Replaceable adjustable butterfly valve seat
US4281818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1980 |
| Grant date | Aug 4, 1981 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/2263
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention concerns a butterfly valve having a resilient, adjustable body seat for the pivoting disc. The seat comprises a T-shaped elastomeric ring which is confined at one end by the transverse wall of an annular groove in the valve body and that another end by a clamping ring which slides along the wall of the flow passage extending through the body. The clamping ring is forced against the seat ring by a plurality of individual screw actuators spaced around its circumference and therefore selected portions of the seat ring can be compressed as needed to produce a leak-free seal around the entire periphery of the pivoting disc. The T-shaped elastomeric ring is held in place solely by mechanical forces in order to permit removal, maintenance, and replacement thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.