Download e-book for iPad: Air-Release, Air/Vacuum and Combination Air Valves by AWWA


ISBN-10: 1583211527

ISBN-13: 9781583211526

ISBN-10: 1615838201

ISBN-13: 9781615838202

Operators, technicians, and engineers will locate the knowledge during this guide precious for gaining a simple figuring out of the use and alertness of air valves. this can be a worthwhile consultant for choosing, sizing, finding, and fitting air valves in ingesting water offer functions. assurance contains air valve varieties, valve position, valve orifice sizing, water hammer, install, operation, security, and upkeep.

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

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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.

Well pumps. See Deep-well pumps, Vertical turbine pumps This page has been reformatted by Knovel to provide easier navigation.

Freezing Suitable insulation and electrical heat tape should be provided in areas prone to freezing. Frozen air valves will not operate and can be damaged. Thermally activated relief valves (typically supplied in 3/8 or '/2 in. 19 mm or 13 mml diameter) can be installed on the valve body t o release water and reduce the possibility of damage from freezing. The relief valve automatically opens when the water temperature in the valve falls below a set point (typically 35°F [ Z O C l ) and recloses at higher temperatures.

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Air-Release, Air/Vacuum and Combination Air Valves by AWWA

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