1. What is Pump Head Calculation?

Definition: This calculator determines the total dynamic head (TDH) that a pump can generate based on its horsepower, flow rate, fluid density, and efficiency.

Purpose: It helps engineers and technicians select appropriate pumps for fluid systems and verify pump performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( H \) — Pump head (feet)
• \( HP \) — Pump horsepower (HP)
• \( Q \) — Flow rate (gallons per minute)
• \( \rho \) — Fluid density (pounds per gallon)
• \( \eta \) — Pump efficiency factor (0-1)
• 3960 — Conversion constant (ft·lb/min per HP)

Explanation: The formula converts mechanical power to hydraulic power, accounting for fluid properties and pump efficiency.

3. Importance of Pump Head Calculation

Details: Accurate head calculation ensures proper pump selection, prevents cavitation, and optimizes energy consumption in fluid systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the 3960 constant in the formula?
A: It's the conversion factor between horsepower and ft·lb/min (1 HP = 3960 ft·lb/min).

Q2: What's a typical efficiency factor for pumps?
A: Centrifugal pumps typically range from 0.7 to 0.9, with 0.85 being a common default value.

Q3: How do I find fluid density?
A: Water at 60°F is 8.34 lb/gal. For other fluids, consult material safety data sheets or engineering tables.

Q4: Does this calculate total dynamic head (TDH)?
A: Yes, this calculates the total head the pump can generate at the specified conditions.

Q5: Can I use this for viscous fluids?
A: This formula works best for water-like fluids. For viscous fluids, additional correction factors are needed.