rotary vane pump

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
drive (3) and the inlet and wall plug (4). The outlet valve is oil-sealed. The inlet valve is designed as a
vacuum safety valve that’s always open during operation. The working chamber (5) is situated
inside the casing. Rotor and vanes divide the Rotary Vane Vacuum Pumps operating chamber into two separate spaces having
adjustable volumes. As the rotor turns, gas flows into the enlarging suction chamber until it is sealed
off by the next vane. The enclosed gas is usually compressed until the outlet valve opens against
atmospheric pressure. In the case of 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 with the aid of a motor mounted on it.