Air pressure (psig or bars) at motor location.
2. Pipe size of air supply system to assure adequate
volume (cfm or m3/min) so as to minimize line loss
(air pressure drop during motor operation).
3. Plant air system pressure may vary during the day
due to use by other equipment; therefore, base the
selection of the air motor on the lowest psig or bars
that can be expected. Then, by using a pressure
regulator in the line at the motor, a uniform air supply
is assured
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