Rotary vane vacuum pump working principle

Rotary vane vacuum pumps are mostly small and medium-sized vacuum pumps. Rotary vane vacuum pump has two kinds of single stage rotary vane vacuum pump and two stage vacuum pump. The so-called double stage rotary vane vacuum pump is to connect two single stage pumps in series. It is usually made in two stages to achieve higher vacuum.

The relationship between the pumping speed and the inlet pressure of the rotary vane vacuum pump is as follows: the pumping speed of the rotary vane vacuum pump should not be lower than 95%, 50% and 20% of the nominal pumping speed of the pump at the inlet pressure of 1333 3Pa, 1.33 Pa and 1.33 *10-1 (Pa).oil-diffusion-vacuum-pump-return-oil-how-to-maintain

When the rotary vane vacuum pump works, the exhausted gas is first entered into the high vacuum level through the suction cylinder. When the inhalation pressure is high, part of the gas is discharged by the exhaust valve 2, and the other part of the gas is discharged by the exhaust valve 1 through the low vacuum stage. When the suction gas pressure is low, although the high vacuum stage compression, but the exhaust valve 2 still can not open the exhaust, can only continue to compress through the low vacuum pole, exhaust valve 1 discharge, because the limit vacuum of the two-stage pump than single-stage pump.rotary-vane-vacuum-pump-gas-ball-valve