Open Menu

Loss Coefficient for Expansion Fitting (Diffusor)
Copyright 2003 - Peter R. Stech
Enter Data and click on "Calculate" button.

 Move Mouse over text to view sketch of Diffusor 

Data Input

 Result

Project:        
Prepared by: 

Date Prepared:

Calculator Result Click here to see the calculator  

 Need a Calculator to determine input? Click on 
Calculator Icon in the Box to the left. Calculate the 
new Value, copy and paste into the desired cells!
The head loss is based on fluid velocity in the smaller diameter section of the sharp edged diffusor . Diameter Ratio d/D -

Diameter d 

inch or mm Area Ratio d2/D2

-
Diameter D 

inch or mm Friction Coefficient

-

Angle α

Degrees Diffusor Lenght L

inch or mm
Friction Coefficients vary largely. The data presented here provides good average data. Fabrication methods (welds, radii, etc) may effect the calculated values.