Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve
Patent
1973-11-09
1976-04-13
Cohan, Alan
Valves and valve actuation
With means to increase head and seat contact pressure
Seat pressed to valve
251214, 251315, 251317, F16K 322
Patent
active
039499650
ABSTRACT:
A small ball valve for chemically active materials is provided which does not require the strength of metal parts and which permits the use of brittle material such as glass or ceramic as well as materials such as fluorocarbon polymers and polytetrafluoroethylene which are resistant to the action of chemically active fluids. A free-floating construction is provided without requiring a stem packing gland and permitting the stem to be integral with the ball. Identical sealing rings are provided with clamping screws which press the sealing rings inward against the ball and outward against the openings in the valve body, the diameter of the valve stem being smaller than the opening in the sealing ring and clamping screw therefor so that the portion of the ball surrounding the valve stem may also float freely under the sealing means with the seal around the ball stem being against the ball itself instead of against the valve stem. For reinforcement of the valve body or to permit the use of the valve when the controlled fluid is under high pressure a metal reinforcing ring may be fitted around the valve body.
REFERENCES:
patent: 2695628 (1954-11-01), Wheildon
patent: 2845949 (1958-08-01), Parker
patent: 3026899 (1962-03-01), Mischanski
patent: 3111136 (1963-11-01), Persidsky
patent: 3385313 (1968-05-01), Okada
patent: 3458172 (1969-07-01), Burrows
patent: 3550902 (1970-12-01), Pidgeon
patent: 3717323 (1973-02-01), Geipel
patent: 3735956 (1973-05-01), Matousek
Sharples Thomas D.
Taylor John T.
Beckman Instruments Inc.
Cohan Alan
Mehlhoff F. L.
Steinmeyer R. J.
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