Regarding purified air and unpurified air
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Dear everyone, is both purified air and unpurified air used as air for instruments? Is purified air simply unpurified air that has been filtered? And where is each type of air generally used? Please let me know
Instruments are generally powered by purified air, such as in the case of pneumatic control valves; this air is dried, whereas unpurified air contains moisture and is usually used for purging purposes!
Is it correct to understand that the air coming out of the compressor is unfiltered air, while the air that has passed through drying and filtering processes is filtered air?
Under normal circumstances, the cleaning air is supplied by an oil-free lubricated compressor and undergoes corresponding filtration, oil removal, and dehydration treatments； Rather than purified air, oil-lubricated compressors are mostly used for process purposes ；
Purified air refers to instrument air, while unpurified air refers to utility air. Instrument air is used for instruments and has been treated to remove dust, moisture, and oil. Utility air is the instrument air before it is processed; it has not undergone such treatments as dust, moisture, or oil removal. The difference between the two lies in whether they have been processed, with utility air generally being used for tasks such as purging and displacement
Purified air is dry air that has been processed; it is used as the power air in instruments. However, if cost is not a concern, purified air should be used in all cases