Valve seat insert
US4114856A · kind A · utility
16Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1977 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Mar 7, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/2285
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve seat insert is disclosed which is useful in a butterfly valve of the type disclosed and claimed in U.S. Pat. No. 3,608,861. In such valves, disc and sealing ring contact pressure is enhanced by fluid pressure in the fluid line regardless of the direction of fluid pressure. The valve seat mechanism provides a fulcrum to control deflection of the seat ring when the seat is pressurized from the stem side, and also, by means of an insert with a locking ridge, limits undesirable inward radial movement of the seat ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.