GATEs are close-clearance impellers that fit the contour of the vessel.
GATEs obtain adequate mixing under the laminar flow conditions encountered in high viscosity applications. These impellers sweep the whole wall surface of the vessel and agitate most of the fluid batch through physical contact.
Some designs include hinged scrapers to improve heat transfer with the wall and prevent sticking of pasty materials of high viscosity when low shear is adequate.
Gate type agitators are used in wide shallow tanks and for materials of high viscosity when low shear is adequate.
GATE’s shaft speed is low.
Atmospheric or pressure/vacuum use..
Gate impellers are used for liquid viscosities between 5,000 and 100,000 cP.
Cream ageing, Yoghurt, Soft cheese.