Valves and valve actuation – With means to increase head and seat contact pressure – Fluid pressure
Patent
1992-02-03
1993-08-10
Walton, George L.
Valves and valve actuation
With means to increase head and seat contact pressure
Fluid pressure
251309, 251317, F16K 2500, F16K 504, F16K 518
Patent
active
052341933
ABSTRACT:
An improved rotary plug valve of the type having a valve body with a fluid inlet conduit and a fluid outlet conduit therein has a rotary plug disposed for rotation in the valve body between an open position and a closed position. In the closed position the plug has a seat seal disposed in a groove in the cylindrical surface thereof which seat seal extends adjacent and surrounds the fluid inlet conduit to seal the inlet conduit against fluid flow. The groove in the plug has a radially inner wall, a radially outer wall and a base wall. The base wall extends at an angle so that the radially outer wall extends more deeply into the plug than the radially inner wall. Preferably the groove and the seat seal have an annular, cylindrical shape. Also preferably the seat seal has a shape so that a pressure space is formed adjacent the base wall of the groove and a gap is formed adjacent the radially inner wall of the groove. Fluid pressure in these urge the seat seal into sealing positions. Also preferably the seat seal has a greater curvature in the direction of its leading and trailing edges, when not under pressure, than the surface of the plug so that the seat seal is less prone to cutting as it moves over the inlet opening.
REFERENCES:
patent: 2604293 (1952-07-01), Phillips
patent: 2844353 (1958-07-01), Gurries
patent: 2852226 (1958-09-01), Wheatley
patent: 2970805 (1961-02-01), Pool
patent: 3033226 (1962-05-01), Allen
patent: 3787028 (1974-01-01), Semon
patent: 4015816 (1977-04-01), Semon
patent: 4262880 (1981-04-01), Danko et al.
patent: 4611626 (1986-09-01), Logsdon
patent: 4982760 (1991-01-01), Mustaklem
patent: 5037067 (1991-08-01), Ray
Neal, Jr. Leonard D.
Thomas John H.
Morgan Christopher H.
Parker-Hannifin Corporation
Walton George L.
LandOfFree
Rotary plug valve with seat seal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary plug valve with seat seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary plug valve with seat seal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1720509