What is a rotary screw air compressor?

A rotary screw air compressor is one of the two types of positive displacement gas compressors. It uses two rotors to create the pressure needed for air compression. They are one of the easiest types of air compressors to use and maintain. The other type of positive displacement compressor is the reciprocating or piston compressor.

How do rotary screw compressors work?

An oil-flooded system, the more common type of rotary screw compressor, fills the space between the helical rotors with an oil-based lubricant, which transfers mechanical energy and creates an air-tight hydraulic seal between the two rotors. The atmospheric air enters the system, and the interlaced screws push it through the compressor.

What is the difference between a rotary screw and a reciprocating air compressor?

A rotary screw air compressor delivers 4-5 CFM per HP, while a reciprocating air compressor delivers 3-4 CFM per HP. In other words, if you compare a 20HP reciprocating compressor to a 20HP rotary screw air compressor, the rotary screw will produce 20-25% more air. That means they use less energy to produce the same volume of compressed air.

What are the applications of screw compressors?

Applications of screw compressors are as follows ; 2) Pressure ratio: less than 3 bar in one stage and up to 12 to 14 bar in two stages. 3) It is used in industrial refrigeration. A screw compressor is a type of rotary compressor which compresses air due to screw action.

Are rotary screw air compressors quiet?

Compared to the alternative, yes. The action of the rotary screws is quieter than the action of moving pistons. A rotary screw air compressor may also have a sound-dampening enclosure. A typical rotary screw air compressor will operate at 65-75 dBA, or somewhere between the noise level of a car engine and a vacuum cleaner.

Who is screw compressor technologies?

Screw Compressor Technologies (SCT) located in Buffalo, New York has been in the air end rebuilding business since 1980. SCT will rebuild and restore any air and gas compressing unit to their Original Equipment Manufacturer (OEM) specifications.