Tag Archives: Compressors

Rotary Screw compressor

Rotary (or twin) screw compressor is widely preferred for large industrial applications in the food industry, automated manufacturing systems and to operate large high power air tools such as jackhammers, pneumatic pumps, riveting tools, sand blasting operation, industrial paint systems and impact wrenches. This compressor uses a rotary type positive displacement mechanism to provide large amounts of continuous and uniform supply of high-pressure air.
Advantage of such compressors over other air and piston compressors are numerous like they are convenient when continuous supply of high pressure air is needed, safe to operate, can operate continuously under extreme load and weather conditions without damaging other crucial components of the machine, energy saving and easy to maintain, runs quietly despite massive air flow, requires much lesser amounts of oil and are built to last for ages.
Basically there are two types of rotary screw compressor i.e the oil-free and secondly the oil-injected rotary screw compressor and another relatively new entrant is the conical screw compressor. Selection of the right type of compressor is important depending upon which type of application it is going to be used in. If there is no immediate need for oil-free compressed air, the more economic way is to go with an oil lubricated unit like an oil-injected screw compressor. Oil-free compressors carry a much greater cost. Although, there are traces of oil in compressed air, those can be cleaned up further by utilizing proper quality air product.

What are Compressors and What are Their Types?

A compressor is a machine that increases the pressure of a gas by bringing down its volume. An air compressor is a type of gas compressor that converts power into some possible energy stored in compressed air. There are many types of compressors, which are as follows:

Positive Displacement, Dynamic and hermetically sealed, open or semi-hermetic. Again the Positive Displacement and Dynamic compressors are subdivided into the following heads:

Positive displacement:
a. Reciprocating compressors
b. Ionic liquid piston compressor
c. Rotary screw compressors
d. Rotary vane compressors
e. Rolling piston
f. Scroll compressors
g. Diaphragm compressors

Dynamic compressor
a. Air bubble compressor
b. Centrifugal compressors
c. Diagonal or mixed-flow compressors
d. Axial-flow compressors

Applications of compressors:
Applications of gas compressors are manifold.

a. Compressors are used to transfer purified natural gas from the production site to the consumer point.

b. Compressors are used in many plants like Petroleum refineries, natural gas processing plants, petrochemical and chemical plants and similar other plants.

c. Compressors are used in refrigerators and air conditioners to move heat.

d. In order to fill high pressure cylinders required for medical, welding and other uses, compressors are needed.

e. Compressors are required in the manufacturing and blow moulding of PET plastic bottles and containers.