Four common representation methods for air compressors

Four common representation methods for air compressors

In the 21st century, the air compressor market is highly competitive. When consumers choose products, they often include the quality and price of the machine in their purchase criteria. Therefore, the various labeling methods commonly used in the market will be explained, and we will do our best to protect consumers.

　　Four basic marking methods

1. Use motor horsepower to express

This was still feasible when the air compressor technology was not developed in the early days. However, with the continuous development of technology, even if the same motor is used now, the pressure level, the air compressor manufacturer and the size of the air compressor will be different. There is a huge difference in the amount of air discharged by an air compressor. Therefore, it is the most irresponsible practice to only indicate motor horsepower in the catalog.

2. Use Piston displacement to indicate

　　 Since this is the design data of the air compressor, it is only necessary to multiply the cylinder size by the number of revolutions. Therefore, this data is the easiest to obtain and is also used by many manufacturers to indicate. There is no certain relationship between the theoretical value and the actual air output, and it depends on the technical ability of the manufacturer.

　　3. Use Inlet volume to indicate

　　 This method of expression is usually measured by an Orifice meter on the side of the air inlet, and is currently only used to indicate the size of a centrifugal air compressor. The unit used is ICFM, which is more accurate than the previous two methods, but because the internal loss is not accounted for, it is still higher than the actual gas output.

　　4. Expressed as free air delivery

This method uses an aperture flow meter to measure on the outlet side. Because of its accuracy, it has become the world's main standard for measuring the actual air output of an air compressor, such as ISO, ASME, JIS, etc. However, in some Japanese manufacturers catalogs, Using FAD to mark, but adding Nominal capacity, it is usually understandable that this FAD is not real, but just a design value.

　　 It is a pity that it is one thing to have a standard, and it is another thing to have a standard. Therefore, unless the original catalog is written in black and white on the standard, its credibility will be greatly reduced.