Testing valve assemblies
US6675110B2 · kind B2 · utility
32Cited by
46References
38Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2002 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jan 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2584
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of determining flow through a valve includes determining a first differential pressure across the valve. The valve is bypassed and a second differential pressure is determined across the valve. A flow decision is determined for the valve based on comparison of the first and second differential pressures. A method of testing a relief valve in a reduced pressure backflow preventer assembly includes determining a first differential pressure across an upstream check valve during a no flow condition. The upstream check valve is bypassed for the purpose of opening a relief valve, and a zone vent is opened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.