Centrifugal Pump Sizing Calculator v6 Mobile

Mobile-friendly layout using the same v6 math: Mission Table 24 lookup/interpolation, Mission Table 25 equivalent-feet fittings, and water vapor pressure lookup by temperature.

Print 8.5×11Export PDF

View ResultsTop

General Inputs

Liquid pumped Flow rate (GPM) Specific gravity Temperature (°F) Atmospheric pressure (psia) Water vapor pressure from table (ft water) C factor 13012011010090807060 Apply new pipe ×0.70? NoYes Discharge pressure required (psig)

Suction Inputs

Suction pipe size (in) 1.522.534568101214161820 Fluid surface above pump CL (ft) Straight suction pipe (ft)

Fitting Quantities

90° elbows qty Tee running qty Tee branched qty Swing checks qty Globe valves qty Butterfly valves qty

Discharge Inputs

Discharge pipe size (in) 1.522.534568101214161820 Vertical distance to high point (ft) Straight discharge pipe (ft)

Fitting Quantities

90° elbows qty Tee running qty Tee branched qty Swing checks qty Globe valves qty Butterfly valves qty

Calculated Outputs

Required pump discharge head / TDH

NPSHa

Total friction head Hf

Show detailed calculations

Suction Table 24 F, ft/100 ft

Discharge Table 24 F, ft/100 ft

Suction fitting equivalent ft

Discharge fitting equivalent ft

Suction total equivalent ft

Discharge total equivalent ft

Suction friction Hfs, ft

Discharge friction, ft

Total friction head Hf, ft

Elevation head He, ft

Discharge pressure head, ft

Required pump discharge head / TDH, ft

Atmospheric head Ha, ft

Static suction head Hst, ft

Vapor pressure head Hvp, ft of pumped liquid

NPSHa, flooded suction convention, ft

Mission flooded-suction formula: NPSHa = Ha + Hst - Hvp - Hfs. Water vapor pressure is looked up from the table by temperature and converted from ft water to ft of pumped liquid by dividing by specific gravity.

Calculation Basis

Friction head = total equivalent ft / 100 × Mission Table 24 F × C correction multiplier × optional new-pipe multiplier. Table 24 is for C = 100. Values between listed GPM rows are linearly interpolated. Water vapor pressure uses the Properties of Water table from 40°F to 180°F, linearly interpolated between rows.

TDH

NPSHa

Friction