Air receiver tanks are designed to provide a supply buffer to meet short-term demand spikes that can exceed the compressor capacity. They also serve to dampen reciprocating compressor pulsations, separate out particles and liquids, and make the compressed air system easier to control. In some cases, installing a larger air receiver tank to meet occasional peak demands can even allow for the use of a smaller air compressor.
There are commonly two different air receivers in a compressed air system:
• PRIMARY receiver – located near the compressor, after the after-cooler but before filtration and drying equipment
• SECONDARY receiver – located close to points of larger intermittent air consumptions
Air receivers in compressed air systems serve the important purposes of:
• Equalising the pressure variation from the start/stop and modulating sequence of the compressor
• Storage of air volume equalising the variation in consumption and demand from the system
• Collecting condensate and water in the air after the compressor