Ball type valve having improved redundant sealing system
US4342330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Aug 18, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6045
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved ball-type valve apparatus adapted for use in flowlines which provide a straight through flow path which minimizes flow turbulance and flow resistance in either direction through the valve housing. The ball is rotated by a crank between the open and closed positions for controlling flow through the valve. Oppositely facing seat rings engage the ball on opposite sides to provide a dual redundant sealing system with the primary seals located at the upstream seat with the secondary seal formed at the downstream seat. An access plug retains the ball in the valve housing and is secured with the valve housing by a segmented locking ring. When the plug is removed from the housing maintenance or assembly access to the ball, seat rings and their retaining means without disturbing the connections of the valve housing in the flowlines is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.