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GPM Formula:
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The PSI to GPM conversion calculates the flow rate of water through a nozzle based on pressure and nozzle diameter. This is essential for hydraulic engineering, irrigation systems, firefighting equipment, and industrial applications where precise flow control is required.
The calculator uses the standard nozzle flow formula:
Where:
Explanation: The formula shows that flow rate increases with the square of nozzle diameter and the square root of pressure, following fluid dynamics principles.
Details: Accurate flow rate calculation is crucial for system design, pump selection, pressure regulation, and ensuring efficient water distribution in various applications from agricultural irrigation to industrial processes.
Tips: Enter pressure in PSI and nozzle diameter in inches. Both values must be positive numbers. The calculator provides flow rate in gallons per minute.
Q1: What is the significance of the constant 29.7?
A: This constant accounts for unit conversions and standard discharge coefficients for water flowing through nozzles under typical conditions.
Q2: Does this formula work for all fluids?
A: This specific formula is calibrated for water. For other fluids, viscosity and density factors would need to be considered.
Q3: How accurate is this calculation?
A: The formula provides good estimates for standard nozzle designs but actual flow may vary based on nozzle shape, surface roughness, and fluid properties.
Q4: What are typical PSI ranges for this calculation?
A: Typically used for pressures ranging from 10-200 PSI, though the formula is mathematically valid for any positive pressure.
Q5: Can this be used for pipe flow calculations?
A: This formula is specifically for nozzle flow. Pipe flow calculations require additional factors like pipe length, friction losses, and fittings.