Fire resistant seat for flow control valve
US4373543A · kind A · utility
9Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Jun 12, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1812
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flow control valve with a valve closure element is provided having at least one annular resilient seat member and an annular flexible metal seat member positioned adjacent to it. The flexible metal seat is held in position by heat resistant gaskets and is biased against the resilient seat member. Upon the failure of the resilient seat to seal because of melting or deterioration caused by exposure to heat, the flexible metal seat member springs into position to provide a fire and heat resistant metal-to-metal seal with the valve closure element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.