Pipe and Tube System Components - Minor (Dynamic) Loss Coefficients

Calculate minor or dynamic pressure loss in pipe and tube system components using the formula: Δpminor_loss = ξ ρf v² / 2

Type of Component or FittingMinor Loss Coefficient (ξ)
Tee, Flanged, Dividing Line Flow0.2
Tee, Threaded, Dividing Line Flow0.9
Tee, Flanged, Dividing Branched Flow1
Tee, Threaded, Dividing Branch Flow2
Union, Threaded0.08
Elbow, Flanged Regular 90°0.3
Elbow, Threaded Regular 90°1.5
Elbow, Threaded Regular 45°0.4
Elbow, Flanged Long Radius 90°0.2
Elbow, Threaded Long Radius 90°0.7
Elbow, Flanged Long Radius 45°0.2
Return Bend, Flanged 180°0.2
Return Bend, Threaded 180°1.5
Globe Valve, Fully Open10
Angle Valve, Fully Open2
Gate Valve, Fully Open0.15
Gate Valve, 1/4 Closed0.26
Gate Valve, 1/2 Closed2.1
Gate Valve, 3/4 Closed17
Swing Check Valve, Forward Flow2
Ball Valve, Fully Open0.05
Ball Valve, 1/3 Closed5.5
Ball Valve, 2/3 Closed200
Diaphragm Valve, Open2.3
Diaphragm Valve, Half Open4.3
Diaphragm Valve, 1/4 Open21
Water meter7
Calculator

Inputs

Results

Minor Pressure Loss (Δpminor_loss)-- Pa
Minor Pressure Loss (Δpminor_loss)-- kPa
Pipe and Tube System Components - Minor (Dynamic) Loss Coefficients | MEPKit Engineering Tools | MEPKit