Cock having a spherical plug

Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve

Patent

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251315, F16K 2500

Patent

active

045026637

ABSTRACT:
The present invention relates to a cock having a spherical plug which is supported between two annular sealing elements intended to seal the inlet channel and outlet channel thereof, of which two sealing members at least one consists of a resilient sealing member engaging said plug of said cock in an axially prestressed condition and of a coaxially located support member which limits the axial movement of said plug due to an operating pressure, which axial movement causes a deformation of the sealing member. In order to have an excellent sealing of the cock at unlimited temperature and simultaneously small operating moments the annular sealing element is shaped as a thin-walled sheet metal body which at one end is rigidly mounted to the casing of the cock and which sheet metal body comprises two coaxially arranged ring shaped sections, of which the one is shaped and arranged as deformable sealing member and the other is shaped and arranged as rigid support member mounted to said casing.

REFERENCES:
patent: 2573177 (1951-10-01), Bohlen
patent: 3394915 (1968-07-01), Gachot
patent: 4217923 (1980-08-01), Kindersley
patent: 4247079 (1981-01-01), Friess
patent: 4326697 (1982-04-01), Autage et al.

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