We are interested in cooperation with the manufacturers of positive displacement compressors who are looking for an official and reliable distributor that deals with supply & delivery of 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 positive displacement compressors. 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 in Russia, our marketing staff will carry out a market research in order to check the demand for positive displacement compressors, will submit a market overview for positive displacement compressors 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 positive displacement compressors 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, for various types of positive displacement compressors 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 positive displacement compressors 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 positive displacement compressors 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 positive displacement compressors. They will also provide necessary training and guidance for the customer’s personnel.
The compressor is a machine that increases the gas pressure and then supplies it for use in various applications including those associated with combustion, pneumatics, cooling and gas transportation processes. The main purpose of a compressor is to increase the gas pressure to such a value that it will be possible to use it in the relevant process.
The positive displacement compressor compresses the medium in the working chambers, the volume of which increases and decreases under compression causing the pressure change. The pressure changes due to periodic changes in volume of the chambers during the operation of the compressor. When the volume decreases, the pressure increases. Positive displacement compressors operate with constant performance and, depending on the structural shapes of the working parts and on how the volume of the working chambers changes, they can be of rotary or reciprocating type.
The oil injected under pressure forms an oil film during the compressor operation and serves as a lubricant, and participates in the process of cooling. However, when the compressor starts and stops, the oil fails to distribute, and the vanes and the stator can come into contact, which eventually leads to wear. Any solid particles can also cause the vanes to wear.
The assembled operating unit can be replaced in compressors with high performance and a pressure exceeding 5bar. The stators are not recoverable (their grinding is not possible). The vanes only cannot be replaced without the stator. The air quality and the operation mode determine the service life of the compressor. In case of irregular operation, the service life of the operating unit equals approximately to 25,000 hours. However, the longer the unit is in operation, the longer its service life due to the uniform distribution of the lubricant in the working parts.
General description and types
Positive displacement compressors include compressors of the following types:
In positive displacement compressors, the pressure is increased by holding a certain amount of gas, and converting it into a smaller volume. The most common types of positive displacement compressors are reciprocating and screw compressors.
Main gas pipelines, petrochemical plants, refineries and other industries and areas of application depend on this type of equipment. Due to many factors including, but not limited to, the quality of the original designs, adequacy of maintenance and operating performance, industrial enterprises can face significantly various expenses for the service life extension and reliability of their own units.
Different compressors can be found in almost every industrial application. Positive displacement compressors can pump the following gases:
|Inert gases||Hydrocarbons||Reactive gases|
|carbon monoxide||butane||nitrous oxide, etc.|
|air||natural gas, etc.|
Reciprocating compressors are typically used where there is need for a high degree of compression per stage (degree of the discharge relative to the suction pressure) without high performance, and the process medium is relatively dry.
Rotary compressors have a simple design and lightweight; they differ in shape of the rotor and are used in many industries.
The principle of operation of positive displacement compressors, layout
Positive displacement compressors have a similar principle of operation and a similar loss mechanism. However, the relative value of various losses may vary from type to type. For example, the loss due to leakage can be small in the oil-filled industrial compressor with reliable piston rings, but may be significant in the dry screw compressor, if it operates at low speed and the pressure increases.
All types of compressors have a compression chamber, where the gas is disposed at a discharge pressure at the end of the discharge process. For some design types, this volume may be small, for others it may be substantial. Some types of compressors, such as reciprocating compressors, may have a large compression space, however, the gas returns to the suction pressure in the cylinder. In the screw compressor, the gas expands to the suction pressure in the compression space.
Some types of compressors that use fixed discharge outlets are designed to operate with a specific volume value.
Let us consider the principle of operation and the design of positive displacement compressors in more detail by the example of the reciprocating compressor and the screw compressor.
Rotary type compressors are compact and require little maintenance during their operation. Rotary compressors have a high-pressure housing. The suction in these compressors takes place directly in the compression chamber. The gas compressed in the chamber is discharged into the compressor housing. It should be noted that in case of a cold start, compressors with a high-pressure casing require more time to reach their normal operating pressure in the compressor housing. This is partly due to a large volume of the compressor casing.
Rotary screw compressors are positive displacement compressors that use screw-shaped rotors to compress gases. The main components are the inlet and outlet, and the main and auxiliary rotor. When the screw rotor slots go past the gas inlet, the gas enters the slots. The gas is held there, forming a gas pocket across the slot length. Once the main and auxiliary rotors engage, the gas pocket volume decreases and the gas held therein compresses. When the slot reaches the discharge, the gas is released.
The main two types of screw compressors are oil-flooded compressors and dry-type compressors. The most common are oil-flooded compressors, where oil and gas enter the compressor together. The oil performs a sealing function for the rotating rotors, while dry-type compressors have a timing gear, which regulates the movement of the rotors. However, the oil must be removed from the compressed medium before it leaves the compressor. Oil filters are used for this purpose. This part of the compressor requires regular maintenance and replacement.
Reciprocating compressors are positive displacement compressors that use the motion of the piston inside the cylinder to move the gas from one level of pressure to another higher level of pressure. The compressor cylinders, also called stages, which the compressor may have in the amount from one to six and more, represent limiting regulators for the process gas during compression. More stages are used to achieve a higher gas pressure. These compressors can be of single or double action. In double-action compressors, the gas compresses on both sides of the piston. Some double-action cylinders in high-pressure applications have the piston rod on both sides of the piston to ensure uniform and balanced loads. Designs with tandem cylinders help to minimize dynamic loads through the arrangement of cylinders in pairs connected to the common crankshaft, so that the motions of the pistons are opposite to each other. The wear of expensive parts is minimal. Compressors with a single cylinder are classified as either vertical or horizontal.
Application of positive displacement compressors
Positive displacement compressors are widely used for industrial processes that require the compression of air, process gases and refrigerants. You may find positive displacement compressors in the chemical industry, agriculture, electronics, metallurgy, food industry, pharmaceutical industry, pneumatic conveyor systems, etc.
Positive displacement compressors are used both in the production of gas and vapor recovery, when actuating media require transportation. Compressors of this type are used for applications where the conditions for the process gases and the gas composition can vary. In this case, oil-free screw compressors are most commonly used. Screw compressors are also a good choice, if you need cost-effective operation. They can easily treat gases containing impurities, liquefied gas, and fuel gas.
Large multi-cylinder multi-stage reciprocating compressors - one more type of positive displacement compressors - are used to produce low-pressure air, move natural gas, supply high-pressure gas during drilling, as well as for various applications in the production or chemical processes that require medium-pressure or high-pressure air. These compressors can be used at the fields and have a remote control, or at the inlet of gas plants compressing wet, moist (with water or hydrocarbon content) and, possibly, acid (with hydrogen sulphide content) natural gas. These compressors are also installed at the discharge end of gas plants compressing completely clean and dry gas for consumers and supplying it to the main pipe.
Advantages and disadvantages
Main advantages and disadvantages of positive displacement compressors are shown in the table below.
|Positive displacement compressors||Disadvantages||Advantages|
Reciprocating compressors are typically inexpensive, but their performance decreases with time, the noise level is high and the quality of the medium can be low due to the oil contained in the compressor.
Positive displacement compressors represent a class of high-performance industrial machines used in many industries. Now, the manufacturers are constantly working to improve the design and compressing features of these compressors.
Compressors and blowers
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!