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Pump Specific Speed (N_s) & Suction Specific Speed (N_ss) Classifier Calculator

Easily calculate and compute pump specific speed (n_s) & suction specific speed (n_ss) classifier calculator with accurate equations, live formulas, and expert guidance.

Operating motor speed.

Flow rate at BEP.

Head developed per single stage.

Cavitation threshold head.

Calculated Result
1,379 US N_s

Specific Speed (N_s)

Specific Speed (N_s)

1,379 US N_s

Specific Speed Ns Us

1379

Suction Specific Speed Nss Us

10512

Metric Specific Speed Ns

26.7

Impeller Hydraulic Classification

Radial Vane Centrifugal (High head, low flow)

1,379 — US N_s

Calculation Breakdown

  1. Applied FormulaComputes the kinematic Specific Speed (N_s) and Suction Specific Speed (N_ss) classifying impellers into radial, Francis, mixed-flow, or axial configurations.N_s = \frac{N \sqrt{Q}}{H^{3/4}}, \quad N_{ss} = \frac{N \sqrt{Q}}{\text{NPSHr}^{3/4}}

Pump Specific Speed (N_s & N_ss) Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.03456901.0k1.4kSpecific Speed (N_s)

What Is the Pump Specific Speed (N_s) & Suction Specific Speed (N_ss) Classifier Calculator?

This tool computes pump specific speed (n_s) & suction specific speed (n_ss) classifier calculator with high precision arithmetic.

How Does the Pump Specific Speed (N_s) & Suction Specific Speed (N_ss) Classifier Calculator Work?

Computes the kinematic Specific Speed (N_s) and Suction Specific Speed (N_ss) classifying impellers into radial, Francis, mixed-flow, or axial configurations.

Pump Specific Speed (N_s) & Suction Specific Speed (N_ss) Classifier Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Ns=NQH3/4,Nss=NQNPSHr3/4N_s = \frac{N \sqrt{Q}}{H^{3/4}}, \quad N_{ss} = \frac{N \sqrt{Q}}{\text{NPSHr}^{3/4}}

Computes the kinematic Specific Speed (N_s) and Suction Specific Speed (N_ss) classifying impellers into radial, Francis, mixed-flow, or axial configurations.

How to Use the Pump Specific Speed (N_s) & Suction Specific Speed (N_ss) Classifier Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Pump Specific Speed (N_s) & Suction Specific Speed (N_ss) Classifier Calculator Example

Input Values:

pumpRotationalSpeedRpm:1750
bestEfficiencyFlowRateGpm:1500
bepHeadFeet:180
npshRequiredFeet:12
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required US N_s.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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