1. What is the Pump Size Equation?

The pump size equation calculates the appropriate pump size based on flow rate and fluid velocity. Proper sizing is essential for efficient pump operation and system performance.

2. How Does the Calculator Work?

The calculator uses the pump size equation:

Where:

• \( Flow \) — Flow rate in gallons per minute (gpm)
• \( Velocity \) — Fluid velocity in feet per second (ft/s)

Explanation: The equation determines the pump size needed to handle a specific flow rate at a desired velocity.

3. Importance of Proper Pump Sizing

Details: Correct pump sizing ensures energy efficiency, prevents cavitation, reduces wear and tear, and maintains optimal system performance.

4. Using the Calculator

Tips: Enter flow rate in gpm and desired velocity in ft/s. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical velocity range for suction lines?
A: For suction lines, recommended velocity is typically 2-5 ft/s to prevent cavitation and ensure proper pump operation.

Q2: How does pipe size affect pump selection?
A: Pipe size affects fluid velocity - smaller pipes increase velocity at the same flow rate, which may require more powerful pumps.

Q3: What factors besides size should be considered?
A: Fluid properties, system head, NPSH available, and pump efficiency should all be considered in pump selection.

Q4: What happens if the pump is oversized?
A: Oversized pumps operate inefficiently, waste energy, and may experience premature wear due to operating far from their best efficiency point.

Q5: Can this calculator be used for all pump types?
A: This provides a basic sizing estimate. Specific pump types (centrifugal, positive displacement, etc.) may require additional considerations.