Title:
METHOD AND APPARATUS FOR VENTING GAS FROM LIQUID-CONVEYING CONDUIT
Document Type and Number:
WIPO Patent Application WO/2012/021572
Kind Code:
A3
Abstract:
A valve-venting method increases the durability of flow restrictors within gas venting valves used on large diameter water and sewer pipelines such that transient high pressure conditions that can cause rapid adiabatic heating of the discharging gases are prevented from causing flow erosion and debris wear induced by the high velocities and thermal softening of the valve components. The method utilizes wear resistant orifice inserts that are more conductive than the valve component to better distribute the heat, and dynamic surge control geometry to slow the heat flow and provide progressive water-hammering control during high pressure events.
Inventors:
LANG RUDOLPH J (US)
WITHERIDGE ANTHONY JOHN (US)
WITHERIDGE ANTHONY JOHN (US)
Application Number:
PCT/US2011/047171
Publication Date:
September 26, 2013
Filing Date:
August 10, 2011
Export Citation:
Assignee:
INTERNAT VALVE MFG L L C (US)
LANG RUDOLPH J (US)
WITHERIDGE ANTHONY JOHN (US)
LANG RUDOLPH J (US)
WITHERIDGE ANTHONY JOHN (US)
International Classes:
F16K24/04
Domestic Patent References:
| WO2009109871A1 | 2009-09-11 |
Foreign References:
| GB758283A | 1956-10-03 | |||
| US20030235638A1 | 2003-12-25 | |||
| US5511577A | 1996-04-30 | |||
| US20060214379A1 | 2006-09-28 |
Attorney, Agent or Firm:
SMITH, Gregory, M. (Harrold Allen & Dixon LLP,225 West Wacker Driv, Chicago IL, US)
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