Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1978-09-27
1981-04-07
Schwadron, Martin P.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
251315, 251368, F16K 506
Patent
active
042601312
ABSTRACT:
A ball valve assembly that is uniquely suited for use in extremely high and low temperature applications where solid particles are frequently present within a flowing fluid. The valve includes a one-piece ball and stem or shaft element and the bore of that ball together with separate, removable end members, inserted from opposite directions into a passage extending through the valve body, form the valve's fluid-flow path. The valve body includes a second bore which can either extend through the entire valve body, perpendicularly with the other passageway, or can instead extend perpendicularly from that passageway to the exterior of the valve body in only one direction. The ball stem is rotatably retained and sealed in this second bore and the bore is dimensioned so as to be at least as large as the diameter of the ball so that the ball can be removed therethrough. In one embodiment the inner ends of the separate end members forming part of the fluid flow path are shaped to correspond to the exterior shape of the ball and contain a solid seat and a solid elastically compressible behind-the-seat seal. In another embodiment in-line removal of the ball and stem element is possible due to the use of separate cylindrical sealing elements positioned between the ball which also form part of the flow passage and seal the area between the ball and end members. The mating surfaces of the end members and the cylindrical elements are curved in a cooperating fashion to allow the cylindrical elements to rotate around the end members into a recess located in the valve body so that the ball can easily be removed through the second bore.
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Kamyr Valves Inc.
Schwadron Martin P.
Spiegel H. Jay
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