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Flow Rate Formula:
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The RPM to Flow Rate calculation determines the volumetric flow rate of a pump or hydraulic system based on its rotational speed (RPM) and displacement per revolution. This is essential for designing and analyzing fluid systems.
The calculator uses the flow rate formula:
Where:
Explanation: The formula calculates the total volume of fluid moved per minute by multiplying the number of revolutions per minute by the volume displaced in each revolution.
Details: Accurate flow rate calculation is crucial for system design, performance analysis, efficiency optimization, and ensuring proper operation of hydraulic and pumping systems.
Tips: Enter RPM as a positive number and displacement in liters per revolution. Both values must be greater than zero for accurate calculation.
Q1: What is displacement in pump terminology?
A: Displacement refers to the volume of fluid moved by a pump in one complete revolution, typically measured in liters per revolution (L/rev) or cubic inches per revolution.
Q2: Does this calculation account for pump efficiency?
A: No, this formula gives the theoretical flow rate. Actual flow rate may be lower due to factors like pump efficiency, system pressure, and fluid viscosity.
Q3: Can this formula be used for all types of pumps?
A: This formula works best for positive displacement pumps (gear, piston, vane pumps) where displacement is fixed. It's less accurate for centrifugal pumps whose flow varies with pressure.
Q4: How does temperature affect the calculation?
A: Temperature affects fluid viscosity and density, which can impact actual flow rates, but these factors are not accounted for in this basic calculation.
Q5: What are typical displacement values for common pumps?
A: Displacement values vary widely by pump type and size, ranging from small values like 0.1 L/rev for miniature pumps to 5+ L/rev for large industrial pumps.