Selecting the right air compressor is crucial for the user especially with a myriad of options available, understanding your specific requirements and the different types of air compressors is essential for making an informed decision. In this guide, we'll explore the reasons for varying air needs and delve into the characteristics of different air compressor types.
Understanding Your Air Needs
Before diving into the world of air compressors, it's important to assess your air requirements. Consider factors such as the volume of air needed (measured in cubic feet per minute – CFM; litres per second – l/s; litres per minute – l/min; cubic meters per minute – m3/min; cubic meters per hour – m3/hour & other measurements), the various pressure required at point of application (measured in pounds per square inch gauge – PSIG; or Barg), the duty cycle (the percentage of time the compressor will be running). Different applications demand different combinations of these factors. Without looking at these important factors you may end up running a compressor that is not efficient or suitable for your needs.
Types of Air Compressors
Rotary Screw Compressors
These are the most common compressors for industrial requirement. They consist of two rotating screws (male & female known as rotors) to compress the air. They are known for their reliability even with continuous operation, there volumetric efficiency and low noise levels.
Applications: Contact cooled rotary screw type compressors are commonly used in all industrial settings with a constant air demand, while oil-free variants are preferred in applications like food processing, drinks industry, pharmaceutical, medical and electronics.
Reciprocating (Piston) Compressors
These compressors use a piston and cylinder to compress air. They come in both oil-lubricated and oil-free variants.
Applications: Lubricated reciprocating compressors are suitable for applications with light air demand, such as in small garage, workshop and home applications. Oil-free versions are suitable for industries like electronics and pharmaceutical where oil-free air is crucial.
Scroll Compressors
Scroll compressors use two spiral-shaped scrolls to compress air. These compressors are usually oil-free
Applications: Scroll compressors are suitable for smaller-scale applications, such as medical equipment, laboratories, food & drinks, where a compact, oil-free solution is required.
Turbo Compressors
Turbo compressors use high-speed rotating impellers to compress air. They are often oil-free.
Applications: Turbo compressors are found in applications with high-volume, high-pressure requirements, such as in large-scale industrial processes, conveying and chemical plants.
Fixed Speed Compressors
These compressors operate at a fixed speed, delivering a constant airflow.
Applications: Well-suited for applications with a consistent demand for compressed air, like in auto repair shops and some manufacturing processes.
Variable Speed Compressors
These compressors adjust their speed based on the air demand, resulting in energy savings and increased efficiency.
Applications: Perfect for operations with varying air needs, allowing savings in electrical running costs in all applications with a variable airflow.
Choosing the right air compressor involves a thoughtful consideration of your specific requirements, application and understanding the characteristics of different and varied air compressor types. Our team at SIA Compressors & Generators can help you understand your needs and make a recommendation for your business based on our site survey. Contact us today to talk to one of our Compressor Specialists.
