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1. (WO2013158730) PRESSURE COMPENSATING WET SEAL CHAMBER

Pub. No.:    WO/2013/158730    International Application No.:    PCT/US2013/036919
Publication Date: Fri Oct 25 01:59:59 CEST 2013 International Filing Date: Thu Apr 18 01:59:59 CEST 2013
IPC: F04D 29/12
Applicants: PENTAIR FLOW TECHNOLOGIES, LLC
Inventors: GOULET, Doug
HERMES, Jeff
Title: PRESSURE COMPENSATING WET SEAL CHAMBER
Abstract:
Some embodiments of the invention provide a pump including a pump chamber, a shaft at least partially positioned in the pump chamber, an impeller coupled to the shaft, and a seal coupled to the shaft. The pump also includes a wet seal chamber with a first fluid. The wet seal chamber can include a bladder that compresses to compensate for volumetric expansion of the first fluid. The wet seal chamber substantially prevents fluid from contacting the seal in order to prolong a life of the seal.