The maximum flow is limited by the 4112W Lubricator. If the Lubricator is removed, the maximum flow rate is 425 CFM.
1-1/2″ FRL System w/ Galvanized Cage, 175 CFM Maximum Flow (Y007, F329-12FW, R3912G, & 4112W).
The minimum flow rate for the Lubricator is 50 CFM.