1. What is the RPM to GPM Conversion?

The RPM to GPM conversion calculates the flow rate in gallons per minute based on the rotational speed (RPM) and the pump displacement. This is particularly useful in hydraulic systems and pump performance analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( RPM \) — Revolutions Per Minute (fixed at 3450 RPM)
• \( Displacement \) — Pump displacement in cubic inches per revolution (in³/rev)
• \( 231 \) — Conversion factor (cubic inches to gallons)

Explanation: The formula converts the volumetric displacement per revolution into gallons per minute based on the rotational speed.

3. Importance of GPM Calculation

Details: Accurate GPM calculation is essential for proper pump selection, system design, and performance evaluation in hydraulic and fluid transfer applications.

4. Using the Calculator

Tips: Enter the pump displacement value in cubic inches per revolution (in³/rev). The RPM value is fixed at 3450. The displacement must be a positive value.

5. Frequently Asked Questions (FAQ)

Q1: Why is RPM fixed at 3450?
A: 3450 RPM is a common operating speed for many electric motor-driven pumps, particularly in industrial and commercial applications.

Q2: What is the significance of the 231 conversion factor?
A: 231 is the number of cubic inches in one US gallon, which is necessary to convert cubic inches per minute to gallons per minute.

Q3: Can this calculator be used for different RPM values?
A: This specific calculator is designed for 3450 RPM. For other RPM values, a different calculator would be needed.

Q4: What are typical displacement values for pumps?
A: Displacement values vary widely depending on pump type and size, ranging from small fractions to several cubic inches per revolution.

Q5: How accurate is this calculation?
A: The calculation provides theoretical flow rate. Actual flow may vary due to factors like pump efficiency, system pressure, and fluid viscosity.