Low friction live-loaded packing
US8622367B2 · kind B2 · utility
6Cited by
42References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2011 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | May 12, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6069
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve packing assembly for a control valve includes a seal assembly, a loading assembly, and a packing retainer. The seal assembly has a seal component to provide a fluid seal around a valve stem and an anti-extrusion component to substantially prevent extrusion of the seal component about the valve stem. The loading assembly is configured to advantageously provide a predetermined packing stress to the seal assembly that is in the same direction as a process stress applied to the seal assembly by a process fluid, thereby substantially reducing packing friction and packing wear in the control valve assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.