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Fire Pump Discharge Pressure Formula:
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Fire pump discharge pressure is the total pressure available at the outlet of a fire pump, calculated as the sum of the suction pressure and the pressure head added by the pump. This is a critical parameter in fire protection system design and operation.
The calculator uses the discharge pressure formula:
Where:
Explanation: The equation calculates the total pressure available at the pump discharge by adding the incoming suction pressure to the pressure increase provided by the pump.
Details: Accurate discharge pressure calculation is essential for ensuring adequate water flow and pressure in fire protection systems, proper pump selection, and compliance with fire safety standards and regulations.
Tips: Enter suction pressure and head pressure in psi. Both values must be non-negative numbers. The calculator will compute the total discharge pressure.
Q1: What is typical discharge pressure for fire pumps?
A: Typical discharge pressures range from 100-300 psi, depending on the application and system requirements, but must meet NFPA standards.
Q2: How does suction pressure affect pump performance?
A: Adequate suction pressure is critical for proper pump operation. Low suction pressure can cause cavitation and reduce pump efficiency.
Q3: What factors contribute to head pressure?
A: Head pressure is determined by pump characteristics, impeller design, motor power, and pump speed.
Q4: Are there limitations to this calculation?
A: This is a simplified calculation that assumes ideal conditions. Actual system performance may vary due to friction losses, elevation changes, and pump efficiency.
Q5: Why is discharge pressure important in fire protection?
A: Proper discharge pressure ensures adequate water flow to sprinklers, standpipes, and hose streams during fire emergencies, which is critical for effective fire suppression.