Method and apparatus for selectively varying the flow rate...

Details Method and apparatus for selectively varying the flow rate... Method and apparatus for selectively varying the flow rate...

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 7/00 (2006.01) F04C 18/00 (2006.01) F04C 19/00 (2006.01)

Patent

CA 2131513

A two stage liquid ring vacuum pump having a selectively variable flow rate of service liquid through a first stage and a second stage. The flow rate through the second stage is reduced by venting service liquid from the second stage prior to normal passage through a discharge port. The vented service liquid is introduced in the first stage to enhance the pumping capacity of the first stage.

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