What Is Air Compressor Fad And Why You Need It?

In the realm of compressed air technology, the term “FAD” holds immense significance. FAD, an acronym for Free Air Delivery, is a crucial parameter that measures the volume of air an air compressor can deliver at atmospheric pressure. Understanding the concept of FAD is essential for selecting the right air compressor for your specific application. This blog post delves into the intricacies of FAD, exploring its implications and providing insights into its importance in the world of air compressors.

Defining Air Compressor FAD

FAD is a measure of the actual volume of air an air compressor can deliver at a specific pressure, typically atmospheric pressure (14.7 psia or 1 bar). It represents the total amount of air the compressor can move per unit of time, usually expressed in cubic feet per minute (CFM) or cubic meters per minute (m³/min).

Importance of FAD in Air Compressor Selection

FAD is a critical factor in air compressor selection because it determines the compressor’s capacity to meet the air demand of your application. An undersized compressor with insufficient FAD may struggle to meet the required air volume, leading to inefficient operation and potential equipment damage. Conversely, an oversized compressor with excessive FAD can result in wasted energy and higher operating costs.

Factors Affecting FAD

Several factors influence the FAD of an air compressor, including:

• Compressor Type: Different compressor types have varying FAD capabilities. Rotary screw compressors typically have higher FAD than reciprocating compressors.
• Compressor Size: Larger compressors generally have higher FAD than smaller ones.
• Operating Pressure: FAD is measured at atmospheric pressure. As the operating pressure increases, the FAD decreases.
• Air Intake Conditions: Temperature and humidity can affect FAD. Higher temperatures and humidity can reduce FAD.

Calculating Air Compressor FAD

FAD can be calculated using the following formula:

“`
FAD = CFM x Pressure Ratio
“`

where:

• CFM is the compressor’s free air delivery at atmospheric pressure
• Pressure Ratio is the ratio of the operating pressure to atmospheric pressure

FAD vs. CFM

While FAD and CFM are both measures of air volume, they differ in their significance. CFM refers to the volume of air an air compressor can deliver at the rated operating pressure, while FAD measures the volume at atmospheric pressure. In most cases, FAD is a more accurate representation of the actual air volume available for use.

Applications of FAD

FAD plays a vital role in various applications, including:

• Pneumatic Tools: FAD ensures sufficient air supply for the efficient operation of pneumatic tools.
• Air Line Systems: FAD determines the capacity of an air line system to meet the air demand of multiple devices.
• Industrial Processes: FAD is critical in processes that require a specific volume of air, such as painting, sandblasting, and drying.

Summary: The Significance of FAD in Air Compressor Performance

FAD is an indispensable parameter in the evaluation and selection of air compressors. By understanding the concept of FAD, you can make informed decisions about the right compressor for your application. Considering factors such as compressor type, size, operating pressure, and air intake conditions will ensure you choose a compressor that meets your specific air volume requirements.

Questions We Hear a Lot

1. What is the difference between FAD and CFM?
FAD measures air volume at atmospheric pressure, while CFM measures air volume at the rated operating pressure.

2. How do I calculate FAD?
Use the formula: FAD = CFM x Pressure Ratio.

3. Why is FAD important in air compressor selection?
FAD ensures the compressor can meet the air demand of your application.

4. What factors affect FAD?
Compressor type, size, operating pressure, and air intake conditions.

5. How can I improve FAD?
Choose a larger compressor, operate at lower pressure, or improve air intake conditions.