1. What is Differential Pressure?

Differential pressure (ΔP) is the difference in pressure between two points in a system. It is calculated by subtracting the downstream pressure (P₂) from the upstream pressure (P₁).

2. How Does the Calculator Work?

The calculator uses the differential pressure equation:

Where:

• \( \Delta P \) — Differential pressure (Pa)
• \( P_1 \) — Upstream pressure (Pa)
• \( P_2 \) — Downstream pressure (Pa)

Explanation: The equation simply calculates the difference between two pressure measurements.

3. Importance of Differential Pressure

Details: Differential pressure measurements are crucial in fluid dynamics, HVAC systems, filtration systems, and many industrial processes to monitor flow, filter condition, and system performance.

4. Using the Calculator

Tips: Enter both pressure values in Pascals (Pa). The calculator will compute the difference between them. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for pressure?
A: This calculator uses Pascals (Pa), but you can convert from other units before entering values.

Q2: Can differential pressure be negative?
A: Yes, a negative ΔP indicates that P₂ is greater than P₁, meaning flow would be in the opposite direction.

Q3: What's a typical differential pressure range?
A: This varies widely by application - from a few Pascals in ventilation systems to thousands in industrial processes.

Q4: How is differential pressure measured?
A: Typically with a differential pressure transducer or manometer connected to two points in a system.

Q5: Why is differential pressure important in filters?
A: Increasing ΔP across a filter indicates it's becoming clogged and may need replacement.