Screw air compressor choose oil-free or oil-free

Good or bad depends on the occasion of use and the actual working conditions. In some cases, such as food, medicine, precision instruments and other industries, it is necessary to use a full oil-free air compressor. But the whole oil-free air compressor is much more expensive and the maintenance cost is higher.

If it is used for purging, machining, manufacturing and power use, it is possible to choose an air compressor with oil and micro oil. Such as spraying, steel, electricity, hardware, mining, ceramics, textiles, machinery, etc. are widely used.

The difference between oil and no oil

oil and no oil in the air compressor generally refers to the amount of oil content in the gas discharged from the exhaust port of the air compressor. Generally, the oil content of the oil machine is relatively large, and the oil content of the oil-free oil machine is 0.01ppm. Therefore, the oil content is used to distinguish the oil and no oil in the air compressor.

Now large displacement, all oil-free air compressor models have begun to use centrifugal air compressors.

One is to use water instead of oil, and the other is to coat the rotor with a self-lubricating coating (not oil lubrication, but resin lubrication). Because the bearings running at high speed at both ends of the rotor need oil lubrication, it is necessary to seal the lubrication space of the rotor bearing and the compression space of the rotor. It is precisely because of this high-speed seal that the oil-free air compressor needs high processing accuracy. The cost is also very high.

Oil-free air compressor once the failure of the host head, because too precise, the host head can only be repaired back to the manufacturer, greatly increasing the irreparability, even if it can be repaired, also need to pay a huge amount of money and a lot of maintenance time.

At present, the quality and stability of this kind of air compressor is not very satisfactory, and the domestic oil-free machine is generally lubricated. Therefore, it is not a super large enterprise, or has special requirements, must be completely oil-free, it is best not to blindly purchase oil-free air compressor. Looking for good brand, professional technical personnel, combined with their own industry and actual use, understand the advantages and disadvantages, in the choice of judgment.