The present disclosure relates to a rotary vane vacuum pump 300 (300′) comprising a gas ballast assembly 330. The gas ballast assembly 330 comprises a gas ballast passage fluidly connected to a stator chamber 212 of the pump 300, a gas ballast valve 334 configured to selectively open and close the gas ballast passage depending on the relative gas pressure across the valve 334, and a gas ballast buffer chamber 360 fluidly connected to the gas ballast passage upstream of the gas ballast valve 343, which is in selective fluid communication with the exterior of the pump 300 (300′). The present disclosure also provides a related method of communicating ballast gas to a rotary vane vacuum pump 300 (300′).
Rotary vane vacuum pump with gas ballast assembly
2021-04-07
Patent
Electronic Resource
English
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