The lubricated rotary vane vacuum pumps are used when the intake flow may contain moisture, or when a better final pressure is required.

These pumps may run continuously within certain pressure ranges, or connected to containers to be emptied, whose volume is appropriately sized for the pump flow rate. Long-term use at atmospheric pressure is not recommended.
The lubrification allows this pumps to intake water vapour. To avoid a condensation of the water vapour, the lubricated rotary vane vacuum pumps are equipped with the gas ballast, a system that introduces air in the compression stage and changes the vapour saturation pressure thus avoiding the condensation. Into the WR pump version the gas ballast system is improved and reinforced.

Main application fields