Ball valve having a non-integral upstream seat and at least one integral downstream seat
US6065736A · kind A · utility
Inventor
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4442
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball valve for controlling the flow of a fluid is provided having primary and secondary annular sealing seats which are disposed in the body cavity for the purpose of providing a seal between the valve body and a first hemisphere of a ball. An annular leak detection channel is defined between the primary and secondary annular sealing seat for collecting fluid that leaks past the primary sealing seat. A purge is defined in the valve body extending from the channel to the exterior of the valve body, for establishing fluid through-flow and for draining fluid away from the secondary sealing seat that collects in the channel. A third annular sealing seat sealingly engages a second hemisphere of the ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.