By American Water Works Association

This operations handbook presents info at the layout, choice, install, trying out, and upkeep of distribution valves utilized in potable water platforms. All established water distribution valves are defined and illustrated intimately, together with globe, butterfly, plug, ball, cone, gate, and money valves. The handbook describes industry-approved practices for delivery, inspection, garage, set up, checking out, and upkeep of distribution valves and contains pattern upkeep list types, word list, and bibliography.

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Additional resources for Distribution Valves - Selection, Installation, Field Testing, and Maintenance

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E Emergency response planning 54 actions after an incident 54 actions during an incident 54 and isolation valves 53 and maintenance program 53 post-incident review 55 prioritizing levels of service 54 54 F Flanged valves 36 bolt-tightening method Flow control elements and actuators 36 36f. 3 4f. 23 types 4 Flow regulation methods Flow resistance 10 3 Friction and pipe diameter 3 factors 3 Friction loss 3 G Gate valves 16 double-disc resilient-seated solid-wedge 18f. 17 18f. 19 19 This page has been reformatted by Knovel to provide easier navigation.

1983. Maintaining Distribution System Valves. Jour. AWWA, 83(75):556-8. L. 2004. Valve Handbook. : New York. W. 1991. Valve Selection Handbook. : Houston, Texas. 57 Copyright (C) 2006 American Water Works Association All Rights Reserved INDEX NOTE: f. indicates a figure. Index Terms Links A Actuators 23 electric 23 and ground boxes or vaults 35 hydraulic and pneumatic 23 Air release valves 24f. 20 large-orifice 20 small-orifice 20 Altitude valves 21 American National Standards Institute (ANSI) 27 American Society of Mechanical Engineers (ASME) 27 American Water Works Association (AWWA) 27 B Ball valves 14 15f.

To 8 in. a high hardness rubber may be tried. Anytime the valve is dismantled, it is recommended that the piston, liner, and seat crown machined surfaces be sanded shiny with a fine emery cloth. This will prolong seal life significantly. A light film of water proof grease or petroleum jelly should be applied to the leather seals and sliding surfaces. Periodic inspection of the valve is suggested so that repairs can be anticipated before a malfunction occurs and a system becomes overpressurized.

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Distribution Valves - Selection, Installation, Field by American Water Works Association
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