STRUCTURE AND SYSTEM: Internal tub, worktop and cover in AISI 0 stainless steel, external cabinet in painted or plastic-coated sheet steel. Electric heating with immersion heaters. Shaking is created with DC motor with helical worm gearbox, with single stage reduction. Power supply to the single phase network obtained with a variable speed drive consisting of: - rectifier - calibratable regulation and compensation circuit with high response speed armature. Automatic gradual start to any speed set on the potentiometer. The potentiometer is adjustable on panel. KW issues a 3 year all-inclusive warranty on the shaker and variable speed drive