1 Used Pharmix 316 Stainless Steel Agitator, Model 2000. This is a top mounted agitator used for process mixing, buffer preparation and other continuous agitation needs into vessels up to 250 gallons. Equipped with a right-angle drive with gear reducer – 5 HP, 3/60/208-230-460 volts, 1750 rpm, propeller/chopper and shear agitator and their proprietary seal hygienic coupling for multi-product mixing where impellers are changed to match processing requirements.