An air receiver tank is an integral and important part of any compressed air system. Typically a receiver tank is sized at 2 gal/scfm and increased to 4-10 gal/scfm of flow if there are big demand swings or surges. So, if a compressor has a rating of 25 scfm at 100 psig, the receiver tank should be 50 gals minimum up to 250 gals if there are large surges.
In a compressed air system, a receiver tank provides the following benefits:
Much like a water reservoir provides water during times of drought and stores water during the wet times, an air receiver tank compensates for peak demand and helps balance the supply of the compressor with the demand of the system.
Receiver tanks are required by law to have a pressure relief valve and a pressure gauge. The relief valve should be set to 10% higher than the working pressure of the system.
It is also important to install either a manual or automatic drain on the receiver tank to remove water from the system. A coalescing filter and air dryer are best placed downstream of the receiver tank. Read more about drying compressed air.
This post was written by David Connaughton, product marketing manager, Industrial Gas Filtration and Generation Division, Parker Hannifin.
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