The traditional method for determining the compressed air requirements of a new plant is to add up the air consumption (m³/min) of all pneumatic equipment, and then consider adding a safety factor, a leakage factor, and a development factor.
In an existing plant, you can simply perform some basic tests to determine if the compressed air supply is sufficient. If it's insufficient, you can estimate how much more is needed.
Generally, in industrial applications, the output pressure of an air compressor is 0.69 MPa (G), and the pressure delivered to the equipment usage point should be at least 0.62 MPa. This indicates that the typical air compressor we use has an unload pressure of 0.69 MPa (G) and a load pressure of 0.62 MPa (G), also known as the system pressure. With these figures (or the unload and load values of a specific system), we can determine accordingly.