Valve

Details Valve Valve

F - Mech Eng,Light,Heat,Weapons

16

L

251/1

F16L 55/10 (2006.01) B05B 5/06 (2006.01) B05B 7/22 (2006.01) H05H 1/42 (2006.01)

Patent

CA 1271465

ABSTRACT OF THE DISCLOSURE A powder feed control system employs an arrangement of conduits and valves for selectively directing a gas flow either through a powder feeder or through a bypass so as to quickly and precisely control the introduction of powder Into and the removal of powder from the gas flow in a plasma spraying system. The arrangement of conduits and valves includes a two-way solenoid operated valve for directing the gas flow either into a powder feeder through a main conduit or into a bypass conduit which rejoins the main conduit on the other side of the powder feeder at a powder shutoff valve and a bypass and check valve. The bypass and check valve insures that the gas flow in the by- pass conduit flows to the output rather than upstream to the powder shutoff valve. The powder shutoff valve includes a resilient member mounted within the bore of a housing and collapsible upon itself to close off an internal bore therein in response to the introduction of pressurized gas into a space between the housing bore and the resilient member. Air introduced into a cannister in the powder feeder with the loading of powder into the cannister is removed by an arrangement which includes a valve for selectively coupling the inside of the cannister to a vacuum source.

559287

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