Visbreaker letdown valve
US4383553A · kind A · utility
20Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Oct 19, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86815
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A visbreaker, letdown valve is featured which maintains a smooth flow of furnace effluent. Liquid passing through the throat of the valve is throttled, and a portion is caused to flash to vapor. The valve is designed to allow for subsonic flow of the vapor under all process conditions. A quenching fluid is also added to the liquid passing through the throat in order to cool the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.