Packing ring cartridge with adjusting screws
US4468039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1983 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Dec 5, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/186
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure energizable packing assembly (47) for sealing the stem and valve body of a high pressure valve. The assembly comprises one or more sets (60, 61) of packing rings (62) which are adapted to be compressed between a pair of retainer rings (64, 65) and radially expanded into sealing engagement with the valve stem (45) and valve body (11). The retainer rings are actuated by Belleville springs (70) in a preloaded condition of the assembly and additionally by fluid pressure in the valve body after installation. The packing assembly includes an adapter ring plug (71) for accommodating its connection in the valve body. The packing assembly is assembled as a cartridge and held together by screws (77) which extend through the adapter ring (71), the outer retainer ring (64), the packing ring sets (60, 61) and their separating spacer ring (63), and which are anchored in the inner retainer ring (65). The screws can be adjustably tightened to place the cartridge in a desired preloaded condition after installation in a packing chamber (46a, 46b). The packing assembly is adapted for use as a cartridge in packing chambers without concern for the effect of tolerance "stack-up" in the axial …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.