First of all, we should know what is silent oil-free air compressor and understand its working principle. At present, the main engine of silent oil-free air compressor adopts micro reciprocating piston compressor. If it is not this type, it can be definitely judged that this kind of air compressor does not belong to silent oil-free air compressor, and the air quality can not meet the requirements of silent oil-free air compressor. Working principle: the crankshaft of the piston compressor rotates once, the piston reciprocates once, and the process of intake, compression and exhaust is realized successively in the cylinder, that is, a working cycle is completed. The structural design of single shaft and double cylinder makes the gas flow of the compressor twice that of a single cylinder at a certain rated speed, and has been well controlled in vibration and noise control. Secondly, what are the parameter requirements of the silent oil-free air compressor and whether the identification is correct and complete. Whether the technical parameter identification is complete and correct. Parameters identified according to international practice include metric units and American units.

There are corresponding standards for the purchase of air compressors according to different industries. Oil-free air compressors are generally used in industries with higher air quality requirements, including laboratories and medical industries. For laboratories, the oil and gas in oil-free air compressors will affect valves, nozzles, pollute air or tamper with measurement data and affect test results, Therefore, the laboratory will generally use oil-free air compressor for analysis, test or quality control. For the medical air compressor, stability is the most important factor. At the same time, the medical compressed air must be clean and hygienic. Therefore, it is best to select the oil-free air compressor, such as the mechanical ventilation required by the ventilator in the ICU ward, the instrument gas required by the dental equipment in the operating room, and the unqualified equipment will threaten the life safety of patients, the service life of high-quality medical equipment and the function of precision instruments, These air compressors belong to the category of medical devices, and also have corresponding standards and certification, which should be paid attention to when purchasing