Get current pricing for Oem, OEM-38573-ID Used Pfaudler 4dtw Drive For A 500 Gallon Reactor. 117 Rpm 1.51 P Ratio. 10-1 S Ratio. 15 - 10 A Ratio. 1 Hp Rating At 1750 15.4. No Mdwr 50410-ajd. N . Product Category: Process Equipment, Sub Category: Process Reactors: