Where are compressors used? What does the compressor do and their types

Rarely does an enterprise do without the use of compressed air. At some enterprises, it is used to apply coatings to various surfaces, at others to ensure the operation of stamping equipment. A compressor is used to obtain compressed air.

Purpose and principle of operation

What is a compressor? The official definition is as follows - a device designed to compress gases and pump them to consumers is called an air compressor. How does he work? The principle of operation of the device is quite simple, atmospheric air enters the mechanism that compresses it. For this, different methods can be used, they will be discussed below. The mechanism that compresses the air determines the design and principles of the compressor. For efficient operation of the equipment, it must be connected to the electrical network and the air network, through which compressed air will be transmitted. The electric motor connection diagram is usually indicated in the operating instructions.

Compressor types

On the industrial equipment market, there are many proposals for the supply of these devices. It can be divided into those that are used in industry and that are used in everyday life, for example, to inflate car wheels. All of these devices can be operated from different types of drives. An electric air compressor 220 V, as the name implies, operates from an electric power unit with a voltage of 220 V. But, there are also devices operating from a voltage of 380 V.

Diesel compressor, powered by an internal combustion engine that runs on diesel fuel. The use of such equipment is quite popular among builders; it is used when there is no possibility of connecting electric installations. Diesel-fueled units enable operation at remote construction sites.

Atmospheric air is supplied to the cylinder head, in which the pistons are mounted. The power plant, in turn, transmits torque to the shaft, which ensures the movement of the pistons in the cylinder. It is there that the air is compressed to the required parameters. After being compressed, it is directed to the plant's air system. Reciprocating compressors are divided into oil and oil-free. The oil one is distinguished by the fact that for its effective operation, special oil is poured into it, which reduces the frictional force between the rubbing parts and the device nodes. This increases its service life.

There are many ways to transfer torque from the engine to the actuator. In the manufacture of compressors, couplings or belt drives are often used. The device on which the latter type is installed is called a belt compressor.

The listed types of equipment are used in almost all industries, they differ from each other in performance, size and a number of other parameters. But, of course, the main characteristic is the amount of pressure that the compressor can create.

This is a rather complex device, its design includes oil scraper rings, filters for oil and air purification, control automation, and this means that qualified personnel and special tools and devices are required to maintain this device in working order.

Diaphragm compressor

The gas is compressed in such a device under the action of a membrane, which performs a reciprocating motion. The diaphragm is driven by a rod, which is attached to the crankshaft.

The diaphragm plate is fixed to the working chamber and thus there is no need to use additional parts, for example, piston rings, sealing devices, etc.

The membrane type air compressor has the following parameters:

• tightness;
• resistance to corrosion;
• high compression level;
• reliable design;
• operational safety and ease of maintenance.

The membrane-type belt-driven compressor differs in that the working medium comes into contact only with the membrane and the internal cavities of the chamber. However, it does not come into contact with the atmosphere. Such a device is used for pumping harmful and toxic substances.

Another advantage of the membrane product is that it does not need to be lubricated, which reduces the risk of contamination of the transported working medium.

Positive displacement compressors

A device in which the process of obtaining compressed air occurs by reducing its volume is called a positive displacement compressor. These include the following types of equipment:

• oil-free screw compressors;
• diesel piston compressors;
• household air compressors.

Screw Compressors

The history of this equipment began in 1934. The screw compressors are distinguished by high reliability, small dimensions, low metal consumption, which led to a high consumer demand for equipment of this class. The use of this equipment allows you to reduce electricity costs by up to 30%. Plants of this type are installed in mobile compressor stations, ship and other refrigeration units.

As a working body, screw rotors with depressions are used. They are installed in a housing that can be disassembled along several planes. It has holes and grooves for mounting and bearings. In addition, suction and air discharge chambers are formed in the housing. Pumps of this type are distinguished by their performance.

These products can develop pressures from 8 to 13 atm., While the air flow rate can be from 220 to 12400 liters per minute.

Quite often, one unit of such equipment can replace several units of compressors installed in production workshops.

When installing and putting into commercial operation of such compressors, it is advisable to install a device at the inlet to clean the air from excess moisture. Some manufacturers complete their products with such filters.

Rotary vane compressors

Compressors of this class operate on the same basis as reciprocating ones, that is, on displacement. Energy transfer takes place during compression. During suction, the working medium enters the working chamber, its volume decreases with the movement of the rotor. This compression leads to an increase in pressure and the escape of compressed air through the pipe.

Compressors of this type can create pressures up to 0.3 MPa, are called blowers, and those that generate higher pressures are called compressors.

Devices of this type have the following advantages:

More stable, balanced stroke, provides no reciprocating motion. This equipment is designed for direct connection to an electrical power unit. The weight of a rotary compressor will be lower than a reciprocating compressor with similar characteristics. The design does not include the use of valves. That is, the number of parts rubbing against each other decreases.

Dynamic compressors

Compressors of this group are divided into two types - centrifugal and axial. In the former, the air is thrown to the outer part of the impeller under the influence of centrifugal force. Thus, a rarefied space is formed on the suction side. Gas constantly enters the working chamber, after passing the wheel, the air is directed to the diffuser (flow rate damping device), where, in fact, its pressure rises.

In axial-type equipment, air moves along the rotor, and compression is carried out as a result of changing the speed of its movement between the blades of the rotor and the guide device.

These compressors can be classified according to the following properties:

1. The outlet pressure, those that provide a pressure in the range of 0.015 MPa, are called fans or blowers.
2. By the number of compression stages.
3. In the direction of air movement. If it moves along the axis of the rotor, then it is centrifugal, if it moves across, then it is axial. There are devices where air moves diagonally.
4. By the type of drive - it can be electric, steam or gas turbine.

Rotary compressors are used in aircraft engines. With its help, air is forced into the combustion chamber.

Compressor capacity

This term means the volume of gas that is pumped in a certain unit of time. The unit of measurement of productivity is m 3 per minute. This parameter can be specified either at the input or at the output, of course, these will be different numbers. The thing is that when the pressure changes, the volume changes. This characteristic indicates performance at a working environment temperature of 20 degrees Celsius.

Depending on the value of this characteristic, the following groups are distinguished - high productivity (over 100 cubic meters of air per minute), medium (up to 100 cubic meters of air per minute) and small (up to 10 cubic meters).

Dynamic devices have some advantages over piston devices. They are distinguished by their simplicity of design and operation. They have small overall and weight parameters. Smooth air flow and they do not require additional lubrication. Their installation does not require the manufacture of massive foundations. But, at the same time, their efficiency is somewhat lower than that of piston ones.

These compressors have found their way into many industries. For example, the chemical and oil and gas industries, metallurgy, mining and many other industries. One of the types of dynamic compressors - turbocompressors, is installed in gas-pumping pipelines.

For many years of operation of such equipment, many devices with different characteristics have been designed and put into operation, in particular, modern machines are capable of providing a capacity of up to 200 m 3 per minute, at a wheel speed of 250 revolutions per second. And all this with small dimensions and weight parameters.

Compressor aggregation

The process of mounting a compressor and a power plant on a frame is called aggregation. Due to the fact that piston-type devices have vibration, it is necessary to design and manufacture the foundation taking into account these characteristics.

Feature of oil-free appliances

These devices have found their application wherever it is necessary to ensure high requirements for air purity. They are installed in medical institutions, pharmaceutical and chemical industries. In fairness, I must say that these devices are among the most affordable devices in terms of their cost. These compressors are easy to operate and maintain. This means that there is no need for trained personnel, and no special requirements are imposed on their installation in the workplace.

However, oil-free compressors have some disadvantages, such as excessive noise that occurs during operation. But, manufacturers were able to solve this problem by installing soundproof casings on these products.

When choosing an oil-free compressor, you need to pay attention to the power of the device, their performance and working pressure parameters, which are shown by the devices installed on the compressor. We must not forget about the volume of the receiver. As a rule, containers with a volume of 50 liters are installed in the compressor device.

The advantages of oil units

The most common method of reducing the friction that occurs during the operation of various parts and assemblies is to lubricate them. This allows you to reduce the load on the product as a whole, in particular, on its key part - the engine.

To solve this problem, special compressor oils are used, which can be used in various operating conditions.

Compressors of this type are cheaper to manufacture. Therefore, the cost of such equipment is significantly cheaper than oil-free counterparts. But in operation, they are more expensive. This is due to the fact that during operation, along with the removal of air from the working area, oil is thrown out. By the way, it must be replaced every 2,000–3,000 operating hours.

Since the compressed air contains oil microparticles, it is necessary to install oil trapping elements in the system, for example, filters. After a certain amount of time, they also need to be replaced, and this complicates maintenance, and requires additional costs for the purchase of replaceable filters.

However, in spite of the measures taken, it is not possible to completely clean the air passing through the oil compressor. For example, after processing air on a screw device, its contamination is 3 mg per cubic meter. The purity of air after processing it on a reciprocating compressor directly depends on the level of wear of its parts and assemblies.

This has led to the fact that in some technological processes the use of oil compressors is prohibited.

Features of operation

The normal operation of the compressor primarily depends on the operation of all its components and assemblies. In particular, intake and exhaust valves. Inside the compressor, where the air distribution takes place, a certain number of spools, distributors and valves are installed. The following types of valves are installed in compressors - poppet, plate, spindle, etc.

In order for the equipment not to reduce power indicators and not consume excess power, the valves that are installed in the compressor must be ground in and must not allow air to pass through. When these valves are depleted, they must be urgently replaced. Increased air consumption can sooner or later lead to a reduction in the life of the equipment.

A delay in the actuation of the valve leads to the appearance of knocking, a knock indicates that the seat is wearing out. In addition, a knock may indicate that its upper part has been pinched in the case.

The quiet operation of the compressor is a kind of indicator of the quality of the setting and, accordingly, the operation of the device as a whole.

Safety regulations

Compressor installations of various operating principles and purposes are widely used at construction sites and production. Compressors can be permanently installed on concrete foundations or mobile, that is, mounted on a chassis.

Normal use of compressor equipment is permissible subject to a number of conditions:

1. The compressor must be fitted with automatic devices to prevent the permissible operating limit from being exceeded.
2. A relief valve is provided to quickly relieve excess pressure.
3. On this equipment, filtering devices must be installed at the inlet and outlet, which ensure the purity of the air sent to the compressor for treatment and create an obstacle to its entry into the room.
4. The presence of installed pressure gauges provides control over the pressure parameters generated by the compressor.
5. An oil separating filter must be installed between the compressor unit and the receiver.
6. In addition, air containing toxic or harmful substances must not be supplied to the compressor stop.

The installed equipment must be properly supervised and maintained. It should be remembered that maintenance and routine maintenance should be carried out by trained personnel. The equipment that is under the supplier's warranty must be serviced by specialists from the appropriate service centers.

In particular, when flushing compressor units and parts, only those liquids and compositions recommended by the manufacturer of this equipment should be used. Storage tanks, compressed air must be equipped with safety valves, drain cock, pressure gauge. In accordance with the requirements of the operational documentation, these containers (receivers) must undergo routine maintenance and testing. Their results should be recorded in the service log.

When organizing the operation of compressor and related equipment, it is necessary to use guidelines and other regulatory documents promulgated by control bodies, for example, Rostekhnadzor.

Compressor equipment selection criteria

What should the consumer be guided by when choosing an air compressor. Most importantly, he must understand for what purposes the purchased equipment will be used. It should be noted right away that there are separate industries, and only compressors operating without oil can be used in technological operations.

The key parameters of the compressor equipment are:

1. Air consumption (performance).
2. Operating pressure.
3. Requirements for air purity.

As a rule, these parameters should be determined by process engineers who develop technological processes involving compressor equipment.

For example, air flow can be calculated as follows:

1. Calculation of the amount of air in continuous operation.
2. Making adjustments to the obtained value, taking into account the operating time of the equipment per shift or day.

When selecting equipment, it is necessary to take into account the growth in the number of compressed air consumers.

Compressor equipment control systems

Control equipment is installed to ensure that the air is under constant pressure in the compressor systems. The simplest system consists of a pressure sensor and the simplest setting system. It allows you to maintain a constant pressure in the receiver. If the set parameters are exceeded, the compressor is turned off, and after the pressure has dropped to a certain minimum, the automatic system is triggered and the compressor turns on. Such, or almost such systems, are installed on almost all compressor plants. Their presence ensures the safe operation of the equipment.

Household appliances

Household compressors are used to perform certain jobs that are performed at home or in the garage. Typically, these are small, electrically driven reciprocating compressors. The power of such a product is 2.2 kW. Such compressors are able to pump air up to 8 atm.

For the most part, they can safely provide a pressure of 10 atm. Receivers with a capacity of up to 100 liters are used for storing compressed air.

As a rule, they are used when performing painting work, indoor and outdoor.

We learned what a compressor is thanks to the invention of a pump with a piston, which became the prototype of a modern device. The compressor was invented by the German physicist Otto von Guericke, who lived in the 17th century. In the 18th and 19th centuries, the prototype of the modern energy machine for pressurization contributed to the development of metallurgy and mining.

The main task of the then still called blowers in metallurgy was to supply air to blast furnaces, later open-hearth furnaces or converters to ensure a complete combustion process.

Now, what is a compressor - a device that creates an outlet pressure above atmospheric.

Types of compressors according to the principle of operation

According to the principle of operation or a feature of the pressure increase process, the types of compressors depend on the design of the device and are divided into two large groups: volumetric and dynamic.

• The volumetric principle of operation, the working process is carried out as a result of a change in the volume of the chamber and is subdivided into piston, screw, rotary-gear, membrane, rolling rotor, liquid-ring, spiral, etc.
• The principle of dynamic action is the interaction of rotating blades with the supplied gas, and are divided into centrifugal and axial.

It is interesting to use the type of compressors in internal combustion engines, where they have already become a component of aircraft. Airplanes are known to fly at high altitudes, where significantly less oxygen is available for combustion. The introduction of pressure boosting power machines as air blowers allowed aircraft to fly at high altitudes without reducing engine power.

Similar devices work on the same principle on some modern cars. They receive energy directly from the engine shaft and help fuel the combustion chamber to increase power.

It is clear that in order to increase the power of a car engine, it is necessary to either increase the volume of the combustion chamber or the amount of fuel burned. Increasing the volume of the combustion chamber and the engine as a whole is not always advisable. It is easier to increase the amount of fuel, however, for fuel combustion, a certain amount of oxygen is required, which is insufficient at normal pressure. And this is where the type of compressor comes to the rescue, which, by compressing, injects more air with oxygen under pressure, and, thus, the engine's power increases dramatically.

Various types of compressors are used in various types of installations: chemical, refrigeration, energy, auto repair shops, for pneumatic tools, installations for dental offices, general and home use, for example, when brewing coffee even in a coffee machine.

Equipment for the production of food products and packaging also needs this type of device.
Such power machines are used to increase the pressure in industrial enterprises, ranging from powerful automatic booster types of compressors, stations consisting of many low and high pressure units, systems for drying, purifying and cooling air, having unified control and monitoring, to automatic blowing units with low pressure devices. pressure.

A compressor is a device designed to pump compressed air or gas. It is used to operate a pneumatic tool, circulate refrigerant refrigerant in a closed loop, and pump pressure into various containers. This equipment is widely used in medicine, industry and everyday life. Its presence allows you to perform a wide range of actions.

Design and types of structure

The compressor is an automatic air pump. It provides an overpressure air or gas supply. The device can be powered by an electric motor or an internal combustion engine. The supercharger design often provides not only a pump, but also a special metal receiver for pressurization.

According to the principle of operation of the pump itself, the device can be:

• Screw.
• Piston.
• Membrane.

There are also several more technological varieties of devices for air injection, but they are more rarely applicable due to the high cost of production or low efficiency.

Screw

The screw is an expensive design used in industrial facilities. It is based on a special auger that captures air or other gas according to the principle of a meat grinder screw. It mixes with the oil inside the blower to provide more efficient air intake. The resulting mixture is supplied under pressure, after which it is filtered and the purified air is supplied to the outlet. There are also more expensive oil-free designs used by the chemical and pharmaceutical industries, as well as in dental clinics, where clean air without the presence of oil microparticles is important.

The screw design is very reliable, but in the event of a breakdown, repair costs can be up to half the cost of the unit itself. Although the device has such a disadvantage, its advantages are still quite large:

• Low noise level.
• Minimum heating.
• The efficiency reaches almost 98%.
• Low energy consumption.

Piston

The piston design is more budgetary, so most compressors are made exactly according to its principle. It is an engine that, when the piston rotates, sucks the flow into the compression chamber, and then pumps it further along the circuit. A special valve at the intake does not allow air to escape back through the inlet. Piston devices are less reliable but not expensive to buy and maintain.

If we compare the piston design with the screw design, then it loses in all respects, except for dimensions and cost. It should be noted that the difference in price between the two types is so great that the piston version is chosen even despite its disadvantages:

• High noise level.
• Low efficiency.
• Constant overheating.
• Vibration during operation.
• Frequent breakdowns.

Membrane

The diaphragm compressor, in contrast to the first two varieties, is mainly used at industrial facilities to work with various gases. In everyday life, such a design can be found in refrigeration units and on mini airbrushes. It is very rare to see ordinary household blowers of this type on sale. The principle of their operation is that as a result of the oscillatory movements of the engine, the rattling of flexible membranes is carried out, which compress and expand gases, ensuring their transmission under high pressure. This design is very successful. It has a number of advantages:

• Compact size.
• High pressure creation.
• Prevention of the supply of mechanical impurities.
• Easy maintenance.
• Robust casing to prevent gas leaks.

Despite the listed advantages, this type, although not difficult and expensive to maintain, still requires periodic replacement of the membrane, which loses its elasticity, especially when working with aggressive gases. It is also worth noting that although industrial machines are relatively small in size, their body is made of thick-walled steel, which significantly affects the weight of the equipment.

Target variety of compressors

Compressors differ among themselves not only in the principle of operation, but also in their intended purpose. According to this criterion, they are divided into the following types:

• Gas.
• Air.
• Circulating.

Gas are used for pumping pure gases and their mixtures. They are installed at filling stations for filling cylinders with oxygen, hydrogen and other substances. They are not designed for air service and are specially designed to prevent the formation of electrical sparks, which can be dangerous when working with some explosive gases.

The air compressor is the most common. It can be found in car repair shops and tire shops. It is such a device that provides pumping of the wheels of cars, and also supplies compressed air to the spray gun used for painting tasks. The air blower powers the pneumatic tools used by builders and auto mechanics.

Circulation compressors are a narrowly directed version, the main task of which is to ensure continuous pumping of air or gas in a closed loop. Such a device does not have a storage receiver. Often, such devices are used to circulate freon or other refrigerant in refrigeration equipment. Most often, a membrane structure is used for these purposes.

Which compressor to choose for home or work

Reciprocating air compressors with a storage tank are predominantly chosen for home use, for use in auto repair shops or for solving construction problems. Although they are inferior to steel structures in terms of durability, they are relatively cheap and lightweight. Most of the models that are used for private purposes can be easily placed in the trunk of a car.

When choosing a reciprocating or other household compressor, you should pay attention to its performance characteristics:

• Receiver volume.
• Performance.
• Power.
• Pressure.
• Noise level.

As for the volume of the receiver, it is selected individually depending on the use of the device. If it is planned that the unit will be used exclusively for inflating wheels and rare simple painting works, then a capacity of 24 liters will be more than sufficient. If the compressor is used professionally for large-scale painting tasks, when maintaining a given pressure is important, then it is best to choose devices with a receiver of 50 liters or more. This rule applies to the connection of pneumatic construction or locksmith equipment. Otherwise, after a few seconds of operation, the air accumulated by the pump in the receiver will be released, which will allow you to continue working only after the pressure required for the instrument is restored.

Performance is also an important factor. If it is high, then even a unit with a small receiver will become quite suitable for professional tasks. For comfortable work, do not take equipment with a capacity below 150 l / min.

The more powerful the compressor, the better. It should be borne in mind that with an increase in this indicator, the noise level also increases. For a home device, a power of 1.5 kW is considered optimal. If the volume of the receiver is 50 liters or more, and if the equipment will be used to perform professional tasks, then it is better to give preference to a device with a capacity of 2-2.5 kW. Of course, it will not be overly productive, but in terms of price and efficiency, this option is optimal.

In terms of pressure, the vast majority of domestic compressors are rated at 8 bar. This is more than enough for almost any task. For example, to use a compressor for painting purposes, the outlet pressure is set to 4-6 bar, the same applies to pneumatic tools. Well, if you use the device exclusively for pumping wheels, then a compressor with the ability to build up pressure up to 3 bar would be sufficient for light vehicles. Also, when choosing, you should pay attention that the more powerful the device, the more voluminous, louder and heavier it is. When making a purchase, you should not chase performance, but start from the goals that will be in front of the equipment.

How to extend compressor life

In order for the equipment to work for as long as possible, it needs simple maintenance. First of all, it is not recommended to leave the receiver under pressure after completion of work. To do this, bleed the injected air, which will increase the life of the gaskets and valves.

From time to time, especially in cold weather, it is necessary to unscrew the special drain hole at the bottom of the receiver to drain the condensate that is released from the steam. This is especially important if the compressor is used to connect the spray gun. Otherwise, water droplets will fly out of it along with the air, which is completely unacceptable for painting work. The absence of moisture in the receiver provides reliable protection against corrosion. Rusty particles quickly clog the filter elements, reducing the efficiency of the equipment. If there is a significant appearance of condensation inside the receiver, a characteristic squelching sound is created when rocking.

Another important factor that negatively affects the preservation of the compressor's performance is overheating. The piston design is far from perfect, therefore, during the operation of the device, strong friction is created, which heats the working parts of the device. Significant overheating can become critical, therefore work should be alternated with interruptions. Membrane and screw structures are sensitive to frost, so it is better not to turn them on at sub-zero temperatures.

The article talks about what is a compressor, what and where they are used and what is their role in the industrial world as a whole.

So let's get started!

It is worth writing right away that a compressor is a device designed mainly for compressing and transmitting compressed gas under pressure, and for a better understanding of the function of compressors, I can say that the closest "brother" of a compressor is a pump. The date of the invention of the first compressor is considered the end of the 19th century. Some patriotic notes begin to play when you learn that the main theories of such machines were formulated by Russian scientists - Euler, Chaplygin, Zhukovsky.

During the century that they have existed, a large number of varieties of compressors have appeared, and several categories have already been used to classify them. For example, the classification by design features and by the principle of operation: reciprocating compressors, rotary, jet, axial, centrifugal. He also classifies compressors by the level of pressure generated: low (0.3 - 1 MN / m2), medium (1 - 10 MN / m2), high (over 10 MN / m2); by the nature of the compressed gas (air compressors, oxygen, nitrogen, etc.) and by some other parameters.

It makes little sense to describe the principle of operation of each type of compressor - this is a long time and, perhaps, will not be interesting to everyone - it is much more interesting to see where the compressors themselves can be used.
The first thing that comes to mind is the use of compressors in various industries. Indeed, such a function of compressors as the ability to supply air or other gas to the drive of pneumatic equipment is in great demand at any enterprise! But they are also used for other needs, for example, in refrigeration units (their peculiarity is that they work with vapors of refrigerants and are mainly screw compressors); for blowing in some metallurgical furnaces (for this, the so-called rotary compressor is used); in blast furnaces and steel mills; and even in aircraft jet engines (they use multistage axial compressors to increase the efficiency of the air compression process).

What can we say about their application in the oil sector of the industry, where compressors are responsible for the transportation of natural gas, its injection into tanks and storage facilities, oil distillation, and so on.

To assess the entire need for compressors in modern industry, in my opinion, it is enough to cite just one figure from statistics - modern enterprises engaged in mechanical engineering spend up to 30% (!!) of the consumed power to generate compressed air, i.e. About 30% of all energy consumed goes to compressors!

It is worth noting, in fairness, that in addition to industrial applications, they are also used in everyday life - as a rule, these are inexpensive and small compressors that would be nice to have in the garage and use for painting, blowing, tire inflation, and so on. Having it on the farm is very practical and quite inexpensive, and besides, good products practically do not require compressor repair.

Compressors are widely used in our daily life. Compressors are known to be involved in a variety of important manufacturing processes and are also part of industrial power systems.

In the industrial sector, compressors supply specially compressed air to general temperature control systems, purification systems or special air damper systems.

In the light industry, compresses are used in the process of innovative technology for applying complex images to tissue by aerosol spraying.

In construction, compressors are the main "heart" of any mechanism, because they, being a good conductor of energy, operate any tools and mechanisms important for work.

In servicing cars, compressors are widely used as a drive for all kinds of tools and mechanisms necessary for operation.

There is an air compressor, which is a device that compresses atmospheric air by reducing its nominal volume by a purely mechanical method. After compression, air is accumulated in a specially designed container. In some cases, after compression, the air enters directly into the working line. In this case, compression contributes to the fact that the molecules of atmospheric air begin to move at a tremendous speed in a smaller nominal volume. If there is a decrease in the pressure force due to external factors, then the air begins to move very quickly, tending outward. Such compressors are widely used in various areas of our life, especially in refrigeration units, units, tools.

The second type is a gas compressor. It is a dynamic device. Its principle of operation is similar to the principle of operation of an air compressor, with the only difference that there is gas under pressure. It is widely used in chemical, industrial and general-purpose industries.

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