Recommendations
Pound forceFoot valveEstimated inertiaHead loss coefficient applicable to partially open diaphragm valveHydrofoil turbine floculatorNet Present Value (NPV)
Parmakian's curves
Default

Input data

Flow

Diameter

Celerity

Geometric disparity

Extension of the settlement line

Total head loss

Rotation

Inertia (kgf.m²)

Pump efficiency

Output data

ΔHb

ΔHm

ΔHb - hf

ΔHm - (hf/2)

Description

Given the basic characteristics of the pumping line da linha de recalque (interd diiameter, celerity, extension, geometric head), of the pumping equipment (rotation, inertia WR²) and of the permanent regime (flow, total head losses, pump efficiency), calculates the extreme transient heads at the pump installation and a the pumping line midway.

Parmakian curves

References

  • Parmakian, John. Waterhammer analysis. New York: Prentice, 1955.