Air-Release, Air/Vacuum & Combination Air Valves by American Water Works Association

By American Water Works Association

This handbook publications operators within the choice, install, and upkeep of air valves in consuming water provide purposes. assurance comprises air valve varieties, valve place, valve orifice sizing, water hammer, set up, operation, protection, and upkeep.

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Extra resources for Air-Release, Air/Vacuum & Combination Air Valves

Example text

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.

All air valves should be opened and flushed at least annually. Filling and Draining Pipelines Caution is required when filling or draining pipelines that have aidvacuum or combination air valves installed on the pipeline; see chapter 5. Never prop the valve open by inserting objects into the valve venting port. This can damage the valve seat, and the object may fall into the valve. Inspection Air valves should be inspected at least annually for leakage, and the resilient seats should be replaced as necessary.

Wisner, Paul E. 1975. Removal of Air From Water Lines, Journal of the Hydraulics Division, ASCE, February. J. Surge Reference Manual, Department of Civil Engineering, University of Kentucky, latest edition. AWWA M11. 1989. 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 (1st edition), Denver, Colo. Colorado State University. 1977. Concepts of Water Hammer & Air Entrapment in the Filling & Testing of Pipelines.

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