By American Water Works Association
"Operators, technicians, and engineers will locate the data during this guide invaluable for gaining a uncomplicated realizing of the use and alertness of air valves. A worthy consultant for choosing, sizing, finding, and fitting air valves in water functions, M51 presents info on air valve kinds indexed in AWWA ordinary C512, most recent variation, together with the subsequent: air-release valve; air/vacuum valve; and blend air valve."--BOOK JACKET.Title precis box supplied by way of Blackwell North the US, Inc. All Rights Reserved. Read more...
"Operators, technicians, and engineers will locate the data during this guide necessary for gaining a simple realizing of the use and alertness of air valves. A important consultant for choosing, sizing, finding, and fitting air valves in water functions, M51 offers info on air valve kinds indexed in AWWA usual C512, most recent version, together with the subsequent: air-release valve; air/vacuum valve; and blend air valve."--BOOK JACKET.Title precis box supplied through Blackwell North the United States, Inc. All Rights Reserved
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Inspection Air valves should be inspected at least annually for leakage, and the resilient seats should be replaced as necessary. --``,,,,``,``,`,`,````,,`,,````-`-`,,`,,`,`,,`--- Copyright American Water Works Association Provided by IHS under license with AWWA No reproduction or networking permitted without license from IHS Licensee=ATLATEC S A DE C V/5972499002 Not for Resale, 03/18/2009 15:20:15 MDT INSTALLATION, OPERATION, MAINTENANCE, AND SAFETY 31 SAFETY Underground Structures Hazardous gases collecting in underground structures have caused injuries and fatalities.
To protect air valves with large metal hoods covering the valve discharge opening from rodents and bird nests, a heavy screened cage covering the air valve outlet should be used. OPERATION AND MAINTENANCE The manufacturers' recommendations on air valve operation and maintenance should be followed. Continuously Operating Air Valves Air valves that operate continuously should be opened and flushed more often than valves used for filling and draining. All air valves should be opened and flushed at least annually.
O. 1994. Air In Pipe? Time to Review Air Valve Basics, OpfZow, AWWA Vol. 20-3, March. E. 1972. Locating and Sizing Air-Release Valves, Journal AWWA, July. , et al. 1989. Pumping Station Design, Butterworth-Heinemann, Boston. Theory, Application, and Sizing of A i r Valves 1997. Val-Matic Valve & Mfg. Corp. D. 1991. L. George Ltd. Tullis, J. Paul 1989. Hydraulics of Pipelines, John Wiley & Sons, New York. Wisner, Paul E. 1975. Removal of Air From Water Lines, Journal of the Hydraulics Division, ASCE, February.
Air-release, air/vacuum, and combination air valves by American Water Works Association