Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1975-06-25
1976-10-12
Weakley, Harold W.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
137315, 251174, 251315, F16K 2500
Patent
active
039853349
ABSTRACT:
A ball valve with an actuator wherein a seal assembly with a combination O-ring swivel and seal for producing a tight seal is hidden in a pocket isolated from the flow of fluid through the valve by an inlet reentrant flange and the valve body. The swivel and other parts of the seal assembly including but not limited to the seal thereof, because the O-ring swivel makes the seal assembly mount tenuous and subject to chattering and vibration, can be damaged. This is true because the seal assembly seal receives large and rapid impact loads. The chattering and vibration also thereby produce serious damage to and wear on the seal assembly seal. A great deal of chattering and vibration is usually caused by exposing the seal assembly to the fluid passing through the valve. In the ball valve disclosed herein this is prevented by mounting the seal assembly in the isolated pocket. The valve disclosed herein also has other features. For example, eccentrics release the seal assembly spring for assembly and disassembly of the ball and other component parts. Access for repair or otherwise is also provided even though the valve has an actuator mounted thereon and is welded into a pipeline. A composite two-layer seal assembly seal is provided for low temperatures.
REFERENCES:
patent: 3037738 (1962-06-01), Jackson
patent: 3134396 (1964-05-01), Bredtschneider
patent: 3463448 (1969-08-01), Picardo
patent: 3565392 (1971-02-01), Bryant
patent: 3795384 (1974-03-01), Reddy
patent: 3890991 (1975-06-01), Grove
International Telephone and Telegraph Corporation
Stolzy A. Donald
Weakley Harold W.
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