Method and apparatus for flushing the plunger of a positive...

Details Method and apparatus for flushing the plunger of a positive... Method and apparatus for flushing the plunger of a positive...

F - Mech Eng,Light,Heat,Weapons

04

B

103/38

F04B 15/00 (2006.01)

Patent

CA 1044952

METHOD AND APPARATUS FOR FLUSHING THE PLUNGER OF A POSITIVE DISPLACEMENT PUMP ABSTRACT OF THE DISCLOSURE A method and apparatus for flushing the plunger of a positive displacement pump which handles a suspension of abrasive particles. Plush liquid is introduced at two or more locations to the packing surrounding the pump plunger. The larger volume of flush liquid is introduced in front of the packing to wash abrasive particles from the plunger in the usual manner. smaller volume is introduced intermediate front and back sets of packing rings. Initially the back packing rings provide the seal for the plunger, but when they wear, flush liquid from between the two sets of packing rings leaks past the back packing rings to furnish an indication of the wear. The front packing rings now provide the seal, and it is known that the back packing rings should be replaced.

296022

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