2026-04-09Views：
If you determine the size and type of compressor, but there is a problem is the choice of oil lubrication or oil-free air compressor. Your choice on this issue should be based on the compressed air application process.
Do I need an oil-free compressor?
The first step in selecting a compressor is to evaluate the needs of the equipment. In some cases, the consequences of oil pollution is too high, in this case the use of oil-free air compressor is necessary. However, most manufacturing industries, industrial plants and small workshops are suitable for the use of oil-lubricated compressors, because the consequences of oil contamination in these applications will not be as serious as the consequences of oil contamination in the food and pharmaceutical industry production facilities. The role of the oil in the air compressor is to lubricate, seal and cool the compressed air. If there is no exact need to use oil-free compressed air, a more economical method is to use a micro-oil screw compressor. Oil-free compressors are much more expensive than oil-lubricated compressors. Although there are trace amounts of oil in the compressed air, the oil can be filtered by using appropriate air filtration post-treatment equipment.
Distinguish between grade 0 oil-free and technical oil-free
oil-free air compressors are used to produce a variety of oil-sensitive products, such as semiconductors, pharmaceuticals and paper. In the production process of these products, even a small amount of oil may have an adverse effect on the product and even people. Class 0 oil-free (Class0) and "technical oil-free" are usually used to indicate that the compressor meets the oil-free requirements of certain standards. Although these terms are similar, if their key differences are not considered, they may lead to unintended consequences.
Compressed air with cleanliness level 1 stipulates that the oil content is 0.01mg/m3 at 1bar(a) and 20 ℃. When compressed air meets this standard through filtration, it is called "technically oil-free". The standard was revised in 2001 and updated in 2010. The current standard specifies the limit value of oil content (aerosol, liquid oil and oil vapor) and specifies the specific measurement standard of oil vapor.
The new ISO standard adds a new level of cleanliness (class0) to meet more stringent quality requirements. Level 0 is the cleanest level. They can guarantee 100 percent oil-free air. There are some misconceptions in the industry that promote oil-lubricated compressors with filters, calling them "technically oil-free" and claiming that air quality is often better than oil-free compressors. These claims are untrue, and accidental damage to sensitive products and equipment can occur when Class 0 clean air is required but only Class 1 air is used.
When choosing an oil-free compressor, make sure to choose a 0-stage oil-free compressor instead of a "technical oil-free" product. Although the initial price of a 0-stage oil-free compressor is usually higher, this option is much safer in sensitive applications. If it is level 0 compressed air, you can ensure that your terminal equipment will never be contaminated and that your equipment assets are protected. When choosing an oil-free or oil-lubricated air compressor, the best practice is always to seek the advice of a compressed air professional.
Granklin uses 0.3-4.0 MPa compressed air in many industrial production and power stations such as medicine, electronics, chemical industry, microbial fermentation, blow molding, pressure detection, etc. At present, the screw air compressor is being upgraded and replaced at home and even internationally. The screw air compressor has high working efficiency, low noise, low vibration, convenient maintenance, low operating cost and good air quality. At the same time, the series of machines adopt microcomputer control system, the machine is equipped with pressure, temperature, overload and other multiple protection performance.
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