightened under the action of a compressing spring. This lowers the transfer disc, which acts on the return spring, which, in turn, pushes the valve into the seat. As a result of this, the supply of gas from the cylinder or gas pipeline to the working chamber is reduced, respectively, with a decrease in the gas pressure in the pipeline, a reverse reaction is triggered.
Scheme of the reducer operation for gas of direct (a) and reverse (b) types. 1. Stop spring 2. Valve 3. Pusher 4. Diaphragm 5. Pressure disk 6. Spring
Classification according to the application
In general, all automatic pressure control devices can be divided into reducers for inert gases (nitrogen, argon, helium, etc.) and combustible (hydrogen, propane, methane and others). In order not to be confused, the gearboxes are equipped with different threads.
So, combustible gas reducers have a left-hand thread, and inert gases (including oxygen) - a right-hand thread.
- Oxygen reducers are used in the production of work related to cutting, brazing and gas welding. Also used in medical facilities and diving.
- Acetylene reducers are used for pipeline cutting and gas welding. In addition, they are actively used in car repair shops and service stations when carrying out body repairs.
- Propane reducers are used when carrying out work related to gas welding, cutting and heating. In addition, they are used to organize high-quality gas supply from cylinders to gas stoves, as well as in construction, in particular, when roofing with the use of bituminous tiles.
- Air reducers are used to reduce air pressure in networks and various air communications, they are also in demand on submarines.
Features of using composite gas cylinders
This type of cylinders is an innovation among gas tanks. Compared to their predecessors, composite cylinders are comparatively lighter and safer. When such a container explodes, no fragments are formed at all.
Another indisputable advantage of composite gas cylinders is the absence of corrosion processes inside. Along with this, a number of increased requirements are imposed on devices operated together with composite containers.
The main task gas regulator when working together with composite cylinders, it is necessary to maintain a stable outlet pressure in a given range. Paired with containers of this type regulators are used that comply with the standards of the European model EN 12864.
An example is the A310i-A310i device, which differs from the usual RDGS 1-1.2 in the following:
- Complete with a nut that can be screwed in without the use of great efforts;
- Longer service life of the gasket under the valve, which is at least 10 years.
The design features include the presence of a spout recessed in the outlet opening and a circular shoulder located in the valve seal. These design features are aimed at creating a better sealing of the connection.
At the same time, one should not confuse gearboxes with regulators for composite tanks, which, by creating an optimal fuel supply pressure, regulate its consumption, measured in liters per minute.
The regulator can be used as universal type, and manufactured for a specific model of the composite container. The optimal solution the purchase of a cylinder and a regulator from the same manufacturer is considered.
How to choose
One of the most common choice in this class of devices is the RDGS-1 device, the main advantages of which are affordable cost and simplicity of design. RDGS-1 is produced in Russia and Belarus, below are the main characteristics of the device:
- Inlet pressure value 0.07 - 1.6 MPa
- Outlet pressure value 2950 - 3300 Pa
- Gas consumption 1.2 m3 / hour
- Weight 310 gr
- Operating temperature range -30 ° С + 45 ° С
Reducer RGDS-1
Instead of the time-tested RDGS-1 gearbox, the price of which is 150-200 rubles, you can buy a more modern model. For example, the Italian device m714, which costs a little more (about 250 rubles).
Typically, this reducer is supplied with a Pullover1 gas-type heater, but it can be purchased separately. The reducer is equipped with a gasket made of elastic material, which has a five-time use. The inlet pressure of the m714 is between 0-20 bar and the outlet pressure is 30 mbar.
Often, to connect composite cylinders to burners, a German-made GOK model is used, which costs about 500 rubles. However, there are also more expensive models.
So the N240 gearbox, which costs more than 1000 rubles, has the following characteristics:
- Inlet pressure up to 18 bar
- The value of the outlet pressure is adjustable within the range of 20 - 60 mbar
- Productivity - 4 l / hour
- Operating temperature range -20 ° С + 50 ° С
Reducer N24
In the environment of gas cutters, another type of gearboxes, called miniature, has become widespread. A striking representative of this class can be considered a gearbox general use BPO-5, main technical characteristics which are:
- Inlet pressure up to 2.5 MPa
- The value of the outlet pressure up to 0.3 MPa
- Weight 0.65 kg
It must be remembered that the purchase and installation of a reducer for a gas cylinder is a serious and responsible step. Not only the quality of work largely depends on the correct choice gas appliances, but also the safety of everyone who will use this device.
The gas reducer in the gas supply system performs an important stabilizing function. Due to it, variable and high pressure is smoothed to more or less constant, thereby ensuring the normal and safe operation of the equipment.
Reducer "Frog" for a gas cylinder Reducers are used almost everywhere when it comes to gas equipment, whether it is devices operating on combustible (methane, hydrogen, etc.) or inert (nitrogen, helium, etc.) gases. A typical household example is a gas cylinder reducer, also known as a frog.
It is familiar to almost all owners of individual (autonomous) sources, who are forced to purchase such because of the remoteness from the mains and, for this reason, the lack of connection to the centralized gas supply. must remain at a pressure of about 15 bar, while for consumer devices it is normal between 10 and 36 mbar.
If propane is not first passed through the reducer, then the results of direct connection may come as a complete surprise to you. This is all the more true for compressed gas cylinders (eg methane at a pressure of 250 bar). "Frog" is inexpensive, and it is easier to get one than to spend money on eliminating the consequences of the disaster.
Motorists who have equipped their cars with economical LPG equipment are also familiar with this device. Liquefied (or compressed) gas in such systems is also preliminarily sent to the reducer of the propane-butane mixture (or methane), and only then enters the carburetor or injector.
The gas reducer is also used in industry. In places of transition from major highways to local networks a significant reduction in pressure is required. Powerful and dimensional products are used here. Another example is reducers for gas tanks involved in the supply industrial facilities or human settlements.
Classification
It legitimizes the requirements for products GOST 13861-89. He, in particular, establishes the classification of these devices, given in table. one.
Table 1
| Reducer type | The largest throughput V, m3 / h | The highest gas pressure at the inlet P1, MPa (kgf / cm2) | The highest working pressure P2, MPa (kgf / cm2) | Weight, kg, no more |
| BKO-25 | 25 | 20 (200) | 0.8 (8) | 2.0 |
| BKO-50 | 50 | 1.25 (12.5) | 2.1 | |
| BKD-25 | 25 | 0.8 (8) | 3.5 | |
| BAO-5 | 5 | 2,5 (25) | 0.15 (1.5) | 2.2 |
| BAA-5 | 3.6 | |||
| BPO-5 | 0.3 (3) | 2.0 | ||
| BVO-80 | 80 | 20 (200) | 1.25 (12.5) | 2.1 |
| SKO-10 | 10 | 1.6 (16) | 0,5 (5) | 1,8 |
| CAO-10 | 0.12 (1.2) | 0.1 (1) | ||
| SPO-6 | 6 | 0.3 (3) | 0,15 (1.5) | |
| SMO-35 | 35 | |||
| RKZ-250 | 250 | 20 (200) | 1.6 (16) | 13,0 |
| RKZ-500 | 500 | |||
| RAO-30 | 30 | 2.5 (25) | 0.1 (1) | 8 |
| RAD-30 | 10 | |||
| RPO-25 | 25 | 0.3 (3) | 8 | |
| RPD-25 | 10 |
As you can see from the table, each device is designed not only to work for a specific purpose, but also for a specific gas. And if propane is indicated as the reduced gas in the marking and documentation of the product, then such a reducer gas propane is only allowed to be supplied, and an attempt to pass another gas (eg methane) through it may be unsafe to health.
In order to avoid misuse, already in the very appearance of the devices during manufacture are laid additional measures precautions. So, for reducers for combustible gases (e.g. methane), the connecting elements are with the left thread, for non-combustible (e.g. nitrogen) - with the right one. Color highlighting is also used to differentiate.
Attention should also be paid to throughput, which determines the gas flow rate provided by the device. Before choosing a specific model, you should make sure that this indicator is sufficient for the consuming equipment used.
Device and scheme of work
The basic structure of all gearboxes is similar. The weight and size characteristics may differ component parts, them design features etc. The scheme of operation is similar to that observed in the float chamber.
In the cavity of the body, which has inlet and outlet nozzles, a membrane is located between two washers, balanced from above by a spring abutting against the plane of the body, and from below by a rocker pivotally connected to the inlet valve. At low pressure, the spring exerts enough force on the diaphragm to keep the inlet valve open, allowing the gas to pass through the device with little or no resistance.
High pressure gas reducer diagram
When the pressure rises to a certain threshold value, the membrane begins to compress the spring, at the same time covering the inlet valve with the rocker. The pressure level required for these actions is determined mainly by the following parameters:
- the size of the membrane;
- spring characteristics;
- force required to do the work to close the valve.
In this case, the propane reducer can be equipped with a mechanism for adjusting the operating pressure within certain limits, or manufactured without it (the "frog" is an example of an unregulated option). Products designed to work as part of an automotive system are also customizable (methane products usually have one regulator, propane products have one or two).
The supra-membrane part of the housing can have an opening at the top and thus communicate with environment... There are also sealed models. They lack an opening and a spring, and instead of the latter, the cavity is filled with gas, which ensures equilibrium with its pressure. Combined products are also available.
Here the pressure of the methane flowing through the reducer (for example) is controlled simultaneously by the action of both the spring and the gas. The opening at the top in such gas ramps performs the function feedback... It connects the product to the volume into which the gas is directed, thus establishing the dependence of the pressure in the reducer on the pressure in the volume (that is, the supply is proportional).
Adjustment and repair
It is possible to set up and repair the gas reducer with your own hands using the available tools and a repair kit, but only if you know exactly what you are doing. Insufficiently qualified adjustment and assembly can have detrimental consequences. The main signs of abnormal product operation are as follows:
- deviation of the outlet pressure from the permissible limits;
- leak of gas.
The pressure deviation is usually caused by a breakage or displacement of the spring, or by the release of the compensating gas that performs its function due to the depressurization of a part of the body. But if the malfunction of the spring still has to be eliminated with the help of a repair kit, then the version with gas belongs to the category of non-repairable (the device changes completely).
Gas leakage can be caused by diaphragm damage, body leakage, or inoperative float valve. If the latter starts to pass gas, this can also manifest itself in the consuming product (for example, in gas water heater). Since the pressure at the outlet of the reducer is approximately equal to the inlet pressure, in the absence of flow (the consumer is temporarily turned off), leakage will be inevitable.
Such a malfunction is difficult to diagnose for the reason that turning on the consumer device normalizes the situation. It can be determined only by measuring the gas pressure at the outlet of the reducer in the absence of consumption (as a rule, it should not exceed the nominal by more than 20%).
Most problems can be eliminated by adjusting (modifying) the product or replacing some of its component parts with new ones taken from the repair kit.
But it is worth noting that gearboxes are collapsible and non-separable (sealed) designs. The latter must be replaced only as a whole.
So, having stocked up with the appropriate repair kit, the product must first be disassembled. Visually inspecting the spring and diaphragm removed from the body, you should establish which of them caused the malfunction. A broken spring must be replaced with a new one from the repair kit.
If the spring did not break, but simply squeezed, losing elasticity from time to time, you can not change it, but simply pick up and put a gasket on the side of the body required thickness without covering the existing hole.
If the membrane ruptures, it should be replaced using a similar one from the repair kit, but, as a rule, it is not easy to make a tight connection with the washers that surround it. Therefore, if you are unsure of your skill, think about the advisability of purchasing a new gearbox.
If the spring and diaphragm are intact, pay attention to the bypass valve.
This is a tube with a small hole, from the end of which a rocker is pressed through a rubber gasket. There are several typical problems with valve performance:
- the normal course of the rocker arm is disrupted;
- worn or damaged rubber gasket;
- the end of the tube is deformed.
Valve adjustment is a simple process. The rocker arm mobility can be restored by turning or replacing its hinges. The damaged gasket should be cut off and glued instead of a similar in size from the repair kit. The roughness and evenness of the end of the tube, ensuring a snug fit of the gasket, are achieved by grinding it.
If the failure of the reducer consists in gas leakage due to leaks in the places where the diaphragm meets the body, then the broken integrity can be restored using silicone sealant... When making adjustments or repairs and for any other reason not initially related to depressurization, it will not be superfluous to also apply a sealant in these places, which will prevent a similar problem in the future.
Upon completion renovation works it is necessary to immediately check the tightness of the product with a soap solution. If there are no bubbles that indicate leaks, the gearbox should be re-checked after one day, then a few more days later. Subsequently, it is recommended to carry out periodic checks (eg monthly).
Like any other gas-related equipment, the reducer will do a good job provided the right choice models and simple measures to promote safe operation. Periodic maintenance and timely troubleshooting will keep you out of trouble.
The pressure reducing device for gas cylinders is designed to stabilize the gas pressure and bring it to operating parameters at the outlet from the cylinder. In other words, if there is a high or unstable gas pressure at the inlet, then this parameter becomes low and constant at the outlet. In the article, we will consider what a gas reducer for a cylinder with a regulator is, its application and principle of operation.
Features of devices
Thanks to the reducer, the working pressure remains constant even when the gas pressure in the cylinder changes.
The devices differ in the principle of operation (direct or reverse) and are produced for reduction various gases: hydrogen, propane-butane, oxygen, acetylene. Structurally, they have two or one stage and the ability to set the operating pressure by a pneumatic or spring device.
Depending on the type, for a gas cylinder with a pressure regulator, it is painted in different colors.
The device is connected using nuts corresponding to the thread of the union on the valve. The exception is the acetylene reducing devices, which are attached to the cylinder using clamps with stop screws.
It is important that reducers for cylinders with flammable gases have a left-hand thread, which excludes their connection to oxygen. Cylinders with inert gases or oxygen-containing gases have a right-hand thread.
The reducer is selected depending on the parameters of the inlet and outlet pressure.
Application of devices
The use of reducers is due to their property of lowering and stabilizing gas pressure and is used both in home and agriculture and in medicine and industry.
This is required in such cases:
- a reducer with a regulator for a household gas cylinder - used in household autonomous gas supply systems and in cylinders supplying gas to hobs;
- in automotive gas equipment - before supplying liquefied gas to the engine;
- on main pipelines - for diversion natural gas in settlements where the pressure is significantly lower;
- at the supply to welding, locksmith and heating equipment;
- to provide medical care;
- when conducting construction works- propane gas reducers for cylinders with a regulator are used for bitumen flooring and roofing materials.
Gas pressure regulators
Gas distribution can also be done using pressure regulators. They make it possible to maintain a constant pressure level at the tapping point, independent of the volume of gas consumed. These devices are used to complete contemporary Example such a device can be a "Gok" regulator with a gas reducer for a cylinder.
When the initial high pressure is applied, the throttle of the regulator automatically sets the opening value to the desired value, which leads to a change in hydraulic pressure and a decrease in the working pressure of the gas stream.
The support of the obtained value with the help of regulators is realized in two ways - before oneself or after by influencing the moving component through the diaphragm head.
Depending on the type of force applied to the moving system, regulators are divided into lever and spring.
The principle of the direct gearbox
Structurally, all gas reducers for a cylinder with a regulator are arranged in a similar way, differing only in the dimensions of the device and holes, the area of the diaphragms and the size of the springs.
The design of a conventional direct gas reducing apparatus is a two-chamber (high and low pressure) cavity with a separator in the form of a rubber membrane; there are nozzles at the inlet and outlet of the cavity. IN modern models there is also a third input for connecting a pressure gauge.
The supplied gas moves along the hose and, passing through the inlet fitting, enters the first chamber. The fuel pressure tries to flip off the valve, which is supported on the other side by a closing spring - it returns it to its seat. Moving in this direction, the valve prevents high pressure gas from flowing freely from the cylinder.
The diaphragm is the second acting force, which has the opposite effect, trying to lift the valve from its seat and open the path to the high pressure gas. That is, a situation is created in which, on the one hand, the opening pressure spring presses on the diaphragm, and on the other, the gas entering the low-pressure chamber.
When the gas escapes, the working pressure in the chamber decreases, and the spring straightens out, pushing the valve and allowing a new portion of gas to enter the device. At the same time, the pressure begins to rise, pressing on the spring and returning the valve to its place, thereby blocking the gas flow. Then the process is repeated.
It should be noted that adjustable reducers for a gas cylinder of a direct type have not found widespread use due to complex design, in contrast to the reverse, which are considered even safer.
Reverse type reducer
Gearboxes of this type have the opposite principle of operation from the one described above.
Liquefied gas is fed into the high pressure chamber and, having accumulated, does not allow the valve to open. After turning the knob, which ensures the flow of gas to the consumer, the screw starts to press on the pressure spring. In turn, it shrinks and presses on the membrane, which opens the valve slightly, increasing the gap. Through this gap, the gas enters the low pressure chamber.
This leads to an increase in pressure not only in the chamber, but also in the cylinder and in the hose. Under this action, with the help of a spring, the diaphragm straightens, the pressure increases and the transfer disc, lowering, weakens the return spring. This, in turn, seeks to return the valve to its place and close the gap, limiting the flow of gas and reducing the pressure. From this point on, the process starts over.
In general, the principle of operation of a gas reducer for a cylinder with a regulator resembles a float chamber.
Gearbox selection
There are several factors to consider when choosing this type of device.
These include:
- An important parameter of the reducer operation is the maximum gas flow rate, which is determined by the size of the inlet valve opening. In other words, this is an indicator of how much the reducer will allow gas to pass completely open valve at a given inlet pressure.
- When choosing a device, you need to pay attention to the presence of a seat for a pressure gauge - with it it is much easier to regulate the compression of the spring to obtain the desired outlet pressure.
- By choosing gas bottle it is important to remember that now the old ones have been replaced by new composite cylinders, safer and less heavy.
- When choosing, you need to pay attention to whether there is a nut for manual adjustment, for the life of the membrane, the tightness of the structure, for the method of attaching the hose to the fitting (thread or clamp).
- When buying, take into account the type of gas that will be filled into the cylinder, flow rate and outlet pressure.
The best characteristics according to reviews and widespread use were obtained by a gas reducer made in Italy for a cylinder with a M714 regulator.
Overview of gas regulator models
It is worth noting that this device is not universal - each model is designed to work with a specific gas, therefore, when buying, you must definitely study all the characteristics of the product.
The main comparative overview characteristics for widely used gearboxes can be seen in the table below.
Inspection and service
In order for the gearbox to work properly long time, you must follow simple rules.
They are as follows:
- At least once a week, it is required to record the readings of the pressure gauge for control, since the elasticity of the springs may fall over time, and then a constant change in pressure will be observed up or down.
- At least once every three months, using a soap solution, check the tightness of valves, gaskets and a pressure gauge at the joints with the device body.
- With the same frequency as in the previous paragraph, blow through the safety valve to prevent it from sticking. To do this, the reducer is connected to the compressed air supply, the outlet is closed and the gas pressure is increased until the protection is triggered.
- Do not service or repair the pressurized device to avoid leakage, release or ignition of the gas.
- At least twice a year, it is necessary to clean the reducer valve from blockages.
- Before switching on, inspect the device and the pressure gauge for damage.
Precautions and Possible Malfunctions
To fix problems with the device, you need to invite a specialist, but some of the problems can be solved on your own.
A damaged diaphragm or a leaking casing can cause gas leakage and pressure deviations from the specified values. In this case, replace the membrane and liners with a sealant. To restore pressure, check the location and suitability of the spring - it may move or need to be replaced.
It is difficult to make repairs in pneumatic gearboxes, therefore, in the event of a breakdown, they are completely replaced. Loss of tightness in the joints is eliminated by tightening the washers. When the rubber gaskets are worn out, they are replaced with new ones. After the repair, the gearbox is checked for tightness.
Experts advise making repairs only in cases where it is not possible to quickly replace the device itself. In other situations, it is better to buy a new device based on the low price of this equipment.
Due to the rise in 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 have appeared - its maintenance and adjustment. Therefore, today we decided to turn to the problem of adjusting the gas reducer. After all, this must be done not only immediately after installing the LPG equipment on the car, but also during the operation of this system.
The more the LPG mileage 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 about 100,000 km of run), but you should prepare for this in advance.
1. Adjustment of the gearbox: what do you need to adjust?
Before you start getting acquainted with the main methods by which the gearbox is set up, it is necessary to familiarize yourself in more detail 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 LPG. What is its main task? It is thanks to this unit that the driver of a car with LPG can lower the gas pressure that comes from the cylinder. At its core, this is a rather primitive pressure regulator that allows you to autonomously maintain the same pressure indicator.
But, since nothing in this world is perfect, during the operation of the gas regulator, the pressure can still fluctuate slightly. In practice, it looks like this: when the gas flow rate is stable, the pressure is also kept at a given level, and when it starts to be consumed more intensively, the pressure may drop slightly. While this process is generally safe, you still need to be aware of it.
As we already noted in our introduction, the gearbox adjustment is needed during the installation of a new LPG unit on the car, as well as after its long-term operation. But in addition to these factors, the need for the frequency of adjustment and the features of this task is also associated with:
- the generation of gas equipment and, accordingly, the gas reducer itself;
The number of regulators that are on the gas regulator;
The fuel system that the car engine runs on is gasoline or diesel.
The gas reducer contains diaphragms 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 HBO element as a whole, then it is important to note the following point: it is impossible to 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 start the gas reducer.
The design of a conventional gas reducer is also straightforward. 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);
Idling channel;
Evaporator;
A regulating system that controls the supply of gas from cylinders to the combustion chamber of the engine.
But on modern HBO, 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 consider the features of each of them:
1. Vacuum reducer. To start up such a reducer, it is necessary to execute whole line required actions:
- put the switch in the "Gas-Petrol" position;
Turn the key in the ignition lock;
Warm up the engine.
When the first two instructions are followed, the required amount of gas is injected into the intake manifold, which will then allow you to start the engine and hit the road without any problems. The same is achieved through work.
2. Electronic device of the gas reducer. It turns on only in the position of the switch to the "Gas" position. Similar to the vacuum reducer, we start the ignition and give the starter the opportunity to work a little until it collects in the intake manifold required amount gas, and the device itself does not warm up to the desired temperature.
To properly configure the gas regulator, you must understand absolutely everything in its settings. So, morepropane type reducers are characterized by two regulators, although there are a small number of models with one. And here methane analogs, on the contrary, almost always have only one regulator. Exactly correct setting the regulator of the gas reducer is the main problem for car owners.
Why are two regulators installed on the gearboxes? The first one is the idle speed regulator. In the process of setting up the device, we will need to screw it all the way. But the bottom one is sensitivity adjuster... It is he who presses the gearbox membrane. Having become familiar with this device in more detail, you can go directly to the setup procedure.
And to the question of what is needed for setting, the answer will be very simple - you need patience and strict implementation of the instructions below. You should also not forget that you will have to work with gas equipment, therefore, all your manipulations must be extremely careful. In the event that you do not feel enough confidence in own forces, it is best to seek help from a specialized car service.
2. Methods of gearbox adjustment
As we have already noted, there are electronic gas reducers and vacuum ones. Setting up each of them has its own characteristics and differences, which is why we will consider the methods for adjusting each of them separately.
Electronic gas regulator - which setting method should I choose?
On this type of device, two types of settings must be applied:
1. Sensitivity adjustment, or pressure setting in the second stage.
2. Adjustment according to the amount of gas that moves through the idle channel.
But before proceeding with both, it is necessary to carry out a few more mandatory actions. First of all, we start the car engine on gasoline so that it can warm up to working temperature.In this case, the idle speed is set in the border between 950 and 1000 rpm. When the engine temperature reaches the required level, turn off the gas supply and allow it to work out the remainder.
After that, we prepare the car for direct adjustment of the gas reducer:
- we turn the power register to the maximum indicator (in the event that a two-chamber dispenser is installed, then we open the first chamber completely, and the second - to a minimum);
We turn the idle screw completely, then turn it back exactly 5 turns;
We set the sensitivity regulator to the middle position.
Well, first of all, let's start setting up the idle speed. To do this, we start the car, but already on gas. Use a choke and bring the engine to 1700-2000 rpm. Next, you need to simultaneously perform two actions at once: remove the suction a little and rotate the idle speed control until you can find the position in which the largest number of starter revolutions occurs. In this case, at the end of this procedure, the suction must be completely removed, and the car must start to idle stably.
After setting the maximum number of starter revolutions with the idle speed regulator, gradually tighten the gas pressure regulator sensitivity regulator. If in the process of performing this procedure the number of revolutions begins to change, again try to bring them to the maximum with the help of the idle speed regulator. If you can't do anything with this regulator, try turning the sensitivity screw two turns and repeat the entire procedure from the beginning again.
The goal that you need to achieve is the maximum number of starter revolutions at idle (approximately 1100-1200 rpm), with the sensitivity control turned almost all the way. But it is not recommended to drive at such speeds, since their value should be below the nominal rate. Therefore, we again tighten the idle speed control until the speed drops to 950-1100 rpm.
Now let's move on to adjusting the sensitivity of our gas reducer. We also slowly turn off the sensitivity regulator and watch how our actions affect the revs of the starter, which it carries out at idle. When we felt that the number of revolutions began to change, we turn the regulator back a little - about ¾-5/4 turns. Do not forget to also check the operation of the engine, for which sharply press 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 turning the power register regulator. This must be done until the number of revolutions of the starter starts to decrease. To make sure you get 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 do not whine about the fact that there are dispensers that consist of two sections. In this case, all of the above actions must be applied only to the first camera, and the second one should be set only by 25-30% of the first. On some gas pressure regulators, it is also possible to adjust the pressure in the 1st stage.
To make the adjustment, it is necessary to completely turn off the engine, close the line through which the gas flows, and connect the 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 muffled by a regulator). After that, 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, it is necessary to re-adjust the idle speed and sensitivity of the gas reducer. Only after that you can proceed to the final configuration stage, which consists of several steps:
1. Step on the gas pedal very sharply.
2. We turn the sensitivity regulator by 0.25 turns until the speed of the revolutions begins to drop very much.
3. We turn off the regulator by 0.5 turns and let the engine run a little, carefully monitoring the stability of this process.
What you need to know about setting up a vacuum gas reducer?
Setting up gas reducers vacuum type can also be done in two ways:
1. Adjustment of sensitivity and idle speed of the gas reducer can be carried out separately.
2. Adjustment of sensitivity and idle speed of the gas reducer can be carried out simultaneously.
As for the first adjustment method, it is no different from the adjustment process of the electronic gas regulator, which we have already described above. For this reason, we will look at how to combine these processes.
First of all, we take up idle. To do this, we start the car, but immediately on gas, and not on gasoline. Again, using the suction, we level the engine speed to the amount of 1700-2000 per minute. We slowly remove the suction and, using the idle speed regulator, we achieve the maximum value of the number of starter revolutions (at the end, the suction must be completely removed). With the help of the regulator, we achieve the speed of revolutions in the range of 1000-1100 rpm and already at the end we set the rate - 950-1100 rpm, screwing the regulator a little more.
Setting up the power register of a vacuum reducer is almost the same as setting it up on an electronic prototype. In particular, the following steps must be taken:
- we start the engine at idle speed;
We set the intensity to 3000-3500 rpm;
We twist the regulator until the revolutions begin to fall;
We try to adjust the register regulator, trying all values;
We turn off the register regulator by 0.5-0.75 turns, and also slightly adjust the idle speed.
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Not everyone will afford the construction of a country house with all the amenities. Some part of the population is content with small plots from wooden houses where they come for the weekend. Gas pipe there is no point in pulling to the house, and it is expensive, but connecting a gas cylinder to the stove will be very useful. And it is inexpensive, and you can do it yourself.
Do you know what needs to be done to properly connect the cylinder to the stove? If not, then after reading this article to the end, it will not be difficult for you to connect yourself.
What you need to connect
- Gas stove. It shouldn't be quite old. Be sure to check the integrity of the connections and cooking zones.
- Gas reducer (30 mbar). Experts consider the most reliable gearboxes with threaded connections and brass nuts.
- Gas hose. It should be 1.5 meters longer. For example, if it is 5 meters from the installation site of the plate to the cylinder, then you need 6.5 m, this is necessary so that the hose is not connected in a taut state, so it can crack faster.
- Fittings and clamps for connections. This is necessary if you decide to use an old stove, with new models such adapters are already included in the kit.
- The tool is necessarily copper-plated or brass-plated. Safety rules provide for working with gas connections only with such keys, they do not give a spark in case of accidental breakdowns.
- You will need flax or fum tape as an additional sealing material.
- Soap solution.
A special gas hose must be used for the connection. When buying from a store, explain this to the seller. Under no circumstances should you use the old hose that was in your basement, even with good appearance there may be internal cracks in it and the consequences will be dire.
The order of work
We will assume that the stove is already installed in the kitchen. The gas cylinder must be located in another room or at least 1 meter away from the stove. The place for the bottle must be clean and prepared. Build a custom mount with wooden slats.
If a shielded balloon is used, the distance can be reduced to 0.5 m.
Plate connection
First you need to connect the hose to the stove. This is a completely safe job. We screw it onto the hose of the stove, tighten it with a clamp and, screwing the fum tape onto the inlet fitting of the stove, we wrap it all the way.
Tank connection
First you need to install a reducer on the cylinder. It is screwed onto a special adapter with the accompanying wrapping of the fum tape.
The entire connection process should take place with a thorough examination of every detail:
- The reducer and the cylinder must be free of contamination, especially at the place of threaded connections.
- The hose deserves special attention. In addition to the appropriate length, it must be free of cracks and narrowing, and do not allow it to twist. It is also better to replace it after the expiration date.
- There should be no rust on the clamps during operation, this can lead to their rupture. When corrosion appears, it is better to immediately replace them or purchase specialized ones with anti-corrosion treatment.
When you have finished all the work, you need to check the integrity of the connections. Open the gas cylinder valve carefully. You will hear a characteristic hiss. This means that the reducer is in good working order and gas began to flow into the stove.
Then you need to dilute a little soap with water, it is advisable to add more soap so that the foam is thick. Foam with a soft sponge and apply to each connection, if small bubbles appear, this indicates that the connection is not reliable and needs to be tightened.
If there are no shortcomings, then you did everything right and you can turn on the stove and cook.
A propane-butane mixture is heavier than oxygen and, according to the laws of physics, is capable of accumulating in closed, unventilated spaces. Therefore, experts do not recommend installing a gas cylinder in an underground room. It will be enough to place it in the next room.
The main safety rules are spelled out in SNiP 42-01-2002. And if you have carried out such work, then your knowledge will help readers to correctly connect the equipment.
Video
If you are concerned about your own safety and the safety of your home, choose the right gas cylinder. And this story will help you with this.