The working principle of a Roots blower is based on the rotation of the Roots rotors and the variation in the internal chambers. As the rotors rotate, the small gap between them allows gas to be drawn in and compressed. As the rotors continue to rotate, the compressed gas is pushed to the outlet of the casing, further compressed, and discharged. In this process, intake and exhaust valves control the flow of gas, ensuring that the gas can only move in one direction.