Westfalia manufactured CA-505 solid bowl decanter centrifuges. They have been put to use in the wastewater, chemical, starch and ethanol industries. The rotating assemblys measure 20.1" diameter by 80.4" long. They are offered in a standard cyclo design and a two-gear design. The two-gear design permits automatic torque measurement and differential speed control. This differs from the usual cyclo gear drive by an additional seconary cyclo gear and secondary motor. This high control accuracy of the two-gear permits the smallest differential speed with the best possible drying of the solids. Presently there a few used Westfalia CA-505 decanter centrifuges on the marketplace along with one unused Westfalia CA-505 decanter centrifuge that is a two-gear design unit.