Pump Engineering Tools
Free technical calculators to size and diagnose pumping systems — validated physics (IAPWS, ISA, Hydraulic Institute, ASTM, Darcy-Weisbach) crossed with the real range of FB Bombas pumps.
Four calculators, one standard of rigor
Each tool uses standard and handbook formulas, tested case by case, showing the result in real time. Where a pump datum is missing, FB engineering steps in.
NPSH Calculator
NPSH available and margin against cavitation by the Hydraulic Institute criterion, crossed with the real NPSHr of FBCN pumps.
Open calculatorHead Loss Calculator
Pipe head loss by Darcy-Weisbach and Hazen-Williams, with FB recommended-velocity alert.
Open calculatorPump Power Calculator
Shaft power (BHP) and suggested motor from flow, head and the real efficiency of the FBCN series.
Open calculatorViscosity Converter
cSt ↔ SSU ↔ cP conversion by the canonical ASTM D2161 form — essential for FBE gear pumps.
Open calculatorThe sizing workflow, in engineering order
1. Head loss
Establish the total dynamic head: pipe length, fittings and elevation define what the pump must overcome.
Head Loss Calculator2. NPSH available
With suction defined, check the cavitation margin — the most expensive mistake to fix after installation.
NPSH Calculator3. Shaft power
Flow, head and efficiency close the BHP and the suggested commercial motor for the duty point.
Pump Power Calculator4. Viscosity correction
Viscous fluid? Convert cSt ↔ SSU ↔ cP before selecting — viscosity shifts the curve and may change the indicated series.
Viscosity Converter
Why use the FB tools
No other calculator crosses the universal physics of pumping with a manufacturer’s real envelope. Here, each result is checked against the flow, head, power and NPSHr range of FB Bombas pumps — so you move from calculation straight to selection. Formulas follow standards (Hydraulic Institute ANSI/HI 9.6.1, ASTM D2161, Crane TP-410, Darcy-Weisbach and Hazen-Williams) and each was tested against known cases. And at the end of every calculation, the full memo goes by WhatsApp to FB engineering — from the number to the official data sheet, without retyping anything.
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