What is the difference between screw air compressor and oil-free air compressor

There are some differences in the design and working principle between screw air compressor and oil-free air compressor, which are mainly reflected in the lubrication mode, compressed air quality and application field. The following will be combined with the characteristics of Shanghai Granklin Group water lubrication oil-free frequency conversion screw air compressor for a detailed description:

lubrication method:

screw air compressors usually use oil lubrication, that is, lubricating oil is used during the compression process to reduce friction and cool the compressor. This type of lubrication may result in traces of oil in the compressed air.

Oil-free air compressors, such as the water-lubricated oil-free frequency conversion screw air compressors of Shanghai Grankering Group, use water as a lubricant, completely avoiding the use of oil. The water lubrication system reduces friction and cools the compressor by injecting an appropriate amount of water into the compression chamber to form a water film, thereby ensuring that the compressed air is pure and oil-free.

Compressed air quality:

since the screw air compressor uses oil lubrication, the compressed air may contain trace amounts of oil, which is acceptable for some applications that do not require high purity of compressed air.

The compressed air produced by the oil-free air compressor is completely free of oil, which is very suitable for applications that require extremely high purity of compressed air, such as food, pharmaceutical, semiconductor and other industries.

Application areas:

because of its high efficiency and stability, screw air compressor is widely used in various industrial fields, such as machinery manufacturing, chemical industry, textile and so on.

Oil-free air compressors are more suitable for industries with special requirements for the purity of compressed air. Take the water-lubricated oil-free variable frequency screw air compressor of Shanghai Glaklin Group as an example, its power range is between 7.5-250KW, which can meet different scales and needs of semiconductor manufacturing, food processing and other applications.

Question: What are the advantages of the water-lubricated oil-free variable frequency screw air compressor of Shanghai Granklin Group in terms of energy saving?

Answer: The water-lubricated oil-free frequency conversion screw air compressor of Shanghai Granklin Group adopts advanced frequency conversion technology, which can adjust the output of the compressor in real time according to actual needs. This intelligent adjustment function allows the air compressor to maintain high efficiency even when running at part load, thereby greatly reducing energy consumption. In addition, the water lubrication system also helps reduce the energy required for friction and cooling, further improving the overall energy efficiency of the air compressor. Therefore, this kind of air compressor has a significant advantage in energy saving, which helps to reduce the operating cost of users.