Distribution valves : selection, installation, field by American Water Works Association

By American Water Works Association

Up to date from the 1996 edtion, this operations guide offers functional details on determining, fitting, box trying out, and conserving distribution valves in potable water structures. It covers the main ordinary values together with globe, butterfly, plug, ball, cone, gate and payment. Unloading, inspection, garage, deploy, trying out, upkeep, and record-keeping are defined intimately besides the heritage and idea. This handbook can be rather usefeul for small and medium sized companies.

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Sample text

INSPECTION BEFORE INSTALLATION ________________________ At the job site, installers should establish a step-by-step routine to ensure that valves are properly inspected before they are installed. The routine should include the following steps: 1. Determine the direction of flow in the line to ensure proper installation. Some valves are not bidirectional. Direction of flow is critical when swing check valves are being installed. Swing check valves can be mounted with flow in the upward (vertical) flow direction (never the downward flow direction); however, with lever and weight valve styles, the configuration of the weights must assist in closing the valve.

MINIMUM TENSILE STRENGTH 207 Mpa (30,000 psi) The Public Water Utility ENGINEERING STANDARD DETAIL DRAWING DATE DRAWN BY SCALE VALVE BONNET DESIGN DATE DATE CHECKED SENIOR ENGINEER Courtesy: DATE APPROVED CHIEF ENGINEER DWC: 60-016 Kanwal Oberoi Figure 4–6 Drawing of a typical valve bonnet Copyright American Water Works Association Provided by IHS under license with AWWA No reproduction or networking permitted without license from IHS Licensee=ATLATEC S A DE C V/5972499002, User=Yañez, Simon Not for Resale, 02/13/2009 14:28:35 MST REVISION 0 --`,,,,`,`,,`,,,,`,,`,,`,`,``,,`-`-`,,`,,`,`,,`--- LUC INSTALLATION Cast-Iron Cover Pavement Concrete Block 2-in.

9 PER 100mm 25mm 181mm 110mm 120mm 140mm 165mm ELEVATION CROSS SECTION A - A DESIGN SPECIFICATIONS: TOLERANCES OF ± 3mm ALLOWED FOR CASTING DIMENSIONS OF 25mm OR LESS. TOLERANCES OF ± 6mm ALLOWED FOR CASTING DIMENSIONS IN EXCESS OF 25mm. ALL CASTINGS TO BE IN ACCORDANCE WITH ASTM A48. 5mm TOP OF VALVE NUT 300mm 5mm DETAIL B 32mm 19mm 10mm 8m 8mm 14mm 8mm 168mm 27mm CROSS SECTION A - A DESIGN SPECIFICATIONS: TOLERANCES OF ± 3mm ALLOWED FOR CASTING DIMENSIONS OF 25mm OR LESS. TOLERANCES OF ± 6mm ALLOWED FOR CASTING DIMENSIONS IN EXCESS OF 25mm.

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