Fluid transfer systems and valves therefor

Details Fluid transfer systems and valves therefor Fluid transfer systems and valves therefor

F - Mech Eng,Light,Heat,Weapons

04

B

137/27

F04B 49/00 (2006.01) F04D 9/00 (2006.01) F16K 31/18 (2006.01)

Patent

CA 1064366

Abstract of the Disclosure A pumping system intended especially for highly contaminated liquids uses an air pump for selectively drawing liquid into or discharging the liquid from a vessel by creating respectively a vacuum or a pressurized condition within the vessel. A special primary valve device is provided for the system comprising an air filter in combination with a float-actuated, shut-off switch to preclude the entry of air or liquid-borne contaminants into the pump. The float-actuated switch is arranged to disable an engine used for driving the pump. The system also comprises a secondary float valve located between the pump and the primary valve device in case the primary valve device leaks, to preclude the passage of liquid therebetween, the valve having a sight glass to detect leakage liquid and a drain cock to permit drainage of such liquid.

245542

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