Butterfly valve assembly

Details Butterfly valve assembly Butterfly valve assembly

1975-09-17

1977-06-28

Cline, William R.

Valves and valve actuation

Rotary valves

Butterfly

251308, F16K 122

Patent

active

040321088

ABSTRACT:
A butterfly valve assembly particularly suitable for large size fluid-carrying pipes. Instead of using a unitary disc as the rotatable valve element, two offset half discs are provided, staggered by the diameter of a pipe or sleeve surrounding and connected to the shaft which is rotated to open and close the valve. Sealing half-rings connected to each half disc and projecting beyond their perimeters abut against a radially inwardly extending shoulder on an interconnecting pipe or housing between two confronting large pipe ends. Thus no rubbing of the sealing parts results and a positive seal is provided. Means are provided for access to the butterfly disc assembly for replacing the sealing half rings without taking the entire assembly from the line.

REFERENCES:
patent: 399390 (1889-03-01), Eareckson
patent: 813771 (1906-02-01), Bush
patent: 1168332 (1916-01-01), Riley
patent: 1188462 (1916-06-01), McCormack
patent: 2883149 (1959-04-01), Fiorentini
patent: 3030069 (1962-04-01), Cummins
patent: 3620242 (1971-11-01), Pease
patent: 3893469 (1975-07-01), Baker

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