Control of Transient Induced Contaminant Leakage and Infiltration by Implementation of Air Valves
Municipal and industrial wastewater leaking from transmission pipeline and force main systems damaged by pressure transients infiltrate, pollute, and contaminate ground and surface water, soil and the environment in which they pass, becoming dangerous health and environmental hazards and nuisances, spreading odor and providing havens for mosquitoes, flies, and other disease spreading insects. Water and soil polluted and contaminated by leaking wastewater can bring to pathogen and toxin intrusion into drinking water systems.
All these repercussions of pressure transients have come, more and more, into the limelight in the past few years, and great efforts are being made to control them.
The advantages of air valves as efficient and cost effective tools for the control of both, pressure transients, and their dangerous consequences, are often overlooked or unfamiliar. Modern, well designed, often innovative air valves, with the help of modern design tools, such as air valve sizing, location, and specification software and advanced transient analysis software, can control and dampen transients and eliminate or limit their damages.
Keywords: Air valve; air release valve; air vacuum valve; cavitational hammer; contaminant infiltration; contamination; down-surge; gap; leak; leakage; pathogen intrusion; pollution; pressure transients; surge; upsurge; vaporous cavitation; wastewater
Document Type: Research Article
Publication date: 01 January 2009
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