Valves and valve actuation – With means to increase head and seat contact pressure – Gate valve
Patent
1994-09-07
1995-07-25
Fox, John C.
Valves and valve actuation
With means to increase head and seat contact pressure
Gate valve
251330, F16K 316, F16K 4118
Patent
active
054355206
ABSTRACT:
A backseat assembly for an expanding gate valve includes a sealing member slidingly disposed about the stem and a biasing member biasing the sealing member away from the gate. Upon the gate and segment traveling to the open position of the valve, the segment engages the valve housing and stops its further movement. The stem and gate continue their travel with the sealing member engaging an annular seat on the housing for sealing between the stem and housing. The sealing member includes an annular resilient sealing member which initially engages the annular seat of the housing. The biasing member places a preload on the sealing member such that upon engagement of the annular seat by the sealing member, there is initial sealing force placed on the sealing engagement. The fluid pressures within the valve chamber add an additional sealing force to the sealing member.
REFERENCES:
patent: 2002780 (1935-05-01), Laurent
patent: 2148628 (1939-02-01), Laurent
patent: 2479124 (1947-11-01), Laurent
patent: 2502689 (1950-04-01), Yant
patent: 3013769 (1961-03-01), Volpin
patent: 3026895 (1962-02-01), Volpin
patent: 3051434 (1962-08-01), Gulick
patent: 3412750 (1966-10-01), Volpin
patent: 4682757 (1987-07-01), Shelton
Cooper Industries Inc.
Fox John C.
Rose David A.
LandOfFree
Backseat assembly for an expanding gate valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Backseat assembly for an expanding gate valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backseat assembly for an expanding gate valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-735266