Fire safe seat for a valve
US4418889A · kind A · utility
14Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Mar 16, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1812
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A novel seat especially adapted for a butterfly valve is provided which is formed both of metal and "soft" material so as to furnish a "bubble tight" seal in normal operating conditions and a metal-to-metal seal in fire situations. The seat is uniquely constructed and is permanently deformed by the disc or closure member of the valve to form a precise size and configuration corresponding to the size and configuration of the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.