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Single screw technology - How it works

Suction
Gas fills the rotor flutes before they mesh with the teeth on the bottom star wheel

Compression
As rotation continues, the gas is sealed within the space created by the rotor flute, the rotor housing and the star wheel tooth.  Continued rotation causes the volume of the rotor flute to reduce, compressing the gas

Discharge
As the maximum point of compression is reached, a discharge port is uncovered and all the gas is expelled from the rotor flute.  The action illustrated applies to the top bottom star wheel.  A mirrored action using the top star wheel occurs simultaneously on the underside of the bottom star wheel.

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