1. What is Positive Displacement Pump Head Calculation?

The Positive Displacement Pump Head Calculation determines the total head developed by a positive displacement pump, which is the sum of pressure head and velocity head. This measurement is crucial for understanding pump performance and system requirements.

2. How Does the Calculator Work?

The calculator uses the positive displacement pump head equation:

Where:

• \( H_{pdp} \) — Total head in meters
• \( P \) — Pressure in Pascals
• \( \rho \) — Density in kilograms per cubic meter
• \( g \) — Gravitational acceleration (9.81 m/s²)
• \( v \) — Velocity in meters per second

Explanation: The equation calculates the total head by converting pressure to equivalent head and adding the velocity head component.

3. Importance of Head Calculation

Details: Accurate head calculation is essential for proper pump selection, system design, and ensuring efficient operation of positive displacement pumps in various industrial applications.

4. Using the Calculator

Tips: Enter pressure in Pascals, density in kg/m³, and velocity in m/s. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a positive displacement pump?
A: A positive displacement pump moves fluid by trapping a fixed amount and forcing (displacing) that trapped volume into the discharge pipe.

Q2: How does head differ from pressure?
A: Head represents the height of fluid column equivalent to the pressure, while pressure is the force per unit area exerted by the fluid.

Q3: When is velocity head significant?

Q4: What are typical applications of positive displacement pumps?
A: They are used for high-pressure applications, viscous fluids, metering, and handling shear-sensitive materials.

Q5: How does fluid density affect head calculation?
A: Higher density fluids require more pressure to achieve the same head, as head is inversely proportional to fluid density.