Valves and valve actuation – With correlated flow path – Pipe coupling or union
Patent
1977-03-04
1979-02-06
Weakley, Harold W.
Valves and valve actuation
With correlated flow path
Pipe coupling or union
251173, 251306, F16K 5100
Patent
active
041380908
ABSTRACT:
A high-pressure butterfly valve having pressure enhanced sealing which comprises a valve body defined by a pair of interfitting body plates that are retained in assembly by bolts that also secure the valve mechanism into a flow line. The interfitting valve plates also cooperate to define a seal recess within which is received annular sealing means that provide a peripheral seal about a butterfly disc that is rotatably supported within a flow passage defined by the valve body plates. The annular sealing means also includes a pressure-responsive portion that is energized by pressure upstream of the butterfly element and which is directly responsive to pressure to urge the sealing portion thereof into sealing engagement with the periphery of the butterfly element. The valve body is so constructed that the downstream plate thereof may be secured in assembly with the upstream plate by bolts extending through an upstream pipe flange, thereby allowing the valve mechanism to be employed in the absence of any abutting relationship with a downstream pipe flange. The pressure enhancing feature of the annular sealing means also induces pressure enhanced sealing about a valve stem and trunnion that support the butterfly element for rotation within the flow passage of the valve and pressure enhanced sealing of the joint between the body plates. The two-way sealing ability of the valve is accomplished by communicating fluid pressure from the upstream line through a passage system in the disc and trunnion that communicates the upstream pressure to an annular seal chamber.
REFERENCES:
patent: 1834870 (1931-12-01), Bogers
patent: 1990309 (1935-02-01), Phillips
patent: 2488380 (1949-11-01), Danks
patent: 2673708 (1954-03-01), Danks
patent: 2911184 (1959-11-01), Moore
patent: 2939674 (1960-06-01), Anderson
patent: 2965354 (1960-12-01), Grove
patent: 3095177 (1963-06-01), Muller
patent: 3722856 (1973-03-01), Koch
Stanley Carlton H.
Sumner Joe D.
Jackson James L.
Weakley Harold W.
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