1. What is the Flow Equation?

The flow equation \( Q = K \times \sqrt{\Delta P} \) calculates volumetric flow rate from differential pressure measurements, commonly used with orifice plates, venturi meters, and other differential pressure flow sensors.

2. How Does the Calculator Work?

The calculator uses the flow equation:

Where:

• \( Q \) — Volumetric flow rate
• \( K \) — Flow coefficient (constant for a given sensor)
• \( \Delta P \) — Differential pressure (Pa)

Explanation: The equation shows that flow is proportional to the square root of the differential pressure, with K representing the sensor-specific constant that accounts for factors like pipe diameter and fluid properties.

3. Importance of Flow Calculation

Details: Accurate flow measurement is essential for process control, monitoring system performance, and ensuring proper operation of fluid systems in industries like chemical processing, water treatment, and HVAC.

4. Using the Calculator

Tips: Enter the K constant (provided by sensor manufacturer) and the measured differential pressure in Pascals. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find the K constant?
A: The K constant is typically provided by the sensor manufacturer and depends on the specific sensor design and installation.

Q2: What units does this equation use?
A: The equation is unit-consistent - as long as K and ΔP use compatible units, Q will be in the corresponding flow units.

Q3: Does this work for all fluids?
A: The basic equation works for incompressible fluids. For compressible fluids like gases, additional corrections are needed.

Q4: What's the range of validity?
A: The equation is valid within the sensor's specified operating range, typically between 10-90% of full scale.

Q5: How accurate is this method?
A: Accuracy depends on the sensor quality and proper installation, typically ±1-5% of reading for well-maintained systems.