Quarter turn rotatable flow control valve
US5524863A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jun 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86751
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotatable flow control valve mechanism is provided having a valve body having a valve chamber and straight through flow passages intersecting the valve chamber. A rotatable valve element, which may be of straight, spherical or tapered configuration, is positioned for rotation within the valve chamber and is sealed with respect to the valve body by sealing elements that surround the flow passages. The rotary valve element defines a straight through flowway that is aligned with the flow passages of the valve body in the fully open condition of the valve and permits unobstructed flow through the valve and, when the flowway has a dimension at least as great as the dimension of the flow passage, permits objects such as pigs and scrapers to pass through the valve. For flow controlling activity the rotary valve element defines flow controlling passages in the form of holes or contoured slots which intersect the flowway and the outer peripheral surface thereof and incorporates anti-cavitation and noise abatement trim. The ratio of flow control slot length to flowway diameter is in the range of from 2.0 to 1.0 to 4.0 to 1.0 and is determinative of valve diameter. The noise abatement and a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.