End entry ball valve with seal wear compensation and force isolated seal
US4099705A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Aug 19, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K27/067
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an end entry ball valve assembly, a bifurcated seal carrier comprised of an annular seal support member and back-up member, is received in at least one end opening. The seal support member includes an axially facing end wall and a radially facing guide wall. The back-up member is slidably received in the opening and presents a recess defined by an axially facing support wall and a radially facing guide wall respectively adjacent the end wall and guide wall of the seal support member. An annular, resilient biasing and sealing ring is disposed, in a radially tensioned and axially compressed condition, in a groove disposed in at least one of those axially facing walls at a location radially inwardly of the guide walls. The ring biases the seal support member and a seal carried thereby toward the valve ball and seals against fluid flow between the axially facing walls. The seal support member is dimensioned for limited radial centering movement in the receiving recess without direct compressive resistance by the biasing and sealing ring. Longitudinal loads on the back-up member are isolated from the valve ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.