The CFM PSI Calculator is a handy tool designed to assist users in determining the Cubic Feet per Minute (CFM) of air flow based on the Rotations Per Minute (RPM) of a compressor, the piston displacement of the compressor, and the pressure measured in Pounds per Square Inch (PSI). This calculator is particularly useful for individuals working with air compressors, such as mechanics, HVAC technicians, and industrial engineers.
Formula of CFM PSI Calculator
The formula used by the CFM PSI Calculator is as follows:
CFM = (RPM * displacement) / (2.036 * PSI)
Where:
- CFM is the Cubic Feet per Minute, representing the volume of air flow.
- RPM is the Rotations Per Minute of the compressor, indicating the speed at which the compressor operates.
- Displacement is the piston displacement of the compressor in cubic inches per revolution, representing the volume of air displaced by the compressor.
- PSI is the Pounds per Square Inch, representing the pressure of the air.
General Terms Table
| Compressor Size (Cubic Inches) | RPM Range (RPM) | Typical Pressure Range (PSI) | Estimated CFM Range |
|---|---|---|---|
| 2 | 1500-3000 | 20-40 | 2-5 |
| 5 | 2000-4000 | 40-60 | 5-10 |
| 10 | 2500-5000 | 60-80 | 10-15 |
Example of CFM PSI Calculator
Let’s consider an example to illustrate how the CFM PSI Calculator works:
Suppose we have a compressor with an RPM of 1500, a piston displacement of 20 cubic inches per revolution, and a pressure of 100 PSI. Using the formula:
CFM = (1500 * 20) / (2.036 * 100) = 147.15
So, the CFM for this compressor would be approximately 147.15 cubic feet per minute.
Most Common FAQs
A: CFM stands for Cubic Feet per Minute, which measures the volume of air flow in a given period.
A: CFM is important because it helps determine the efficiency and effectiveness of air compressors and other pneumatic systems. It indicates how much air the compressor can deliver to power tools or other equipment.
A: RPM, or Rotations Per Minute, can be measured using a tachometer, which is a device commonly found in automotive and industrial settings. It calculates the number of rotations completed by a spinning object in one minute.
A: Piston displacement refers to the volume of air displaced by the piston in an air compressor during one revolution. It is typically measured in cubic inches per revolution.
A: PSI stands for Pounds per Square Inch, which measures the pressure of the air. It indicates the force exerted by the air on a given area.