Minor Loss Calculation for Liquids and Gases

Minor loss due to fittings in pipes and open channels

Minor loss calculation is mobile-device-friendly as of July 29, 2014

 Select units: Use feet and seconds units Use meters and seconds units Minor Loss Coefficient, K: © 2014 LMNO Engineering, Velocity, V (ft/s): Research, and Software, Ltd. Minor Loss, hm (ft): http://www.LMNOeng.com

Units in minor loss calculator: ft=foot, m=meter, s=second.

Minor Loss Equation:

g = acceleration due to gravity = 32.174 ft/s2 = 9.806 m/s2.

hm = head loss due to a fitting and has units of ft or m of fluid. It is the energy loss due to a fitting per unit weight of fluid.

K = minor loss coefficient for valves, bends, tees, and other fittings - table of minor loss coefficients.

The minor loss calculation is valid for open channels (including partially full culverts) as well as closed conduits (circular or non-circular) flowing full. The minor loss calculation does not check for unreasonable inputs such as negative values. All values should be entered as positive.

LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd.   Athens, Ohio 45701  USA   Phone and fax: (740) 592-1890
LMNO@LMNOeng.com    http://www.LMNOeng.com

August 25, 2015: Made text fields narrower to show 8 significant figures rather than 16. Calculation still uses double precision internally.

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Minor Loss Coefficients (K)

Q=VA simple flowrate calculation

Unit Conversions

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