| Structure and Movement PrincipleRotary Vane Vacuum PumpLike as Figure-1-1 (a), it is composed of the rotor with blades grooved and the front, back of cylinders being the two eccentric shape. Like as Figure-1-1(b), the air is inhaled cylinder through the Inlet port. As this process continues just before passing by the Inlet port, the inhaled air is confined between blades like as Figure (4) for the blade to pass the Inlet port.After passing by the outlet valve like as Figure (5), it starts compressed. As the exhaust valve is opened after the enough compression (about over 850 Torr ), the compressed air is extruded through the exhaust valve. | 
