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Discharge Pressure Formula:
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Pump discharge pressure is the pressure developed by a pump at its outlet, calculated from the fluid head. It represents the energy imparted to the fluid by the pump and is crucial for determining the pump's ability to move fluid through a system.
The calculator uses the discharge pressure formula:
Where:
Explanation: This formula converts the energy head developed by the pump into pressure, accounting for the fluid's density and gravitational effects.
Details: Accurate discharge pressure calculation is essential for pump selection, system design, ensuring adequate flow rates, and preventing cavitation or system failure.
Tips: Enter fluid density in kg/m³, gravitational acceleration in m/s² (default is 9.81), and head in meters. All values must be positive numbers.
Q1: What is the relationship between head and pressure?
A: Head represents the height of a fluid column that the pump could create, while pressure is the force per unit area. They are related through the fluid density and gravity.
Q2: Why is density important in this calculation?
A: Denser fluids require more pressure to achieve the same head. Water (1000 kg/m³) and oil (800 kg/m³) at the same head will have different discharge pressures.
Q3: When should I use a value other than 9.81 for gravity?
A: Use standard gravity (9.81 m/s²) for most applications. For precision calculations at different altitudes or locations, the local gravitational acceleration should be used.
Q4: How does this relate to pump performance curves?
A: Pump performance curves typically show head vs. flow rate. This calculation converts the head value from the curve to pressure for specific fluid conditions.
Q5: Can this formula be used for all fluid types?
A: Yes, but the density must be appropriate for the fluid being pumped. For gases or compressible fluids, additional considerations may be needed.