Butterfly valve

Details Butterfly valve Butterfly valve

1990-03-23

1991-07-09

Schwadron, Martin P.

Valves and valve actuation

Rotary valves

Butterfly

251367, F16K 1226

Patent

active

050298119

ABSTRACT:
A butterfly valve is described, including: a valve body made from synthetic material and having an internal cylindrical fluid passage; a movable disk valve disposed in the valve body for controlling the opening and closing of the fluid passage; a seated ring made from elastic material inserted between the valve body and the disk valve for closing the fluid passage when the disk valve is in a closed position; a shaft hole formed in the valve body into which a stem is inserted; a shaft cylinder formed to extend outwardly from an outer circumference of the valve body in corresponding with the shaft hole, the stem being inserted into the shaft cylinder and holding the valve axially, the valve body being divided along at least one division line formed across the fluid passage and being composed of plural divided parts, each divided part being joined at a joining surface extending circumferentially to form one complete valve body and being produced with a plurality of cavity portions in order to achieve light weight and required thickness, and the seated ring being fitted into an inner circumference of the valve body.

REFERENCES:
patent: 3567180 (1969-09-01), Williams
patent: 4241897 (1980-12-01), Maezawa
patent: 4826133 (1989-05-01), Hiltebrand

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