Selecting Centrifugal Pumps

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Approximate average roughness height k for pipes .................. 0. Tab. 4: Inside diameter d and wall thickness s in mm and weight of typical commercial steel pipes and their water content........... 0. Tab. 5: Loss coefficients ζ for various types of valves and fittings ........ Tab. 6: Loss coefficients ζ in elbows and bends .

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