Rotating Inner Drum Autoclaves (RIDA) are used for sterilizing or steam processing regulated medical waste and other non-homogeneous solids or slurries which would entangle any other device that uses an agitator.  The inner drum contains spiral flights that help the content mix and tumble when the drum rotates. Because the flights are in a spiral configuration, the inner drum loads when rotated forwards; but when the drum is rotated in reverse, it completely self-empties all solids and liquids.


Stationary autoclaves require a very long time for the center of a one cubic meter cart to reach sterilization temperatures. In comparison, imagine how long it would take to cook a 1000 lb. turkey. The tumbling action of the inner drum exposes all of the processed material directly to steam which heats it almost instantly. Most users run a 1.5 hour cycle and use 0.4 lbs of steam per lb of municipal solid waste (MSW).

This table indicates Liberty Welding and Bartlett Engineering's two popular hospital sized model types, their dimensions by diameter and length, the maximum volume of their inner drums, and the maximum weight that each inner drum can hold. We have produced over 150 units scattered to all corners of the US, Mexico, China (with ML), Japan, Saudi Arabia, Qatar, and England (with CE per PED).

Rotoclave size comp.jpg