Profile: Voice Engineers Limited offers various types of dryers like vacuum dryers, vacuum band dryers, spin dryers, and spin flash dryers. Static fluid bed dryer has a specially designed perforated plate which is used to keep the product in fluidization by upward moving velocity of air or gas. Fluidization occurs when the drag force of the upward moving gas equals or becomes more than the weight of the particle. Direct industrial rotary dryer operates on the principle of lifting and showering the product through a hot gas stream, moving either in parallel or counter flow. The indirect dryer is more useful to small dusty materials. In indirect dryer, there is little or no contact between the product and drying gases, as they are heated from outside the chamber through a stationary jacket fitted with either multiple burners or other external heat source.