The Double Shaft Sigma Blade Mixer consists of two counterrotating blades in a rectangular trough, curved at the bottom to form two half cylinders and a saddle section. The blades are either direct driven or driven by means of a belt drive. The bowl tilts for discharge of mixed material. Mechanical discharge is used to tilt the small mixers, and hydraulic discharge is used to tilt the larger mixers.

These mixers are heavy duty and designed for high viscosity, difficult to mix material. Mixing action is accomplished by smearing, stretching, folding, dividing and recombining the material as it is pulled and squeezed against the sigma blades, saddles and walls of the trough. Our tangential sigma blade mixers have the blades running at differential speeds, with the advantages of faster mixing resulting from the constant change of relative position of the material, increased wiped heat transfer area per unit volume and less material above the blades.

The sigma blade mixer is capable of mixing either wet or dry materials. The working volume of a sigma blade mixer is the volume from the bottom of the trough to the top of the blades. Refer to the tables below for capacities and horsepower requirements for our various sigma blade mixers.

Standard material of construction is stainless steel.