Friday, 25 October 2013

Main Components of Compressed Air Systems

Compressed air systems consist of following major components: Intake air filters, inter-stage
coolers, after-coolers, air-dryers, moisture drain traps, receivers, piping network, filters,
regulators and lubricators.

Intake Air Filters : Prevent dust from entering a compressor; Dust causes sticking valves,
scoured cylinders, excessive wear etc.
Inter-stage Coolers : Reduce the temperature of the air before it enters the next stage to
reduce the work of compression and increase efficiency. They are normally water-cooled.
After-Coolers: The objective is to remove the moisture in the air by reducing the
temperature in a water-cooled heat exchanger.
Air-dryers: The remaining traces of moisture after after-cooler are removed using air dryers,
as air for instrument and pneumatic equipment has to be relatively free of any moisture. The
moisture is removed by using adsorbents like silica gel /activated carbon, or refrigerant
dryers, or heat of compression dryers.
Moisture Drain Traps: Moisture drain traps are used for removal of moisture in the
compressed air. These traps resemble steam traps. Various types of traps used are manual
drain cocks, timer based / automatic drain valves etc.
Receivers : Air receivers are provided as stora ge and smoothening pulsating air output -
reducing pressure variations from the compressor.
Compressor Plant and its parts

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