Ball Valve

Details Ball Valve Ball Valve

1986-04-07

1987-01-06

Schwadron, Martin P.

Valves and valve actuation

With means to increase head and seat contact pressure

Separate actuators or actuator motion

137559, 251315, 251316, F16K 2500

Patent

active

046340980

ABSTRACT:
In a valve of the ball or globe type operating means are provided to cause movement of the closure member in an angular mode about an axis of rotation and in a radial direction with respect to such axis in order that the closure member may be removed from the seat prior to subtantial angular movement. The operating means comprises two concentric stems one of which comprises an eccentric portion journalled with the closure member which eccentric portion provides the radial movement. The housing comprises an inspection port against which the closure member may be sealed while the valve remains open permitting inspection and replacement of the main seal through the inspection port while fluid continues to flow through the valve.

REFERENCES:
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patent: 1442452 (1923-01-01), Taylor
patent: 3284046 (1966-11-01), Allenbaugh, Jr.
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patent: 3893469 (1975-07-01), Baker
patent: 3941351 (1976-03-01), Graham
patent: 4029292 (1977-06-01), Kramer et al.
patent: 4141536 (1979-02-01), Graham
patent: 4174090 (1979-11-01), Nelimarkka
patent: 4174825 (1979-11-01), Nelimarkka
patent: 4273152 (1981-06-01), Freeman

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