Seal for butterfly valves

Details Seal for butterfly valves Seal for butterfly valves

1974-07-11

1976-05-25

Lanham, C. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291567A, 29DIG3, 228151, 251306, B23P 1500, F16K 1226

Patent

active

039583147

ABSTRACT:
A new and improved butterfly valve, and particularly, an inexpensive seal therefor. A valve body having a fluid passage is provided with a flexible valve seat about the periphery of the passage, while a butterfly valve disc is journalled within the passage for movement between an open and closed position and includes an annular, radially outwardly extending, peripheral lip. The lip receives a C-shaped hoop which may be stamped, rolled or extruded from a corrosion resistant material for sealingly engaging the valve seat when the disc is in the closed position. Suitable sealing means may be interposed between the hoop and the valve disc. The use of such a hoop permits the construction of a more economical valve than those heretofore known.

REFERENCES:
patent: 402696 (1889-05-01), Strong
patent: 2574509 (1951-11-01), Stuart
patent: 2907548 (1959-10-01), Maas et al.
patent: 3276739 (1966-10-01), Freed
patent: 3347261 (1967-10-01), Yancey
patent: 3425439 (1969-02-01), Duffey et al.
patent: 3447781 (1969-06-01), Fawkes
patent: 3544066 (1970-12-01), Fawkes
patent: 3749359 (1973-07-01), Montesi
patent: 3787960 (1974-01-01), Greenleaf

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