Oil-free air compressors are used more and more. What is an oil-free air compressor?
Oil-free air compressors are used more and more. What is an oil-free air compressor? Oil-free air compressor refers to a compressor that does not use lubricating oil in the compressor cylinder.
The difference between oil-free air compressor and oil-lubricated air compressor: The oil and oil-free air compressor generally refer to the oil content of the gas discharged from the air compressor exhaust port. Generally, oil engines have a large oil content, and oil content of oil-free oil engines is 0.01ppm, so this oil content is used to distinguish between oil and oil-free air compressors.
Today we mainly look at the advantages and disadvantages of oilless air compressors.
Advantages of oil-free screw air compressor:
1. Saving oil and using oily air compressors greatly wastes lubricating oil. Taking a 7.5KW high-quality oily air compressor as an example, it consumes less than 5 kilograms of lubricating oil per month, and will pay an extra 60 kilograms of lubricating oil over the course of a year. cost of using lubricating oil
2. Save trouble. Using an oil-free air compressor can be oil-free in one stop, directly reducing oil entering the back end from the root cause, which is relatively more convenient.
3. At present, water removal equipment such as freeze dryers, non-thermal renewal dryers, and micro-thermal renewal dryers lose its water removal function due to the compression of oil in the air; while the clean oil-free gas after compression by oil-free compressors fully protects the water removal equipment and reduces the additional capital occupation caused by maintaining the water removal equipment.
What are the shortcomings of oil-free screw air compressors
1. The exhaust temperature of the main engine is very high
Generally, the exhaust temperature of the main engine of oil-free screw machines can reach 180. Generally, factories will take some protective measures before leaving the factory, but special attention should be paid to high-temperature parts during operation to avoid burns or even fire danger.
2. Maintenance problems after the host is damaged
At present, except for a few manufacturers that provide oil-free mainframe repairs, other manufacturers require direct replacement of the mainframe, and the cost of replacing the mainframe is very high.
3. The problem of coating peeling off on the oilless screw
Nowadays, oil-free screw machines have two types of coatings, one is Teflon with average performance, and the other is molybdenum disulfide with much better performance. No matter which of the above, it has a service life and has high requirements for moisture. Therefore, when the oilless screw machine is not in use, it is necessary to rotate the machine frequently to avoid the machine being stuck when the main machine does not move for a long time. The frequent occurrence of host jams is caused by such reasons.
In fact, the current use of oil-free compressed air is becoming an increasingly trend in the pharmaceutical industry, but it is not only necessary to choose oil-free air compressors to achieve oil content below 0.01ppm. Nowadays, relatively mature and stable oil removal equipment is supported by oil-lubricated air compressors. It can also achieve oil removal to below level 0. This mature oil removal equipment does not require frequent replacement of filter elements and other consumables. It is also relatively convenient and the overall cost is much lower.
Each type of air compressor has its own advantages and shortcomings. When selecting, suitable choices should be made according to their respective needs. There are not too big regulations. We can only recognize the advantages and disadvantages of each type of air compressor. Just make a full understanding is conducive to the choice.
