Contents - Index


Minor Losses (Resistance Coefficients) and Flow Measurement

Flow Measurement



Minor Losses
Minor losses refers to the head loss (or pressure losses) occuring in typical piping systems due to steady-state flow through piping components such as  fittings, valves, bends, elbows, tees, inlets, outlets, etc.  The head loss caused by flow through these components can be represented with a dimensionless resistance coefficient, K, defined as:







where DP is the pressure loss introduced by the piping component, r is the density, and g is gravitational acceleration.

This library file provides the values of resistance coefficients for the  pipe components and other situations shown below.  Click on a picture to obtain information for that component.


Expansions
                

Contractions
             

Inlets
        

Exits
       

Bends and Elbows
               

Valves
               

Tees