Improved snuffback valve for hot melt adhesive

Details Improved snuffback valve for hot melt adhesive Improved snuffback valve for hot melt adhesive

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 51/00 (2006.01) B05C 5/02 (2006.01) F16K 23/00 (2006.01)

Patent

CA 2342382

A snuffback valve assembly comprising a snuffback valve element having a tapered frusto-conically disposed downstream end portion for moving aerodynamically with respect to highly-viscous materials so as to effectively eliminate the phenomenon of bursting upon movement of the snuff-back valve element from the closed to opened positions, and an upstream end portion which comprises an annular portion disposed perpendicular to the axis of the valve element, and a sharp-cornered region, for disrupting the flow parameters of the viscous material and for maintaining vacuum conditions within a valve chamber so as to prevent stringing of the viscous material when the valve element is moved from the opened to closed positions.

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