1. What is Compressed Air Flow Measurement?

Definition: This calculator measures the equivalent flow rate of compressed air in gallons per minute (GPM) based on velocity and cross-sectional area.

Purpose: It helps engineers and technicians determine the flow rate of compressed air systems for proper system design and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (gallons per minute, GPM)
• \( V \) — Velocity of air (feet per second, ft/s)
• \( A \) — Cross-sectional area (square feet, ft²)
• 448.83 — Conversion factor (ft³/s to GPM)

Explanation: The velocity and area are multiplied to get volumetric flow in ft³/s, then converted to GPM.

3. Importance of Compressed Air Flow Measurement

Details: Accurate flow measurement ensures proper system performance, energy efficiency, and helps identify leaks or restrictions in compressed air systems.

4. Using the Calculator

Tips: Enter the velocity in ft/s and cross-sectional area in ft². Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the significance of 448.83 in the formula?
A: This converts cubic feet per second (ft³/s) to gallons per minute (GPM) (1 ft³/s = 448.83 GPM).

Q2: How do I measure air velocity in a pipe?
A: Use an anemometer or calculate from pressure differential and pipe characteristics.

Q3: What's a typical velocity for compressed air systems?
A: Typically 20-30 ft/s for main lines, but can vary based on application and pressure.

Q4: Does this account for compressed air density changes?
A: No, this calculates equivalent GPM flow. For mass flow, additional factors are needed.

Q5: Can I use this for liquid flow measurement?
A: The same formula works for liquids, but the conversion factor would be different.