Rotary ball valve

Details Rotary ball valve Rotary ball valve

1973-11-15

1976-04-06

Myhre, Charles J.

Valves and valve actuation

Rotary valves

Ball valve

251360, 251365, F16K 500

Patent

active

039484807

ABSTRACT:
A rotary ball valve includes a seat support integral with the valve body, a rotatable ball, a movable seat support, a retaining ring, and, on opposite sides of the ball, thin annular seating rings made from a material, such as tetrafluoroethylene. When the valve is assembled, the seating rings are deformed to engage the ball and supports and undergo a small amount of cold-flow outwardly toward interior passage walls of the valve body so that the outer periphery of the seat rings engages and forms a seal between the ball member and the interior passage wall. The seat-engaging surfaces of the seat supports each have grooves into which the seating rings cold-flow during valve assembly. Ribs are thus formed on the seating rings which keep the seats from rocking. The valve also provides an improved stem seal, including a Belleville washer confining a tetrafluoroethylene washer. In addition, the valve includes a handle having a novel projection for limiting movement of the ball to 90.degree. and for aligning the ball in its fully opened and fully closed positions.

REFERENCES:
patent: 2839266 (1958-06-01), Kaiser
patent: 3228652 (1966-01-01), Antrim
patent: 3239191 (1966-03-01), Widera
patent: 3288430 (1966-11-01), Priese
patent: 3348805 (1967-10-01), Sanctuary
patent: 3384341 (1968-05-01), Ripert
patent: 3717323 (1973-02-01), Geipel

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