Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve
Patent
1989-01-03
1990-03-27
Fox, John
Valves and valve actuation
With means to increase head and seat contact pressure
Seat pressed to valve
251214, 251315, F16K 506
Patent
active
049114085
ABSTRACT:
A top entry ball valve (10) has a removable top plate (34) to permit the removal of a ball valve member (80). Valve seat assemblies (98, 100) each include a primary metal seat member (102), a concentric secondary elastomeric seat member (104), and a concentric rigid seat retainer 106. The primary metal seal member (104) has a free end portion (108) of a reduced thickness to engage the ball member (80) closely adjacent the bore (82). The valve ball member (80) is mounted for rotation on a lower trunnion (28) of the valve body (12) and an upper trunnion (40) of the top plate (34). A packing (70) about the stem (48) has a downward force exerted thereagainst by Belleville springs (74, 75) that is greater than the maximum internal pressure of the valve (10).
REFERENCES:
patent: 2825527 (1958-03-01), Wendell
patent: 2916254 (1959-12-01), Wendell
patent: 3067977 (1962-12-01), Anderson et al.
patent: 3211421 (1965-10-01), Johnson et al.
patent: 3542054 (1970-11-01), Works
patent: 4071041 (1978-01-01), Moran, Jr. et al.
patent: 4085770 (1978-04-01), Wononowicz
patent: 4290581 (1981-09-01), Moran et al.
patent: 4292989 (1981-10-01), Cozzanigo et al.
patent: 4318420 (1982-03-01), Calvert
patent: 4332267 (1982-06-01), Evans
patent: 4477055 (1984-10-01), Partridge
patent: 4519412 (1985-05-01), Grazioli
patent: 4696523 (1987-09-01), Iff
Fox John
Kemp Development Corporation
LandOfFree
Seat assembly for ball valves does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Seat assembly for ball valves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seat assembly for ball valves will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1645768