Instead of using a stack of single independent rings for riffles as all other centrifuges use, the Neffco bowl uses one continuous winding rubber riffle similar to a screw thread that spirals downward in the direction opposite of the bowl’s rotation. This opposite spiral creates continuous self-cleaning riffles by keeping the feed in a slurry state allowing the gold to pull out and press against the wall.
Manufacturer Ratings *
Weight: 165 lb.
Dimensions: 38″ x 38″ x 25″ high
Feed size: 1/8 minus
Feed rate: 10% of slurry
Water rate: 80-100 GPM
Gold recovery to 400 mesh
* as per manufacturer website 2019