Pump Specific Speed Archives - Chemical Engineering Site https://chemicalengineeringsite.in/tag/pump-specific-speed/ For Chemical Engineers Sun, 24 Aug 2025 14:41:10 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 Pump Specific Speed Calculator https://chemicalengineeringsite.in/pump-specific-speed-calculator/ https://chemicalengineeringsite.in/pump-specific-speed-calculator/#respond Fri, 29 Aug 2025 12:00:00 +0000 https://chemicalengineeringsite.in/?p=3873 Pump Specific Speed Calculator Enter pump speed, flow rate, and head. Calculates metric nq and US Ns, with impeller type & application. Export to Excel with live formulas. Pump Speed rpm Flow Rate m³/sm³/hL/sgpm Total Head mft Calculate 📊 Export Excel Reset Copy Specific Speed (metric nq) – Specific Speed (US Ns) – Impeller Type […]

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Pump Specific Speed Calculator

Enter pump speed, flow rate, and head. Calculates metric nq and US Ns, with impeller type & application. Export to Excel with live formulas.

Specific Speed (metric nq)
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Specific Speed (US Ns)
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Impeller Type
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Typical Application
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Formula & unit notes
  • Metric: nq = n · sqrt(Q[m³/s]) / H[m]^(3/4)
  • US: Ns = n · sqrt(Q[gpm]) / H[ft]^(3/4)
  • Classification by metric nq (editable in Excel):
    • Radial: nq < 30 (high head, low flow)
    • Mixed: 30 ≤ nq < 80 (medium head/flow)
    • Axial: nq ≥ 80 (low head, very high flow)

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