2026-04-10Views：
The difference between the oil injection screw air compressor and the dry screw air compressor is mainly reflected in the following aspects:
lubrication method:
the oil-injected screw air compressor will inject lubricating oil through a special system during the compression process and mix with the compressed gas to achieve the purpose of lubricating the screw and reducing wear. This method can extend the service life of the machine, but it may cause oil in the compressed air.
The dry screw air compressor does not use lubricating oil, and its screw surface adopts special material and surface treatment method, so no additional lubrication system is required. This makes the compressed air more dry and pure, and is suitable for occasions with high air quality requirements.
Cooling method:
the oil-injected screw air compressor is usually equipped with a cooling system to reduce the temperature of the compressed gas by forced circulation of water to ensure that the gas temperature is within the allowable range.
Dry screw air compressors also use a cooling system, but the focus is on air cooling or other cooling methods that do not require lubricating oil to discharge the heat generated during the compression process.
Application occasions:
oil-injected screw air compressor is suitable for occasions where the gas contains oil or the gas is compatible with the lubricating oil, such as air compression, refrigeration and gas compression in the process. Its exhaust pressure is generally in the range of 0.8MPa ~ 4.5MPa.
Dry screw air compressor is more suitable for the need for dry, pure compressed air occasions, such as food, medical and other industries. Due to its high exhaust temperature, the single-stage pressure ratio is generally small (1.5~3.5), so it is often used for low-pressure, large-flow air compression requirements.
Maintenance and use costs:
oil-injected screw air compressors require regular replacement of lubricating oil and may incur additional maintenance costs due to mixing of oil and gas.
Dry screw air compressors reduce oil-related maintenance costs because they do not require lubricating oil, but may increase other maintenance costs due to high speeds and high requirements for bearings and shaft seals.
In summary, there are significant differences between the oil-injected screw air compressor and the dry screw air compressor in terms of lubrication, cooling, application, and maintenance and use costs. The choice of which type of air compressor depends on the specific use needs and environmental conditions.
The pressure of the air compressor varies due to its design, use and operating environment. The following is the general pressure range of air compressors according to different application scenarios and types: Mini air compressor: The pressure range is usually between 1 and 5bar.
Pharmaceutical air compressor plays a vital role in the pharmaceutical industry. Its main functions and working principles are as follows: 1. The role of pharmaceutical air compressor: Provide compressed air: As an important pharmaceutical medium, air is used to promote and Mix pharmaceutical ingredients, clear
Air compressor fault prevention strategy and implementation guide As the core power equipment of industrial production, the stable operation of air compressor is directly related to the production efficiency and operating cost of enterprises. Failure prevention needs to start with full lifecycle management of equipment and build a system that covers daily dimensions.
Screw air compressor, per cubic meter of compressed gas inside, the oil content is about three to five milligrams. Although this value looks very small, if the gas consumption is very large and accumulates over time, a lot of oil will still be accumulated in the pipelines and gas-using equipment.
The oil content of air is usually classified according to the international standard ISO 8573-1, which clearly stipulates the maximum allowable content of oil in compressed air. The following is the classification of air oil content according to the ISO 8573-1 standard: CLASS 0 (or oil-free grade
When choosing a permanent magnet screw air compressor, you cannot rely solely on the brand, but also need to consider the actual needs and budget, so as to choose the appropriate model and specification. Shanghai Granklin Group's water-lubricated air compressors also have a certain share of the market, and its product package.
There is no universal figure for the air supply pressure in the factory. 6 to 10bar is the most common range, but it is ultimately determined according to the actual running equipment in the workshop, the length of the pipeline and the fluctuation rhythm of the air consumption. If the pressure is set correctly, the equipment will run steadily and the energy consumption will not be wasted on the excess pressure drop.
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Screw air compressor and screw air compressor have their own advantages and applicable scenarios, so it is difficult to generalize which is better. When choosing, we need to consider multiple aspects such as specific usage needs, budget, maintenance costs, and energy efficiency requirements.
The specific value of the pipe network pressure of the factory air compressor is not fixed, it will be affected by many factors, including the design pressure of the air compressor, the design of the pipe network, the demand of the gas equipment and the operation status of the system. The following is the pressure on the factory air compressor pipe network
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