There are several types of rotary screw air compressors, each with its specific features and applications. The main differences between these types are as follows:
Oil-Injected vs. Oil-Free:
Oil-injected rotary screw compressors use lubricating oil to seal the internal clearances and provide cooling, resulting in higher efficiency and longer life. However, the compressed air may contain traces of oil, which is not suitable for certain applications such as food processing or pharmaceuticals.
Oil-free rotary screw compressors use non-contacting, high-precision rotors, and specialized coatings to eliminate the need for oil. This ensures that the compressed air is free of oil contaminants, making it suitable for sensitive applications.
Fixed Speed vs. Variable Speed Drive (VSD):
Fixed-speed rotary screw compressors operate at a constant speed, providing a consistent flow of compressed air. They are suitable for applications with relatively stable air demand.
Variable speed drive (VSD) rotary screw compressors have a drive system that adjusts the speed of the compressor to match the air demand. This results in energy savings, especially in applications with varying air demand.
Portable vs. Stationary:
Portable rotary screw compressors are designed for mobility and are often used in construction, road maintenance, and other mobile applications.
Stationary rotary screw compressors are installed in a fixed location and are suitable for industrial and commercial applications where a constant air supply is required.
Size and Capacity:
Rotary screw compressors come in various sizes and capacities to meet different air demand requirements. Smaller units are often used for light industrial or commercial applications, while larger units are used in heavy industrial settings.
About Us
Professional Air Compressor Manufacturer Since 1985
Nanxiang Air Compressor, restructured from state-owned enterprise ( Nanchang Air Compressor Factory), is one of the earliest Chinese manufacturers specializing in air compressors. As a certified supplier of China National Nuclear Corporation (CNNC), Nanxiang focus on the production of high-quality air compressors. The product range include permanent magnet variable speed screw air compressors, oil-free air compressors, centrifugal compressors, etc. all products are certified by ISO & CE.
