Pump Archives - Chemical Engineering Site https://chemicalengineeringsite.in/tag/pump/ For Chemical Engineers Tue, 16 Sep 2025 14:19:26 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 Centrifugal Pump Affinity Law Calculator https://chemicalengineeringsite.in/centrifugal-pump-affinity-law-calculator/ Tue, 16 Sep 2025 14:08:55 +0000 https://chemicalengineeringsite.in/?p=4065 Pump Affinity Law Calculator — chemicalengineeringsite.in Pump Affinity Law Calculator Select Input Mode (Speed or Diameter change). Enter baseline point. Calculates new Q₂, H₂, P₂. Export to Excel with live formulas. Input Mode Speed Change Diameter Change Baseline Speed n₁ rpm Baseline Impeller Dia D₁ mmcmminch Baseline Flow Q₁ m³/sm³/hL/sgpm Baseline Head H₁ mft Baseline […]

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Pump Affinity Law Calculator

Select Input Mode (Speed or Diameter change). Enter baseline point. Calculates new Q₂, H₂, P₂. Export to Excel with live formulas.

Input Mode
Mode
Speed Change
Ratio used (r)
–
New Flow Q₂
– m³/h
New Head H₂
– m
New Power P₂
– kW
Formulas, units & assumptions
  • Speed Change (D constant): Q₂ = Q₁·(n₂/n₁), H₂ = H₁·(n₂/n₁)², P₂ = P₁·(n₂/n₁)³
  • Diameter Change (n constant): Q₂ = Q₁·(D₂/D₁), H₂ = H₁·(D₂/D₁)², P₂ = P₁·(D₂/D₁)³
  • Results shown in the same units as inputs (Flow: m³/s, m³/h, L/s, gpm; Head: m, ft; Power: kW, HP; Diameter: mm, cm, m, inch).
  • Assumes constant efficiency. For large changes, verify with pump curves.

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]]> 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)
–
Specific Speed (US Ns)
–
Impeller Type
–
Typical Application
–
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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