These have lower noise and vibration levels than blower style vacuums with high efficiency and long operating life

distillation, dehydration and filtration processes, GLS lamps, mercury vapor lamps and tubes, exhausting electronic tubes, refrigerator and air-conditioner servicing, freeze drying of food, vacuum metallurgy, vacuum sublimation

Oil-immersed, rotary vane type pump has a rotor with two spring loaded vanes mounted eccentric in the stator body,

These pumps have in-built machined non-return valves that prevent back flow parts, which are grounded and assembled with close tolerances.