Pump Viscosity Correction Checker
Hydraulic Institute B-parameter — does your viscous fluid de-rate the centrifugal pump?
Above ~300–500 cSt centrifugal efficiency collapses and gear/screw pumps win. The full HI method then gives C_Q, C_H, C_η correction factors.
Formula
Note: B assumes 2,900 rpm; the verdict bands are the standard screening thresholds, not a full correction.
Pump Viscosity Correction Checker is a free viscosity correction pump for pump engineers, plumbers and plant designers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Pump Viscosity Correction Checker
Hydraulic Institute B-parameter — does your viscous fluid de-rate the centrifugal pump? The calculation implements B = 16.5·ν^0.5·H^0.0625 / (Q^0.375·N^0.25) (ν cSt, H m, Q m³/h, N rpm) (ANSI/HI 9.6.7 — viscous performance correction). Above ~300–500 cSt centrifugal efficiency collapses and gear/screw pumps win. The full HI method then gives C_Q, C_H, C_η correction factors.
How to use Pump Viscosity Correction Checker
- 1Enter Viscosity at pumping temp in cSt.
- 2Enter Duty flow in m³/h.
- 3Enter Duty head per stage in m.
- 4Read HI parameter B instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Pump Viscosity Correction Checker?
- ✓Implements the standard formula — B = 16.5·ν^0.5·H^0.0625 / (Q^0.375·N^0.25) (ν cSt, H m, Q m³/h, N rpm)
- ✓Reference cited on-page: ANSI/HI 9.6.7 — viscous performance correction
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Built-in engineering verdict flags out-of-range results instantly
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Pump Viscosity Correction Checker use?+
It computes B = 16.5·ν^0.5·H^0.0625 / (Q^0.375·N^0.25) (ν cSt, H m, Q m³/h, N rpm), per ANSI/HI 9.6.7 — viscous performance correction. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Above ~300–500 cSt centrifugal efficiency collapses and gear/screw pumps win. The full HI method then gives C_Q, C_H, C_η correction factors. Note: B assumes 2,900 rpm; the verdict bands are the standard screening thresholds, not a full correction.
Can I use this for pump selection?+
Use it to establish the duty (flow, head, NPSH, power) and then pick a pump whose curve passes through that point near best efficiency. The tool gives you the engineering numbers a supplier will ask for.
Is the Pump Viscosity Correction Checker free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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