Valve body-bonnet joint
US4098490A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Mar 2, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K27/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flange joint for a valve body and the associated bonnet has a planar flange sealing surface around the body opening and a mating flange around the bonnet. The valve body flange has a raised portion around an inner portion extending above a planar sealing surface. The bonnet flange has a substantially rigid outer portion and a deflectable inner portion with a planar flange sealing surface on the exposed side thereof. The deflectable portion contacts the body flange raised portion in sealing contact and is deflected as the flange sealing surfaces are brought together by fasteners. The bonnet member deflectable portion maintains a seal around the valve body flange in the event the fasteners relax under high temperature conditions or high pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.