Air Screw Compressor – It’s All About Rotary Screw Compressors

There are many kinds of air compressors which you can find readily available in the market. Depending on your current compressor needs, a particular kind will be most suitable for you, such as an inflator or dryer.

There is the reciprocating piston, the rotary screw, the rotary sliding, and centrifugal air compressors. For the sake of this article, we focus more on the screw type air compressor, simply known as the air screw compressor.

Screw air compressors are a type of air compressor that uses two rotating rotors to form a mesh. As the rotor turns, gas is forced into a cavity, pushed until it reaches the discharge port.

There are two kinds of rotors, the male and the female, and the former drives the latter while oil is injected into the cylinder. The oil basically works as a lubricant, coolant, and sealer. There is also the non-lubricated type that uses timing gears to drive the rotors and manage the temperature.

As mentioned above, there are two types of rotary screw air compressor, the oil flooded air screw compressors and the oil-free screw compressors.

The oil flood screw compressors basically start with the motor or generator, which passes mechanical energy to the compressor through a fan belt, enabling it to run. The compressor features two rotating rotors that mesh together creating a pump or suction force through the air intake while forcing the air through progressively smaller piping, in order to compress it.

This is done in an internal cavity which is flooded with oil. As the rotors turn, the oil acts as a coolant and a sealant to prevent the air from escaping. Both gas and oil are pulled into a separation where the gas rises to the top and into a storage tank and the oil filters into a radiator to cool down for reuse.

The oil-free screw compressors work similarly to that of its oiled counterpart. As the rotors turn, air is sucked into the compressor and compressed air is sent into a tank. However, the oil-less compressor creates more heat and is less energy efficient, since oil is not present to act as a sealant, though it nevertheless is far more efficient than electrical gas compressors.

More often than not, in applications where oil contamination is not acceptable, such as medical and computer hardware applications, this type of screw compressor is very useful.

Incidentally, if you’re currently in the market for an air screw compressor, you may want to check out the different products online. You may even be able to find a cheaper refurbished used rotary screw air compressor in various secondhand sites or auction sites.

So, the next time you’re thinking of doing manual labor, consider getting a screw compressor to make things easier on your part, you may even find a tankless one.

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