Can the micro-oil screw air compressor filter out oil-free gas?
Micro-oil screw air compressors usually cannot filter out completely oil-free gas. The following is a detailed explanation of the problem:
Micro oil screw air compressor working principle
the working principle of the micro-oil screw air compressor is that two parallel yin and yang rotors mesh with each other in the cylinder to form a working volume. With the rotation of the rotor, the size of the working volume changes periodically, so as to realize the suction, compression and discharge of gas. In this process, in order to reduce friction and wear and improve the service life of the equipment, the micro-oil screw air compressor usually uses a small amount of lubricating oil.
Lubricant Involvement
during the compression process of the micro-oil screw air compressor, the lubricating oil will participate to form a lubricating oil film and cover the surface of the screw. This not only reduces friction and wear, but also helps with cooling and sealing. However, this also means that the compressed gas will contain a certain amount of oil.
Gas Treatment and Filtration
although micro-oil screw air compressors produce oil-bearing gas during compression, modern equipment is usually equipped with an oil-gas separator. The main function of the oil-gas separator is to separate the oil in the compressed gas to reduce the oil content of the gas. However, the separation efficiency of the oil-gas separator is not 100%, so the separated gas still contains a small amount of oil.
Oil-free air demand
in some occasions with high air quality requirements, such as food, medical, electronics and other industries, it is necessary to use completely oil-free compressed air. For these applications, oil-free screw air compressors are the better choice. The oil-free screw air compressor is designed to avoid the participation of lubricating oil, so as to provide pure oil-free compressed air.
Conclusion
in summary, the micro-oil screw air compressor usually cannot filter out completely oil-free gas due to the participation of lubricating oil. Although equipped with a gas separator, but the separated gas will still contain a small amount of oil. Therefore, in the case of completely oil-free air, oil-free screw air compressor should be selected.
