Henry R Sonderegger

US Patent:

45523320, Nov 12, 1985

Filed:

Jun 27, 1984

Appl. No.:

6/624865

Inventors:

Henry R. Sonderegger - Barrington RI
Charles Chatterley - Coventry RI

Assignee:

ITT Corporation - New York NY

International Classification:

F16K 5100

US Classification:

251148

Abstract:

The sealing element of a butterfly valve includes a rigid support ring, and an elastically yieldable sealing ring which partially embeds the support ring within itself. The sealing ring has an inner portion which is juxtaposed with the inner periphery of the support ring, and two end portions which emerge with the inner portion and extend therefrom in the radially outward direction in juxtaposition with respective axial end faces of the support ring. At least one of the end portions of the sealing ring terminates before it reaches the outer peripheral surface of the support ring, so that it exposes an annular zone of one of the axial end faces of the support ring. An annular, circumferentially complete, projection of the valve body extends into the passage at the downstream end thereof as considered in the direction of fluid flow through the passage in the fully open position of the valve member. The exposed zone of the one axial end face of the support ring of the sealing element then abuts against this annular projection to detain the support ring and thus the entire sealing element in position against displacement in the axially downstream direction under the action of the fluid pressure on the sealing element. The upstream end portion of the sealing ring is clamped between the thus detained support ring and a holding member mounted on the valve body, to provide a sealing effect at this region.