Rotary vane pumps calculations

Air at 20 °C is evacuated from a chamber using a rotary vane pump (S0 -240 m3 h-1) via a 10 m x DN63 tube. If the pressure at the pump inlet is 6 mbar, calculate pch (pressure in the chamber) and S. ... 

A single-stage rotary vane pump ( S0 = 25m3h ) is used to remove residual water from a vacuum vessel which has been cleaned, washed with demineralised water and drained. The pump is fitted with an oil-mist filter. If the exhaust temperature is 75 °C and ambient air ( T= 20 °C, RH = 50%, p0 = 1013 mbar) is used as the ballast gas, calculate the maximum amount of water that can be handled by the pump. (Assume that the pump is directly connected to the chamber.)... 

Related Calculations. Use this procedure for any type of rotary pump—gear, lobe, screw, swinging-vane, sliding-vane, or shuttle-block—handling any clear, viscous liquid. Where the liquid is gas-free, apply only the viscosity correction. Where the liquid viscosity is less than 600 SSU but the liquid contains gas or air, apply the entrained or dissolved gas correction, or both corrections. 

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