Air receivers are metal vessels with compressed air inside them.
They are equipped with a pressure relief valve designed to vent pressure in case of pressure surges in the system; inlet and outlet nozzles to connect to the pipeline system and let gas pass through from the receiver; and a condensate drain pipe.
Installation of a receiver minimizes pulsation in the system caused by a reciprocating compressor, thus preventing breakdowns and, as a result, decreasing performance, since virtually all types of pneumatic equipment are very sensitive to pressure drops in compressed air pipelines.
Receivers are designed to equalize pressure variation, reduce unstable pressure peaks, and multiple starts and stops of the compressor and condensate risk. Minimization of compressed air pulsations allows the compressor to work more smoothly and requires fewer starts of the engine. During the time when the air is in the receiver, its temperature drops and condensate forms.
There is another function of the receiver – storage and cooling of compressed air. The air receiver acts as a source of compressed air at its peak demand for a short period of time.