1. What is Discharge Head?

Discharge Head represents the total head developed by a pump, measured in feet. It is the difference between the discharge head and suction head, accounting for the fluid's specific gravity. This measurement is crucial for understanding pump performance and system requirements.

2. How Does the Calculator Work?

The calculator uses the Discharge Head formula:

Where:

• \( Head \) — Discharge head (ft)
• \( PD \) — Discharge pressure (psi)
• \( PS \) — Suction pressure (psi)
• \( SG \) — Specific gravity (unitless)
• \( 2.31 \) — Conversion factor (ft/psi water)

Explanation: The formula calculates the total head developed by converting pressure difference to equivalent head, adjusted for the fluid's specific gravity relative to water.

3. Importance of Discharge Head Calculation

Details: Accurate discharge head calculation is essential for proper pump selection, system design, performance evaluation, and ensuring pumps operate within their designed parameters for optimal efficiency and longevity.

4. Using the Calculator

Tips: Enter discharge pressure and suction pressure in psi, specific gravity as a unitless value (1.000 for water). All values must be valid (pressures ≥ 0, specific gravity > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of 2.31 in the formula?
A: 2.31 is the conversion factor from psi to feet of water head (1 psi = 2.31 ft of water head at standard conditions).

Q2: Why is specific gravity important?
A: Specific gravity adjusts the calculation for fluids denser or lighter than water, ensuring accurate head calculations for different liquids.

Q3: What are typical discharge head values?
A: Values vary by application but typically range from 50-500 ft for most industrial pumps, depending on system requirements and pump type.

Q4: Can suction pressure be higher than discharge pressure?
A: No, for a functioning pump, discharge pressure must always be higher than suction pressure to create flow.

Q5: How does temperature affect the calculation?
A: Temperature affects fluid density and specific gravity. Use SG values appropriate for the operating temperature for accurate results.