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GPM Formula:
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The GPM (Gallons Per Minute) formula converts pressure to flow rate for a nozzle. It calculates the flow rate based on pressure (PSI) and nozzle diameter (d) using the relationship between pressure, area, and flow velocity.
The calculator uses the GPM formula:
Where:
Explanation: The formula accounts for the relationship between pressure, nozzle area, and flow velocity, with the constant 29.7 converting the units to gallons per minute.
Details: Accurate flow rate calculation is crucial for hydraulic system design, irrigation planning, fire protection systems, and industrial fluid applications. It helps determine pump requirements and system efficiency.
Tips: Enter pressure in PSI and nozzle diameter in inches. Both values must be positive numbers. The calculator will compute the flow rate in gallons per minute.
Q1: What is the practical application of this formula?
A: This formula is used in hydraulic engineering, firefighting, irrigation systems, and industrial processes to determine flow rates through nozzles and orifices.
Q2: How accurate is this formula?
A: The formula provides a good estimate for standard nozzle designs but actual flow may vary based on nozzle shape, fluid viscosity, and other factors.
Q3: Can this formula be used for any fluid?
A: The formula is primarily designed for water. For other fluids, viscosity and density corrections may be needed.
Q4: What is the range of validity for this formula?
A: The formula works well for typical pressure ranges (10-200 PSI) and standard nozzle diameters. Extreme values may require more complex calculations.
Q5: How does nozzle diameter affect flow rate?
A: Flow rate increases with the square of the diameter, so doubling the diameter quadruples the flow rate at the same pressure.