1. What is the Pump Size Equation?

The Pump Size equation calculates the appropriate pump size based on flow rate and head pressure. It provides a fundamental relationship between these key hydraulic parameters for proper pump selection.

2. How Does the Calculator Work?

The calculator uses the Pump Size equation:

Where:

• \( Flow \) — Flow rate in gallons per minute (gpm)
• \( Head \) — Head pressure in feet (ft)

Explanation: The equation calculates the pump size by dividing the flow rate by the head pressure, providing a dimensionless size parameter for pump selection.

3. Importance of Pump Size Calculation

Details: Accurate pump size calculation is crucial for selecting the right pump for specific applications, ensuring optimal performance, energy efficiency, and system reliability.

4. Using the Calculator

Tips: Enter flow rate in gpm and head pressure in ft. All values must be valid positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for flow and head?
A: Flow should be entered in gallons per minute (gpm) and head in feet (ft) for accurate results.

Q2: How accurate is this calculation?
A: This provides a basic sizing parameter. Actual pump selection should consider additional factors like efficiency curves, NPSH requirements, and specific application needs.

Q3: Can this be used for all pump types?
A: This is a general sizing equation. Different pump types (centrifugal, positive displacement, etc.) may require additional specific calculations.

Q4: What if I have multiple flow/head points?
A: For systems with varying operating conditions, calculate for worst-case scenarios and consult pump performance curves.

Q5: Should safety factors be applied?
A: Yes, typical engineering practice includes applying appropriate safety factors to account for system losses and future requirements.