If a reciprocating compressor is selected, there are some special features that should be considered. For any compressor that is going to automatically cycle on and off, further consideration should be given to the number of motor starts that may occur every hour.
In compressors of this size range, the number of starts per hour should not exceed 6 to 8. Excessive motor starts may cause extra stress and over-heating of the motor, which may result in reduced life expectancy or premature failure. This can be controlled in a few different ways.
The first way is to ensure that a suitable volume of air is stored when the compressor shuts down to allow it to be off for a reasonable period of time. The air storage will be determined by two factors – the differential pressure between the start and stop of the compressor, and the size of the air… Read the rest