3-blade "Trifoil" with vertical extensions 980mm dia. High speed disperser - approx. 300mm dia saw tooth blade. "Floating" stainless steel top cover for vessels 1130mm DIA. 45kW 1470-rpm 415/3/50 EExd IIB T4 main drive. 3kW 1430-rpm 415/3/50 EExd IIB T4 secondary drive for lift / lower ram. Main and secondary drives are both variable speed.