Compressor selection

1. Use pressure 2. Air consumption in Nm3/hr 3. What is the purpose? If it is for instrument air, attention must be paid to moisture, oil content, and dust levels; in such cases I recommend an oil-free twin-screw compressor. For general purposes, an oil-minimized compressor is suitable. 4. Is a cooling water system or an air-cooling system required?

Air compressors are mainly classified as follows: based on the gas delivery volume (which refers to the volume of gas discharged per minute by the compressor in its operating state, converted to the volume at intake conditions), there are small-scale compressors (with a gas delivery volume of less than 10 cubic meters per minute), medium-sized compressors (with a gas delivery volume of 10–100 cubic meters per minute), and large-scale compressors (with a gas delivery volume of over 100 cubic meters per minute). Classified by structure, there are rotary, piston, and diaphragm air compressors. The common types include piston-type, as well as screw-type and vane-type among rotary types. Screw compressor rotors have complex profiles, resulting in higher manufacturing costs, but they are small in size, light in weight, and consist of few components. With the same displacement, screw compressors are much more expensive than piston compressors, and maintenance personnel must also possess specialized knowledge and experience. The basic criteria for selecting a air compressor are cost-effectiveness, reliability, and safety. First, the level of exhaust pressure and the volume of exhaust gas should be taken into consideration. Second, the gas usage scenarios and conditions need to be considered. Third, it is necessary to consider compressing the air quality. Compressed air produced by ordinary air compressors generally contains a certain amount of lubricating oil as well as water. In some applications, the presence of oil and water is not allowed; in such cases, it is necessary to pay attention to the selection of the compressor, and additional devices may need to be installed if required. Fourth, the safety of compressor operation must be considered. This post was last edited by qihangla on 2009-3-4 21:18]

A post on the same topic already appeared a month ago, and the discussion results were already available – why is it showing up again? The moderators aren’t managing things properly.

Senior on the 4th floor, please don’t say that; we’re all here to learn and communicate

It has indeed been discussed; what aspects should be taken into consideration when selecting an air compressor? Could experts provide some guidance? http://bbs.hcbbs.com/viewthread.php?tid=360265&highlight=%D1%B9%CB%F5%BB%FA%D1%A1%D0%CD Compressor selection and procurement http://bbs.hcbbs.com/viewthread.php?tid=367538&highlight=%D1%B9%CB%F5%BB%FA%D1%A1%D0%CD