We are interested in cooperation with the manufacturers of air and gas blowers, who are looking for an official and reliable distributor to supply their equipment to the industrial plants in Russia.
The company’s top management and sales team are well acquainted with the Russian market, its mentality and laws; they also understand industrial specifics of the financial and economic activities of the Russian customers. All our sales managers have a large customer database, extensive experience of successful sales and well-established connections with the potential buyers of your air and gas blowers. This allows our managers to promptly set out the most promising directions for promotion and to ensure a rapid entry of the products into the promising Russian market. Our employees, who are fluent in English and German, are focused on working at the international market with the supplies of foreign equipment.
Our team of experienced engineers, who can handle the most serious technical problems, constantly keeps in touch with the Russian customers, holds meetings and delivers presentations regarding the latest achievements of our manufacturing partners. They point out the engineering challenges and actively communicate with all the departments at Russian plants. That is why the specifics of doing a business in the Russian Federation are well-known to us, and we also know the equipment of the local industrial plants and their up-to-date modernization needs.
Once we become your authorized representative for air and gas blowers in Russia, our marketing staff will carry out a market research in order to check the demand for air and gas blowers, will submit a market overview for air blowers that you offer and evaluate the needs for this type of equipment at local plants. Our specialists will also estimate the potential and capacity of this market at local industrial plants. Our IT-team will start developing a website for your products in Russian. Our experts will assess the conformity between your gas blowers and customer needs as well as analyze the common reaction to the new goods in general. We will look into the categories of potential customers, and pick out the largest and the most promising plants.
Upon becoming your authorized agent on the territory of Russia, ‘Intech GmbH’ LLC (ООО «Интех ГмбХ»), will obtain certificates, if required, for a batch of the goods or for various types of air and gas blowers in compliance with Russian standards. We can also arrange the inspection in order to obtain TR TS 010 and TR TS 012 Certificates. These certificates provides permission to operate your equipment at all industrial plants of the EAEU countries (Russia, Kazakhstan, Belarus, Armenia, Kyrgyzstan), including the hazardous industrial facilities. Our company is eager to assist in issuing Technical Passports for air and gas blowers as per Russian and other EAEU countries’ requirements.
Our engineering company ‘Intech GmbH’ LLC (ООО «Интех ГмбХ»), collaborates with several Russian design institutes in various industrial segments, which allows us to conduct preliminary design as well as subsequent design works according to the standards, construction rules and regulations that are applicable in Russia and other CIS countries. It also enables us to include your air and gas blowers into the future projects.
The Company has its own logistics department that can provide packing service, handling as well as the most efficient and cost effective mode of transportation of the goods (incl. over dimensional and overweight goods). The goods can be delivered on DAP or DDP-customer’s warehouse basis in full compliance with all the relevant regulations and requirements that are applicable on the Russian market.
Our company has its own certified specialists who will carry out installation supervision and commissioning of the delivered equipment, as well as further guarantee and post-guarantee maintenance of gas blowers. They will also provide necessary training and guidance for the customer’s personnel.
Gas blowers and air blowers belong to the category of discharge machines. This category is between the category of fans and the category of compressors in terms of discharge pressure that can be generated. The boundaries between the compressor equipment and blowers are not precisely defined, so the equipment operating at excessive discharge pressure (0.5atm to 2atm) can belong to both air blowers and compressors.
Air blowers can otherwise be characterized as low-pressure compressors serving to supply air or generate vacuum. Their main purpose is connected with the aeration of pools, ponds, water treatment plants, as well as the transportation of powder material. The type of a compressor that may have different airflow capacity or operating principle defines the application of the air blower.
We know a great number of their types: rotary, cam, turbo-blowers, used in large industrial plants and facilities, etc. They are widely used to ensure the operation of pneumatic tools. Factories and plants directly connected to the metal remelting are sure to have the above-mentioned equipment. One more application field for air blowers: ventilation, air extraction and air conditioning systems. Rotary vane air blowers are used to ensure proper air conditioning quality in any construction area. Rotary air blower operates, so its vapors do not pollute the discharge air. This type is also recommended for air conditioning in medical or food industry sectors. They are widely used in boiler rooms, in the aeration processes of wastewater treatment plants, in the supply of air to furnaces, and for cleaning the filtering equipment.
Classification of air blowers (gas blowers)
The most common is the classification based on their operation, as well as their design. There are 3 main groups:
Rotary type air blowers belong to displacement machines, but, unlike piston type air blowers, they form the working chamber through cutting off a part of the space by the gas blower housing and its moving parts: rotors or vanes disposed on the rotor.
Blade axial air blowers are used to supply the working medium at a greater rate, but at a low pressure. As the name implies, the direction of movement of the medium coincides with the axis of the gas blower. They work as follows: blades fixed to the hub at an angle form the impeller, which transfers energy to the working medium while rotating and moves the medium along the axis of the air blower.
The operation of piston-type air blowers is based on the processes of the medium suction and displacement from the working chamber by means of the piston. The operation principle of the piston air blower is based on the reciprocating motion of the piston and the use of one-way valves, ensuring that the suction and discharge processes are carried out. Periodic movements of the piston cause uneven supply, and arising inertial forces limit the piston speed of the air blower.
Vane gas blowers
These gas blowers belong to the rotary type. The rotor is disposed within the cylindrical part of the housing and displaced relative to its axis, i.e. located eccentrically. It is also equipped with vanes, hence the name, that have no hard fastenings and able to move in special grooves arranged in the rotor. When rotating, the vanes press against the housing by centrifugal force, whereby they cut off the limited volume of gas, which moves from the suction nozzle to the discharge nozzle. The pressing of the vanes against the housing may also be carried out using springs built into the rotor. Due to the displacement of the rotor axes of the housing cylindrical part, the gas volume cut off by the vanes decreases while approaching the outlet of the gas blower, thereby providing an increase in pressure.
The main element subject to wear in this type of gas blowers is vanes that can be easily replaced in case of failure. Vane gas blowers also do not pollute the pumped medium with lubricants due to its absence, and a large number of vanes smooth the pulsation of the produced flow, which reduces the influence of one of the main disadvantages of the displacement gas blowers.
Double-rotor gas blowers
If there is a need to generate high pressure, one can use double-rotor gas blowers. Advantages of double-rotor blowers include their functionality, low noise level, longer life, low vibration and relatively simple design. The only disadvantage of this type of gas blowers is low power capacity. This being the case, the proper choice of the equipment should be based not only on its operating characteristics, but also on the degree of power consumption, particularly if you plan to use compressors of the air blowers constantly and in continuous mode.
The working cavity of the (double-rotor) gas blower is equipped with, as the name implies, two rotors of synchronous rotation. During their operation, the gas is taken from the suction nozzle and transferred to the discharge nozzle. The rotors act as rotary pistons. When the gas volume meets the discharge nozzle, the pressure increases sharply (almost adiabatically). Synchronization during rotation of the rotary mechanisms is achieved by a toothed (gear) transmission, so you can often find this type of gas blowers under the definition of "gear compressors". The gear transmission allows both rotors to operate synchronously and contactlessly. During such operation the blades of the rotary mechanisms do not come into contact with each other, as well as with the device housing, which makes it possible to refuse from their lubrication. Only gears and bearing assemblies disposed in a separate lubricating compartment need to be lubricated, which prevents lubricants or metal shavings (chips) from getting into the discharge airflow.
For this design to be effective, the rotors need to be designed with blades, and the housing of the device shall have minimal tolerances: the closer the parts with less tolerance are adjoined, the smaller the gap, and hence, the air blower will work more efficiently. Compliance with such precision during the manufacture of the air blower mechanism entails the emergence of such factors as the excessive sensitivity to the excess of the operating temperature. Therefore, it is strictly unacceptable to use rotary air blowers at temperatures above nominal or at excessive shaft speed. At high temperature, rotor blades are subject to thermal expansion, which can cause jamming of the mechanism. Housings of double-rotor gas blowers made with outside finning have good heat dissipation effect and, accordingly, increase the reliability of the air blower as a whole. Double-rotor air blowers can provide a wide range of capacity control (when using a frequency converter) and operate steadily in any pressure mode not exceeding the maximum allowable value. Gear compressors can differ in layout, manufacture materials, availability of check valves and their type, transmission type (belt or coupling), type of sealing joints between the working chamber and the gear unit, and in the explosion protection category.
A negative factor in the operation, and, consequently, in the design of rotary air blowers is the pulsation of the air flow, creating the vibration effects that have a wearing impact on the mechanism parts. Vibrations also increase the noise level of the air blower in operation. To reduce the impact of vibration, it is necessary to install damping beds on the air blower and use the soundproof housing. To prevent the impact of vibration, compensating elements (compensators) can be used for distribution pipelines.
Double-rotor gas blowers manufactured today are divided into two groups:
The first type is easier to manufacture and therefore less expensive, but its performance characteristics are inferior to those in the second type of machines. Three-bladed air blowers have a number of advantages including their greater efficiency and reliability during operation. The blades in the three-bladed mechanism are placed at an angle of 120° (in the two-bladed mechanism, at an angle of 180°). Consequently, a lateral displacement force arising during the gas compression is reduced, which reduces the risk of contact of the blades with each other and with the housing, which may cause jamming of the mechanism. This makes three-bladed air blowers less susceptible to wear. Another important difference between two-bladed and three-bladed air blowers is that the first one performs 4 compression operations per complete revolution, and the second one provides 6 compressions per revolution, but with a smaller volume of compression. Since the three-bladed air blower has a smaller volume of the compressed air, with a lower amplitude of pulsations, it generates them more frequently, which smoothes the flow of the supplied gas.
Gas blowers of this type are successfully used in the petrochemical industry. For example, they are applied for the transportation of hydrogen chloride in the production of foamed styrene. In this case, gas blowers operate with active gas, so their components are made of stainless steel to resist the corrosive influence of the gas. Rotary gas blowers are also used in nuclear power plants to pump the air through gas-cleaning machines, in the steel production, in the process of pumping the methane from coalmines, etc. Gases that are conveyed by gas blowers should not contain mechanical impurities and liquid suspensions, and should be non-aggressive towards construction materials of the gas blower, and non-explosive in pumping conditions.
Turbo-blowers are used at high flow rates of compressed air and discharge heads of not more than 10 m, for example, at aeration stations and similar facilities. Where the head is greater than 10 m, the multistage type turbo-blowers are used, capable of providing a head of up to 30 m. The operation principle of turbo-blowers is the same as that of centrifugal pumps. The air is compressed and pumped into them by the centrifugal force generated by the rotational movement of the impeller, from where the air enters the stationary diffuser of annular shape. The diffuser, which together with the blades forms the guide vanes, serves to convert the airflow kinetic energy into the potential energy (head). At suction, they are capable of generating negative pressure within the range of 10-50 kPa, and in some cases up to 90 kPa, i.e. they are able to fulfill the role of vacuum pumps (with a low vacuum level).
Turbo-blowers are divided into single-stage and multi-stage devices. Single-stage turbo-blowers are capable of operating at a head of 3-6 m, and multi-stage turbo-blowers create a head up to 30 meters and are equipped with no more than 4 stages, whereby the suction can be one-sided and double-sided. Such turbo-blowers usually have a molded case made of cast iron with axial connector consisting of sections separated by partitions (diaphragms). The rotating rotor disposed inside the housing consists of a shaft and impellers forced on the shaft. The rotor shaft has a stepped shape with a thickening coming from ends to the middle, and leans on two or three ball-bearing supports typically fabricated from carbon steel. Another possibility to increase the pressure in the turbo-blower, allowing reducing the size of the device, is to increase the speed of the rotor, which can be achieved by the use of the overdrive.
Impellers of turbo-blowers are usually of closed shape, with recurved blades. This design is characterized by high (hydraulic) efficiency and provides a wide field of stability during operation. Blades are made of nickel steel; disks are made of chrome-molybdenum steel or high quality steel of carbon-containing grades.
They are used for aeration (e.g., to saturate water with air) in the systems transporting granular substances in the food industry, to create hot air curtains, as chargers for cleaning systems, in the processes of packaging drying and removing of moisture from surfaces before coating, and in drying devices at car washes.
Vortex gas blowers
Gas blowers with side channels (vortex gas blowers) belong to dynamic air blowers. While in centrifugal type gas blowers, gas is pushed back once by the blades of the impeller from the center in the radial direction, gas in vortex gas air blowers returns to the axis along the inner wall of the side channel, and then enters again the operating area of the same impeller. Since the impeller repeatedly affects the gas, the kinetic energy transferred to it increases, contributing to an increase in pressure. Vortex air blowers operate almost silently, have a compact shape, a sufficient degree of reliability, and are easy to handle. They are, however, inferior to their competitors of double-rotor and centrifugal types in terms of efficiency, so it is better to apply them in cases where the total cost of electricity is insignificant.
Vortex air blowers are applied diversely: from aeration processes in wastewater treatment plants, supply of burners with air, drying of glassware, to food processing operations. In general, their applicability is extremely high and covers areas such as:
Reciprocating gas blowers
The medium discharge in this type of gas blowers is carried out by means of the piston displacing a certain amount of gas from the working chamber. Reciprocating motion of the piston is usually created with the help of a crank mechanism, and the primary source of the motion is a drive shaft connected to the motor shaft. The direction of the discharged medium is controlled by means of check valves. The operation of such gas blowers includes separate cycles consisting of several phases. During the suction phase, the piston performs a reverse stroke, which creates negative pressure in the working chamber, and a portion of gas is drawn from the suction nozzle through the valve, whereby the discharge channel valve is closed. During the discharge phase, where the piston performs a forward stroke, a reverse situation occurs, in which the suction nozzle valve is closed, and the gas volume is displaced from the working chamber through the opened discharge nozzle valve.
Drives of air blowers
As in the vast majority of the equipment used, the operation of air blowers is ensured by the operation of an electric or other motor that converts the energy of the fuel in the energy of the rotational motion, and transfers it to the air blower drive shaft. The transfer of the rotational motion can be performed using various types of drives, and therefore there are following types of air blowers:
In coupling air blowers, the rotational torque is transferred from the electric motor to the compressor assembly by means of an elastic coupling. Their suction and supply lines can be arranged horizontally or vertically.
Belt air blowers are devices, in which the rotational torque from the electric motor to the compressor assembly is transferred through the V-belt transmission. All components of the belt air blower are disposed on the common metal frame for easy transport and connection of the air blower to the pipelines.
Compressors and blowers
Центробежные воздуходувки и газодувки
Luft- und Gasgebläse
Upon becoming the official distributer of air and gas blowers, our company ‘Intech GmbH’ LLC (ООО «Интех ГмбХ»), carries out the following: finds the buyers of your products on the market, conducts technical and commercial negotiations with the customers regarding the supplies of your equipment, concludes contracts. Should a bidding take place, we will collect and prepare all the documents required for the participation, conclude all the necessary contracts for the supply of your equipment, as well as register the goods (air and gas blowers) and conduct customs clearance procedures. We will also register a certificate of transaction (Passport of Deal) required for all foreign trade contracts in the foreign currency control department of the authorized Russian bank so that currency transaction could be effected. If required, our company will implement an equipment spacing project in order to integrate your equipment into the existing or newly built production plant.
We are convinced that our company ‘Intech GmbH’ LLC (ООО «Интех ГмбХ»), will become your reliable, qualified and efficient partner & distributor in Russia.
We are always open for cooperation, let’s move forward together!