Suction specific speed (US)Toggle
- This calculator can be used to determine a centrifugal pump's suction specific speed (Nss) for a given flow rate (Q), suction head required (NPSHr), rotational speed (N). If you enter any three of these variables as inputs, the calculator will determine the fourth variable.
- Flow value is taken at the best efficiency point.
- Flow value is 1/2 best efficiency point flow for double suction impellers.
- NPSHr value is taken at the best efficiency point.