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 does a screw compressor work?

During the screw compressor working, the male rotor gets power from the electric motor via a shaft. As the male rotor receives power from the electric motor, it starts rotating and also rotates the female rotor. When these two meshed rotors start rotating, a cavity produces at the suction end of the compressor.

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.

How does a compressor unloader valve work?

The unloader valve responds to the pressure changes inside the compressor’s storage tank. When the tank pressure reaches the maximum preset pressure, the pressure switch flips a small lever on the switch, which triggers the unloader valve to open and vent the pressurized air.

What is a screw compressor rotor?

The screws of the compressors are also known as rotors. A screw compressor has two rotors (male and female rotors) for the compression of the gas. The male rotor is connected with a shaft. As the shaft rotates, it also rotates the male rotor. The male and female rotors mesh with each other.

What is a liquid injected screw compressor?

In liquid-injected screw compressors, a liquid is injected into the compression chamber and often into the compressor bearings. Its function is to cool and lubricate the compressor element’s moving parts, to cool the air being compressed internally, and to reduce the return leakage to the inlet.