The pressurized air contains scr screw air compressors energy that can be used to accomplish certain goals. Typically speaking, this type of equipment is used in virtually every type of engineering, manufacturing, or plant operation worldwide. Functions range from inflating tires to assisting in the function of equipment - Scr screw air compressors . There are several different air compression methods that are typically divided into two main categories positive displacement air compressors and negative displacement air compressors. Screw Compressors this type uses two matching helical screws, which turn to create a pocket between them. That allows the air to be transferred into the chamber where it will be compressed. As the screws turn, the volume has a tendency to decrease - Screw Compressor . When you are looking to buy a used air compressor, make sure that you ask about its condition, its prior use, and the number of hours that it has already been used. In orde...