Method of fabricating a butterfly valve

Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator

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Details

29463, 29434, B23P 1500

Patent

active

039614050

ABSTRACT:
The butterfly valve includes a body having a generally cylindrical bore defining a flow passage and a generally circular, stem-mounted disc member rotatably mounted within the bore for shutting off flow. The disc member is comprised of two identically arranged halves which are formed from an inexpensive, relatively thin material. The disc halves include central semicylindrical portions defining a hub for receiving the stem and a flange defining a continuous, peripheral groove including diametrically opposed annular portions which encircle the stem. Disposed in the disc groove is a unitary, resilient sealing ring including annular sections which engage flattened portions of the bore to provide stem seals throughout all positions of the disc and semicircular portions which sealingly engage the bore when the disc member is in a closed position.
The disc halves and sealing ring can be assembled together before installation of the disc member into the valve body bore or assembled together inside the valve body bore.

REFERENCES:
patent: 3029063 (1962-04-01), Moen
patent: 3396448 (1968-08-01), Kisling
patent: 3526385 (1970-09-01), Rohrer
patent: 3549123 (1970-12-01), Bell et al.
patent: 3565395 (1971-02-01), Hansen
patent: 3567180 (1971-03-01), Williams

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