1. What is Hydraulic Pump Displacement?

Hydraulic pump displacement refers to the volume of fluid pumped per revolution of the pump shaft. It's a critical parameter in hydraulic system design, determining the pump's flow capacity at a given speed.

2. How Does the Calculator Work?

The calculator uses the hydraulic pump displacement formula:

Where:

• \( V \) — Displacement (in³/rev)
• \( Q \) — Flow rate (GPM)
• \( RPM \) — Pump speed (revolutions per minute)
• 231 — Conversion factor (cubic inches per gallon)

Explanation: The formula calculates the volume of fluid displaced per revolution based on the flow rate at a given speed.

3. Importance of Displacement Calculation

Details: Knowing pump displacement is essential for system design, pump selection, and troubleshooting hydraulic systems. It helps determine if a pump is properly sized for its application.

4. Using the Calculator

Tips: Enter flow rate in gallons per minute (GPM) and pump speed in revolutions per minute (RPM). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 231 used in the formula?
A: 231 is the conversion factor between gallons and cubic inches (1 gallon = 231 cubic inches).

Q2: What are typical displacement values?
A: Displacement varies widely by pump type and size, ranging from small fractional in³/rev to several in³/rev for industrial pumps.

Q3: How does displacement affect system performance?
A: Higher displacement pumps move more fluid per revolution, allowing for higher flow rates at lower speeds.

Q4: Can this be used for hydraulic motors?
A: Yes, the same formula applies to hydraulic motors when calculating displacement from flow and speed.

Q5: What about metric units?
A: For metric calculations, use liters/minute for flow and cm³/rev for displacement (conversion factor changes).