Skip to main content

Control of Transient Induced Contaminant Leakage and Infiltration by Implementation of Air Valves

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Pressure transients wreak very extensive damages to water and wastewater transmission systems. Until recent years, most of the concern related to pressure transient damages was focused on the obvious extreme events of pipe burst or collapse that result in major spills or flooding. But, there are many damages, far more widespread and often more dangerous, that are less obvious and attract less attention. Pressure transients cause cracks and unseen small breaks in buried pipelines, pipe fittings, and accessories. They cause joints to fracture or to come apart, they cause damage to seals and gaskets or cause them to shift out of their sealing positions. These damages result in leakage and in contaminant intrusion and their consequent economic, environmental, and public health repercussions.

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

DOI: https://doi.org/10.2175/193864709793847140

Publication date: 2009-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more