1. What is Pump Displacement?

Pump displacement refers to the volume of fluid that a pump can move per revolution. It's a critical parameter in hydraulic systems that determines the pump's flow output capacity at a given rotational speed.

2. How Does the Calculator Work?

The calculator uses the pump displacement formula:

Where:

• \( Disp \) — Pump displacement (cc/rev)
• \( Q \) — Flow rate (L/min)
• \( RPM \) — Revolutions per minute

Explanation: The formula calculates how much fluid volume (in cubic centimeters) the pump moves with each complete revolution based on the flow rate and rotational speed.

3. Importance of Pump Displacement Calculation

Details: Accurate pump displacement calculation is essential for proper hydraulic system design, pump selection, performance prediction, and troubleshooting hydraulic system issues.

4. Using the Calculator

Tips: Enter flow rate in liters per minute (L/min) and RPM (revolutions per minute). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What units are used for pump displacement?
A: Pump displacement is typically measured in cubic centimeters per revolution (cc/rev) or cubic inches per revolution (in³/rev).

Q2: How does displacement relate to pump size?
A: Larger displacement values indicate a physically larger pump that can move more fluid per revolution.

Q3: Can this formula be used for all pump types?
A: This formula works best for positive displacement pumps (gear, piston, vane pumps) but may not be accurate for centrifugal pumps.

Q4: Why multiply by 1000 in the formula?
A: The multiplication by 1000 converts liters to cubic centimeters (1 liter = 1000 cm³).

Q5: How does temperature affect displacement calculations?
A: Temperature affects fluid viscosity and density, which can slightly impact actual flow rates, though the displacement remains constant for a given pump.