Annular piston valve

Details Annular piston valve Annular piston valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/138

F16K 51/00 (2006.01) F16K 1/12 (2006.01) F16K 25/04 (2006.01)

Patent

CA 1175318

ABSTRACT OF THE DISCLOSURE A valve construction wherein a streamlined flow diverter is centered within a cylindrical valve body. A slidable annular seat ring is biased upstream to seal against a seating surface on the inwardly tapered downstream side of the flow diverter and is biased by fluid pressure so that the valve opens when line pressure exceeds the control pressure. The inner contour of the retractable seat ring and the tapered outer contour of the downstream side of the flow diverter are such that the minimum flow area between them occurs a short distance downstream of the seating surface and is thereafter maintained or slightly increased gradually to an abrupt termination of the tapered surface.

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