For operations that process organic material, extremely wet conditions have a negative impact on productivity. To maintain high throughput, the Doppstadt SM 720 and 720K trommels can now quickly convert into a star screen with the drum insert option. Simply remove the existing drum, replace with the star screen insert, and resume operation.

Equally as effective as a dedicated standalone star screen, the star screen insert allows customers to extend the flexibility of their existing SM 720 trommel throughout any season and conditions, according to the manufacturer. Wet, clumpy organic material with moisture content as high as 60 percent or more can continue to be processed, with throughput results as much as 50 percent higher than screening through a drum.

The Doppstadt star screen works on a revised principle utilizing a softer urethane star design for extended life. The star shape on the shaft is elliptical, rather than conventionally round, which aids dramatically in shaft cleaning. Alternate shaft speeds on the deck are effective in the stratification of material feed, leading to a cleaner oversize product and increased production rates, according to the manufacturer.

“This is a great option for customers to maintain full function of their trommel all year,” added Hugh Fagan, DoppstadtUS sales director. “It eliminates the need for many operations to invest in a second machine for only partial use in certain conditions.”

The star screen insert for SM 720 and 720K trommels is now available in the United States market. Doppstadt will be releasing a star screen insert compatible with the SM 617 and SM 726 trommels later this year.

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