Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1998-01-12
1999-05-25
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
277523, 25131514, F16K 4104, F16J 1524
Patent
active
059063548
ABSTRACT:
An improved ball valve for lethal gas or fluid service is disclosed having a novel triple redundant stem to bonnet seal design. A ceramic seal ring forms the primary stem to bonnet seal. The ceramic seal ring has a first seal surface lapped for sealing engagement with a corresponding lapped surface on the stem and a second seal surface lapped for sealing engagement with a corresponding lapped surface on the bonnet. The ceramic seal ring first seal surface lapped for sealing engagement with a corresponding lapped surface on said stem and the corresponding lapped surface on the stem may be frustoconically or spherically shaped. An elastomeric seal and a compression type seal between the stem and bonnet act as redundant seals. A preloading means to maintain the ceramic seal ring and lapped sealing surfaces on the bonnet and stem in sealing engagement is shown.
REFERENCES:
patent: 3151837 (1964-10-01), Bentley-Leek
patent: 3216697 (1965-11-01), Holmberg
patent: 3218024 (1965-11-01), Kroekel
patent: 3257095 (1966-06-01), Siver
patent: 3371676 (1968-03-01), Mullaney, III
patent: 3425663 (1969-02-01), Priese
patent: 3586289 (1971-06-01), Priese
patent: 3787060 (1974-01-01), Astill et al.
patent: 4773442 (1988-09-01), Lephilibert
patent: 5192049 (1993-03-01), Ridge
patent: 5407176 (1995-04-01), Nevrekar
patent: 5531244 (1996-07-01), Siver
McCannaseal.RTM. Ball Valves Brochure, Feb. 1997, pp. 1-24.
Gilbert Gregory N.
Walker Curry B.
Sigma Scientific Technology, Inc.
Walton George L.
LandOfFree
Ball valve for lethal gas or fluid service 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 valve for lethal gas or fluid service, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball valve for lethal gas or fluid service will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-397611