Let me explain how a rotary screw element is built up. See this example picture of an oil-free screw element. Compressor element (oil-free type). Photo: Atlas Copco Of course, we see the two rotors (male rot.
[pdf] The three important structural parameters of the screw air compressor are: addendum speed and speed, rotor diameter and length-to-diameter ratio, and internal volume ratio, which will be explained in detail below.
[pdf] They use oil-free technology to produce pollution-free compressed air and are suitable for industries such as food and pharmaceuticals. They are designed to be energy-efficient and have the characteristics of low operating noise, low maintenance costs, long life, and stable and reliable.
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