How to use:
To calculate a particular section, all previous ones need to be calculated first.
Otherwise, all sections can be calculated at once using the button at the end of the page.
If a value is changed, do not forget to re-calculate the section to update the results.
Inputs
Slurry Details
Solids Flow Rate tph
Liquids Flow Rate tph
Particle Size (d50) μm
Liquid Dyn. Viscosity cP
Liquid SG
Solids SG
Mixture SG
Concentration Converter Calc.
Suction Pipe Details
Pipe Material
Pipe Spec.
Pipe Nominal Size (DN)
Scale Thickness mm
Suction Static Head mSlurry
Suction Surface Pressure kPa
For Suction Static Head, up is positive and down is negative.
Pipe Length m
Inlet Coeff. Qty. = 1 K1
Valve Qty. = 1 K2
Reducer Qty. = 1 K3
45° Bend K4
90° Bend K5
Run Tee K6
Branch Tee K7
Other K8
Discharge Pipe Details
Pipe Material
Pipe Spec.
Pipe Nominal Size (DN)
Scale Thickness mm
Discharge Static Head mSlurry
Req. Delivery Pressure kPa
For Discharge Static Head, up is positive and down is negative.
Pipe Length m
Outlet Coeff. Qty. = 1 K1
Outlet Valves Qty. = 1 K2
Reducer Qty. = 1 K3
45° Bend K4
90° Bend K5
Run Tee K6
Branch Tee K7
Other K8
Pump Information / Duty Points
Pump Make
Pump Model
Pump Frame
Pump Drive Type
Shaft Seal Type
Impeller Type
Impeller Diameter mm
Pump Efficiency (Water) %
Pump Speed (Water) rpm
Pump Efficiency Calc. can be used to get values for HR and ER following "Weir Slurry Pumping Manual" A1-7 nomogram instead of the estimation made in this page. Values can then be replaced in the results section.

Pump information fields are only there to make printable reports clearer.
NPSH Data
Height Above Sea Level m
Fluid Service Temp. °C
NPSHr m
Power Requirements
Motor Selection Power kW
Drive Efficiency %
Power Margin %
Final maximum power represents the highest power with drive inefficiencies and power margin applied.
Results
Slurry Results
Flow Rate - m3/h
Weight Concentration - %
Volume Concentration - %
Slurry Viscosity - cP
Durand Factor -
Suction Pipe Results
Internal Diam. (w/scale) - mm
Velocity - m/s
Limiting Velocity - m/s
Relative Roughness -
Reynolds -
Friction Factor (Chen) -
Pipe Friction H. Loss - mSlurry
Fittings Friction H. Loss - mSlurry
Suction Head - mSlurry
Discharge Pipe Results
Internal Diam. (w/scale) - mm
Velocity - m/s
Limiting Velocity - m/s
Velocity Ratio (V/Vl) -
Relative Roughness -
Reynolds -
Friction Factor (Chen) -
Pipe Friction H. Loss - mSlurry
Fittings Friction H. Loss - mSlurry
Discharge Head - mSlurry
Pump Information / Duty Points Results
Impeller Tip Speed - m/s
Head Ratio (HR) %
Efficiency Ratio (ER) %
Duty Point:
Flowrate - m3/h
Discharge Head - mSlurry
Total Dynamic Head - mSlurry
Pump Efficiency (Slurry) - %
Duty Point Power (Slurry) - kW
Pump Efficiency (Water) - %
Duty Point Power (Water) - kW
NPSH Results
Barometric Pressure - mH2O
Vapour Pressure - mH2O
NPSHa - mSlurry
NPSHa (Water eq.) - mH2O
NPSHa > NPSHr -
Power Results
Duty Point Power (Slurry) - kW
Duty Point Power (Water) - kW
Final Max. Power - kW
% of Full Load - %
Only to check that results are in expected range:
Conservative Power (CP) - kW
Motor Power for CP - kW