By American Water Works Association
This handbook courses operators within the choice, install, and upkeep of air valves in ingesting water provide functions. insurance comprises air valve kinds, valve position, valve orifice sizing, water hammer, deploy, operation, defense, and upkeep.
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Extra resources for Air-Release, Air/Vacuum & Combination Air Valves
Fluid Mechanics and Hydraulics, (2nd edition) McGraw Hill, New York. Karassik, Igor J. et al. 1986. Pump Handbook, 2nd edition. McGraw Hill, New York. 33 Copyright (C) 2001 American Water Works Association All Rights Reserved INDEX Note: f. indicates figure; t. indicates table. Index Terms Links A Air entry into pipelines 2 in water 1 Air pockets 1 Air valves 1 See also Air-release valves, Air/ vacuum valves, Combination air valves aboveground 28 belowground 28 bolting material 28 and contamination 30 continuously operating 30 and decreased upslope 9 and deep-well pumps 9 depth of burial 30 and filling and draining pipelines 30 and flooding 30 and freezing 30 at high points 8 19 8f.
Inspection When inspecting air valves, isolate the valve by closing the shutoff valve before putting hands and fingers into the valve outlet. If the air valve should suddenly close, hands or fingers could be injured or lost. Pressurized air can also be trapped between the shutoff valve and the air valve; therefore, any removal of air valve bolts, plugs, or covers must be done with extreme care to release trapped air slowly and prevent serious injury. Pipe1ine Fi I I ing Thread protectors and packing material should be removed from air valves prior to filling the pipeline.
17f. 15f. 15t. 19f. 20f. 18f. P Pipelines air pockets 1 sources of air entry 2 valve locations 7 and water hammer 8f. 25 S Small orifice valves. See Air-release valves V Valve vaults Vertical turbine pumps 29 29f. 9 24 W Water hammer 23 and air/vacuum valves 23 and combination air valves 23 in pipelines 25 and well pumps 24 24f. Well pumps. See Deep-well pumps, Vertical turbine pumps This page has been reformatted by Knovel to provide easier navigation.