Result
Margin (NPSHa - NPSHr)
18.17 m
NPSHa
22.17 m
Formula
Calculation logicLearn
How to use this result.
Keep >=1 m margin or redesign suction.
Verify before relying.
- Confirm units match the input labels before trusting the result.
Related calculators
Pumps
Pump Affinity Laws
Affinity laws: Q2=Q1(N2/N1), H2=H1(N2/N1)^2, P2=P1(N2/N1)^3.
Open calculatorPumps
Pump Duty Point Solver
Pump-system curve intersection, closed form.
Open calculatorPumps
Pump Head and Power
Hydraulic power Ph = rho*Q*H/366972. Shaft = Ph/eff. Motor with 15% margin.
Open calculatorPumps
Pump Parallel / Series Compare
Parallel Q adds at same H; series H adds at same Q. Screening before curve intersection.
Open calculatorWorkspace
Keep the assumptions with the result.
Save this calculation to return to the inputs, result, and report from your private workspace.
Sign in or create an account to save this calculation.