Valve construction for sand and slurry service
US4354663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Mar 3, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K3/0209
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gate valve is provided having a recess formed in the upstream portion of the gate and in intersecting relation with the gate port. The gate recess cooperates with a registering recess formed in the downstream portion of the upstream seat to develop a large flow passage as compared to a small flow passage defined by the interrelationship of the gate port with the downstream seat. Fluid laden with erosive material will flow through the larger dimension gate/seat opening between the gate and upstream seat at low velocity, as compared to high velocity flow through the opening defined between the gate and the downstream seat. This low velocity flow, impinging upon the downstream seat, results in minimized erosion of the downstream seat during opening and closing movement of the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.