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US 4,899,984 AGranted
Obturator ring for butterfly valve
AssigneeABG Semca
InventorsPhilippe Strickler, Jean-Michel Renaux
Life of this patent
Estimating the term…
Abstract
Disclosed is an obturator ring for valves of the butterfly valve type which has, mounted in a groove made on the periphery of the flap, a split ring-shaped seal working with a first elastic member applying the seal against the valve body and a second elastic member applying the seal against the groove, the elastic members being made of a refractory material.
Claims8
An obturator ring providing imperviousness between a flap and a valve body of a butterfly valve for a wide range of pressures and temperatures, wherein said obturator ring comprises:
- a split ring-shaped seal, mounted in a groove made on the edge of the flap, and which comprises a first refractory material, said split ring-shaped seal working together with first elastic means for radially biasing the seal against the valve body and second elastic means, separate from said first elastic means, for biasing the seal axially against the groove, wherein the first and second elastic means each also comprise a second refractory material having a relatively high fatigue strength.
Dependencies are inferred from the claim text.