Method and apparatus for venting gas from liquid-conveying conduit
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United States of America Patent
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Issued Date -
Feb 16, 2012
app pub date -
Aug 12, 2010
filing date -
Aug 12, 2010
priority date (Note) -
Abandoned
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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.
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