Ported slide gate valve with gate motion to break scale build up
US6681790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Sep 17, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0402
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ported slide gate valve having a gate for regulating the flow of a fluid through the valve, a seat located in the valve interior, and a means for causing the gate to move in such a manner that the gate fractures any scale built up in the lower portion of the valve interior, prior to the gate's movement to a valve closed position. The scale is fractured in a direction away from the seat and deposited in the fluid. More particularly, the means for causing the gate to move includes a primary piston and a secondary piston, where the primary piston is coupled to the gate. In the valve closed position, the secondary piston holds the primary piston in the desired position. A movement of the secondary piston causes the gate to move to fracture the scale in the lower portion of the valve interior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.