Valve stem packing containment for high pressure, high temperature
US4886241A · kind A · utility
70Cited by
18References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1987 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Sep 16, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid valve for use in elevated pressure and temperature conditions. Composition material wiper rings are provided in the packing bore between the packing follower and the packing box ring. The composition wiper rings have an inner diameter substantially the same as the valve stem diameter to inhibit the extrusion of packing material during sliding valve operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.