By American Water Works Association
"Operators, technicians, and engineers will locate the knowledge during this guide valuable for gaining a easy figuring out of the use and alertness of air valves. A useful advisor for choosing, sizing, finding, and fitting air valves in water functions, M51 offers info on air valve forms indexed in AWWA usual C512, most up-to-date variation, together with the subsequent: air-release valve; air/vacuum valve; and blend air valve."--BOOK JACKET.Title precis box supplied by means of Blackwell North the United States, Inc. All Rights Reserved. Read more...
"Operators, technicians, and engineers will locate the data during this guide helpful for gaining a easy figuring out of the use and alertness of air valves. A worthwhile consultant for choosing, sizing, finding, and fitting air valves in water purposes, M51 offers info on air valve varieties indexed in AWWA commonplace C512, most up-to-date variation, together with the subsequent: air-release valve; air/vacuum valve; and mixture air valve."--BOOK JACKET.Title precis box supplied through Blackwell North the USA, Inc. All Rights Reserved
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Additional resources for Air-release, air/vacuum, and combination air valves
These special devices, manufactured for vertical turbine and deep-well pump installations, generally regulate the exhaust rate and closure speed of the airhacuum valve. It is important to note that the slowclosing and dampening devices are effective in suppressing water hammer only when placed near the pump. Figure 5-1 shows the proper location of an airhacuum valve with slow-closing device. Air-release valves can be used with time-delayed, power-actuated pump discharge control valves to release air in the pump column slowly under full pump pressure before the control check valve opens.
Air/vacuum valves, 3-4,4f. , 17f, 18f. Combination air valves, 5, 5f. , 22 vault installation, 29f. and water hammer, 23-24 Deep-well pumps, 9, 19, 24,24f. Head loss, 1-2 Henry’s law, 1 Orifice sizing air capacity table for air-release orifices, 12t. discharge of air through small orifice, 13f. , 18f. , 15t. , 20f. Pipelines air pockets, 1-2 sources of air entry, 2 valve locations, 7-10, 8f. and water hammer, 25 Small orifice valves. See Air-release valves Valve vaults, 29, 29f. Vertical turbine pumps, 9, 24 Water hammer, 23 and airlvacuum valves, 23-24 and combination air valves, 23-24 in pipelines, 25 and well pumps, 24,24f.
Steel Pipe-A Guide for Design and Installation, 3rd edition. Denver, Colo. AWWA Standard for Air-Release, AirNacuum and Combination Air Valves for Waterworks Service, AWWA C512-92 (latest edition), Denver, Colo. Colorado State University. 1977. Concepts of Water Hammer & Air Entrapment in the Filling & Testing of Pipelines. Fort Collins, Colo. Dean, John A. 1992. Lange’s Handbook of Chemistry. McGraw Hill, New York. Edmunds, Robert C. 1979. Air Binding in Pipes, Journal AWWA, May, 1979. flow of Fluids.