F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/48
F16K 5/14 (2006.01) F16K 5/06 (2006.01)
Patent
CA 1135677
ABSTRACT A ball valve is provided especially for use between adjacent sections of a pipe line conducting an inflammable fluid and comprises a valve housing, a valve ball (2) in the housing and having a through passage, a trunnion in the housing projecting into a first socket in the ball, and a control shaft projecting into and drivingly engaging a second socket in the ball diametrally opposed to the first socket. A pair of annular valve seat members (4) spaced axially of the pipe line carry sealing rings (8), spring means (9) urging the seat members towards the ball, Each seat member at its end adjacent the spring means has a frusto-conical portion (11) which tapers from a shoulder (12) on the seat member towards the end face (4A) of the latter. A graphite ring (13) is fitted between the frust-conical portion and the adjacent peripheral wall of the housing and a first spacer ring (14) is located between the graphite ring and the shoulder. Furthermore, an annular pressure plate (15) is located between the end face of the seal member and the spring means and is abutted by the latter and has an annular lip (15A) abutting the graphite ring. Additionally, a second spacer ring (16) is provided between the end face of the seat member and the pressure plates. In the event of fire in the pipe line, the sealing ring and spacer rings disintegrate so that the spring means pushes the seat member into metal-to- metal sealing contact with the ball, and pushes the pressure plate relative to the seat member so that the lip on the pressure plate pushes the graphite ring along the frusto- conical portion towards the shoulder so that the graphite ring becomes tightly wedged between the frusto-conical portion and the adjacent peripheral wall of the housing and seals the clearance passage therebetween against the spread of fire therealong.
361350
Fetherstonhaugh & Co.
Tk Valve Limited
LandOfFree
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 Ball valves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball valves will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-125172