Contents


Frictional Losses, Flow Measurement and Minor Losses (Resistance Coefficients), 

Frictional Losses
              


Flow Measurement
        


Minor Losses
Minor losses refers to the head loss (or pressure losses) occurring 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:







and 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
                     

Supply and Extract Branches
Supply Duct - Branch
 
Supply Duct - Main

Supply Duct - Tee

Extract Duct - Branch

Extract Duct - Main
 
Extract Duct - Tee


Valves
               

Dampers
    

Tees