2026-04-09Views：
The distinction between oil-free air compressor and oil-free air compressor can be carried out mainly from the following aspects:
lubrication method:
oil air compressor: Use lubricating oil to lubricate its moving parts, such as pistons, bearings and gears. Lubricating oil also helps to seal and cool the gas during compression.
Oil-free air compressor: do not use lubricating oil for lubrication. For example, the water-lubricated oil-free frequency conversion screw air compressor of Shanghai Granklin Group uses water as the lubricating medium to achieve true oil-free compression.
Compressed air quality:
compressed air may contain trace amounts of lubricating oil, and post-processing equipment (such as oil separators, dryers, etc.) is required to remove oil and moisture to ensure air quality.
Oil-free air compressors: The compressed air provided does not contain oil, so it is particularly suitable for applications with high air quality requirements, such as the food, pharmaceutical and medical industries.
Maintenance and operation:
oil air compressor: need to change the lubricating oil regularly, check the oil level and oil quality, and clean or replace the oil filter.
Oil-free air compressor: no need to deal with lubricating oil related problems, but need to regularly check the water system (for water lubrication type) and other key components.
Structure and materials:
oil compressor: may be more suitable for oil lubrication materials and design.
Oil-free air compressors: use materials and designs that are compatible with water or other non-oil lubricating media.
Cost and Investment:
oil compressor: usually the initial purchase cost is low, but considering the long-term oil consumption and replacement costs, the overall operating cost may be higher.
Oil-free air compressors: Due to the use of more advanced technologies and materials, the initial purchase cost may be higher, but in the long term, due to low maintenance costs and no need to deal with oil pollution, the overall operating cost may be lower.
Regarding the water-lubricated oil-free frequency conversion screw air compressor of Shanghai Granklin Group, it adopts oil-free compression technology and uses water as the lubricating medium, thereby avoiding the problem of oil pollution. This kind of air compressor is especially suitable for the high quality requirements of compressed air, such as medical, food and pharmaceutical industries. Its power range is between 7.5-250KW, which can be adjusted according to actual needs to achieve energy efficiency optimization.
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