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Read e-book online Butterfly Valves - Torque, Head Loss, and Cavitation PDF

ISBN-10: 1583210415

ISBN-13: 9781583210413

ISBN-10: 1615837949

ISBN-13: 9781615837946

This guide offers information for utilizing the flexible butterfly valve in waterworks carrier. insurance contains tactics for calculating working torque, head loss, and cavitation. additionally incorporated are advised equipment for selecting actuator sizes, averting valve failure as a result of inner forces produced via water circulate and strain, decreasing noise, and fighting harmful vibrations.

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Extra resources for Butterfly Valves - Torque, Head Loss, and Cavitation Analysis

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1993. Using Coefficients to Predict Dynamic Flow Torque for Quarter-Turn Valves. Journal AWWA 85:8 (August). , et al. 1989. Pumping Station &sign. Boston: ButterworthHeinemann. Sarpkaya, Turgut. 1961. Torque and Cavitation Characteristics of Butterfly Valves. Journal of Applied Mechanics 28 (December): 511418. E. Vivian. An Zntroductory Guide to Value Selection. London: MEP Limited. Tullis, J. Paul. 1989. Hydraulics of Pipelines. New York John Wiley & Sons. Tullis, J. M. Skinner. 1968. Reducing Cavitation in Valves.

The valve installation can also be affected by the actuator configuration. Conditions may favor orienting the handwheel or operating nut in a specific direction. If the desired actuator orientation does not match the required flow orientation, then the valve manufacturer should be consulted. Upstream Elbow or Branch Tee Elbows and branch tees cause asymmetrical flow velocity in the pipe (Figure 6-2) which affects butterfly valve operation. A length of straight pipe between the fitting and the valve equal to 8 times the pipe diameter is normally sufficient to provide normal flow through the valve.

E Energy calculations (annual cost) 25 F Flow coefficient (Cv ) 23 disturbances 5 resistance coefficient (Kv ) 24 This page has been reformatted by Knovel to provide easier navigation. ) throttling 43 turbulence 3 velocity 3 Flow testing basic system 34 and cavitation 3 and head loss 2 procedure 34 requirements 33 and torque 34f. 2 Free discharge installations 3 3f. 1 23 42 H Head loss and energy calculations (annual cost) 25 flow coefficient (Cv) 23 flow resistance coefficient (Kv) 24 and flow testing 2 formula 24 qualifications to calculation methodology 24 reason for calculating Head sources Hydrostatic torque 2 6 7f.

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Butterfly Valves - Torque, Head Loss, and Cavitation Analysis


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