EngiRef / Fluids Engineering Formula

Minor Head Loss

Minor Head Loss: Head loss through fittings and valves. A Pipe Flow formula in fluids engineering. Variables hₘ, K, v and g, each with SI and imperial units.

Pipe Flow

Specification

Name
Minor Head Loss
Discipline
fluids
Category
Pipe Flow
LaTeX
h_m = K \frac{v^2}{2g}
Description
Head loss through fittings and valves
Conditions
K depends on fitting type
Can solve for
hₘ, K, v
Tags
minor, loss, fitting, valve, elbow

Variables

Variables for Minor Head Loss
SymbolNameUnitSi UnitImperial Unit
hₘMinor Head Lossmmft
KLoss Coefficient - - -
vVelocitym/sm/sft/s
gGravitym/s²m/s² -

Common questions

What is the Minor Head Loss formula?
Head loss through fittings and valves. It sits under Pipe Flow, Fluids engineering in the EngiRef reference.
What do the symbols in the Minor Head Loss formula mean?
In Minor Head Loss, hₘ is minor head loss in m; K is loss coefficient; v is velocity in m/s; g is gravity in m/s².
When does the Minor Head Loss formula apply?
Minor Head Loss holds under this condition: K depends on fitting type.