G - Physics – 01 – M
Patent
G - Physics
01
M
73/118
G01M 3/00 (2006.01) G01M 3/02 (2006.01) G01M 3/26 (2006.01)
Patent
CA 2014899
Abstract of the Disclosure An evacuation unit for testing the fluid tightness of a closed fluid system, filling the system with system fluid, and/or purging the system fluid of entrained gas. The evacuation unit includes a source of system fluid, an air operated venturi vacuum pump, a hose for releasable and sealable connection to an access port of the closed fluid system, and a three way valve for selected positioning between a first position communicating the vacuum pump with the flexible hose system to produce a vacuum in the system, a second position isolating the flexible hose and system to test for fluid tightness, and a third position communicating the system fluid source with the flexible hose and system for filling the system through the access port with system fluid. Multiple reservoirs may be employed for filling the system with multiple fluids through the use of a reservoir sequence valve. The sequence valve permits filling the system by drawing liquid from multiple sources in a predetermined sequence. A method of testing the fluid tightness of the system and filling the system with system fluid without disconnecting the evacuation unit is also disclosed.
de Rome Raymond D.
Marks & Clerk
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