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A rotary vane vacuum pump is an oil-sealed rotary displacement pump. The pumping system
consists of a housing (1), an eccentrically installed rotor (2), vanes that move radially under spring
pressure (3) and the inlet and wall plug (4). The wall plug valve is usually oil-sealed. The inlet valve is designed as a
vacuum safety valve that’s always open during operation. The working chamber (5) is located
inside the Air Compressor casing. Rotor and vanes divide the operating chamber into two separate spaces having
adjustable volumes. As the rotor turns, gas flows in to the enlarging suction chamber until it really is sealed
off by the next vane. The enclosed gas can be compressed before outlet valve opens against
atmospheric pressure. Regarding gas ballast operation, a hole to the exterior is opened, which
empties in to the sealed suction chamber on the front side.
The Rotor moves by making use of a motor mounted on it.