The impeller profi le is specially engineered to open out automatically when the shaft begins to turn and fold back when the agitator is switched off . The impeller section can be passed through a bung diameter of just 115 mm. PPR agitators have a turbine up to 500 mm in diameter, and can also be secured by a mounting plate or a bridge mount with handles for IBCs. We supply with three-phase 50 Hertz tropicalized motors as standard. The standard impeller shaft is made from 316L stainless steel. The PPR agitator is available with multiple options.