Screw compressors, usually placed in the quiet air compressor category, or known as rotary screw air compressors, are designed to handle a wide range of dry material transferring applications, from sand granulates, to cement and plastic, lime and silicate. The basic operation of a screw compressor consists of two screw rotors, placed into action by gas compression.

These two screws, male and female, operate in reverse direction, with the male rotor powering the female rotor. There are two type of rotary screw compressors, one being oil-free where their is a thin film of oil between, then there is a dry version, in which a set of timing gears is used to help flow the screws.

Beyond the basic operation of the two screws, there are other, familiar operations to any machine. The container is split into a fill cavity and a discharge cavity, whereby gas is compressed into the discharge port, forcing the air to operate, or turn, the screws.

Once the rotation, or starting process, of the screw rotors decreases, known as the admissions phase, the exhaust phase comes into action, in which the rotors have completed their cycle and the gas is discharged.

Though they are not known for the highest of pressures, they are much quieter than other compressors and have an extreme reliability rating due its style of operation, making it ideal in several applications, such as hydraulic power systems, stationary and electric motor and mobile applications.

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Filed under: Quiet Air Compressors