1. What is Pump Head Calculation?

Definition: This calculator determines the total dynamic head a pump can produce based on its power, efficiency, flow rate, and fluid density.

Purpose: It helps engineers and technicians evaluate pump performance and ensure proper system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( H \) — Total dynamic head (feet)
• \( HP \) — Pump horsepower
• \( \eta \) — Pump efficiency factor (0-1)
• \( Q \) — Flow rate (gallons per minute)
• \( \rho \) — Fluid density (pounds per gallon)

Explanation: The formula converts horsepower to head by accounting for pump efficiency and the work required to move the specific fluid.

3. Importance of Pump Head Calculation

Details: Proper head calculation ensures the pump can overcome system resistance and deliver required flow rates.

4. Using the Calculator

Tips: Enter the pump horsepower (HP), efficiency factor (default 0.85), flow rate (GPM), and fluid density (default 8.34 lb/gal for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the 3960 constant in the formula?
A: This is a conversion factor that relates horsepower, flow rate, and head in the imperial unit system.

Q2: What's a typical pump efficiency value?
A: Most centrifugal pumps operate between 50-85% efficiency, with higher values for larger, well-designed pumps.

Q3: How does fluid density affect pump head?
A: Higher density fluids require more energy to pump, resulting in lower head for the same power input.

Q4: What units should I use for accurate results?
A: The calculator requires horsepower (HP), gallons per minute (GPM), and pounds per gallon (lb/gal) for proper results.

Q5: Does this calculate theoretical or actual head?
A: This calculates theoretical head. Actual system head may vary due to piping configuration and other factors.