Skip to main content
CalcPro

Centrifugal Pump Affinity Laws Calculator

Easily calculate and compute centrifugal pump affinity laws calculator with accurate equations, live formulas, and expert guidance.

Calculated Result
290 GPM

New Pump Flow Rate Q2 (GPM)

New Pump Flow Rate Q2 (GPM)

290 GPM

New Flow Gpm

290

New Head Ft

54.9

New Bhp

5.69

Speed Ratio

0.829

290 — GPM

Calculation Breakdown

  1. Applied FormulaPredicts the changes in liquid flow rate (GPM), total dynamic head (TDH in feet), and shaft horsepower for centrifugal pumps subject to variable frequency speed adjustments or impeller trimming.\frac{Q_2}{Q_1} = \frac{N_2}{N_1}\frac{D_2}{D_1}, \quad \frac{H_2}{H_1} = \left(\frac{N_2}{N_1}\frac{D_2}{D_1}\right)^2, \quad \frac{P_2}{P_1} = \left(\frac{N_2}{N_1}\right)^3\left(\frac{D_2}{D_1}\right)^3

Pump Affinity Laws Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.073145218290New Pump Flow Rate Q2 (GPM)

What Is the Centrifugal Pump Affinity Laws Calculator?

This tool computes centrifugal pump affinity laws calculator with high precision arithmetic.

How Does the Centrifugal Pump Affinity Laws Calculator Work?

Predicts the changes in liquid flow rate (GPM), total dynamic head (TDH in feet), and shaft horsepower for centrifugal pumps subject to variable frequency speed adjustments or impeller trimming.

Centrifugal Pump Affinity Laws Calculator Formula & Variables

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

Q2Q1=N2N1D2D1,H2H1=(N2N1D2D1)2,P2P1=(N2N1)3(D2D1)3\frac{Q_2}{Q_1} = \frac{N_2}{N_1}\frac{D_2}{D_1}, \quad \frac{H_2}{H_1} = \left(\frac{N_2}{N_1}\frac{D_2}{D_1}\right)^2, \quad \frac{P_2}{P_1} = \left(\frac{N_2}{N_1}\right)^3\left(\frac{D_2}{D_1}\right)^3

Predicts the changes in liquid flow rate (GPM), total dynamic head (TDH in feet), and shaft horsepower for centrifugal pumps subject to variable frequency speed adjustments or impeller trimming.

How to Use the Centrifugal Pump Affinity Laws Calculator

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

Step-by-Step Example Calculation

Centrifugal Pump Affinity Laws Calculator Example

Input Values:

initialSpeedRpm:1750
newSpeedRpm:1450
initialFlowGpm:350
initialHeadFt:80
initialBhp:10
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required GPM.

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.

\n

Related Calculators

Explore more tools and calculators in Technology Calculators

Length Converter

Convert length and distance between metric and imperial units including meters, feet, inches, kilometers, miles, and yards with exact SI definitions.

Percentage Calculator

Calculate percentages: what % X is of Y, P% of X, % change, discount price, and percentage points.

Temperature Converter

Convert temperatures between Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R) with step-by-step thermodynamic formulas.

Wien Bridge Oscillator Frequency & Barkhausen Stability Calculator

Calculates the oscillation frequency f₀, non-inverting op-amp voltage gain A_v, and verifies Barkhausen stability criterion for Wien bridge circuits.

Schmitt Trigger Inverting Comparator Hysteresis Thresholds Calculator

Calculates the upper trip point (V_TP), lower trip point (V_TN), and hysteresis voltage band V_H for inverting op-amp Schmitt trigger circuits.

Active Sallen-Key 2nd-Order Low-Pass Filter Cutoff & Q Calculator

Calculates the corner cutoff frequency f_c, quality factor Q, damping factor ζ, and response shape (Butterworth, Bessel, Chebyshev) for Sallen-Key low-pass filters.