The 6” Model 6DDSX107 Double Disc Pump from Penn Valley Pump is one of the best pumps on the market to remove sludge and slurry. This is our most common pump size and is a solid workhorse for just about any sludge or slurry application you run across. This pump is routinely used for higher flow primary sludge applications as well as scum, WAS transfer, digested sludge transfer, thickened sludge transfer, truck loading and dewatering feed applications to include: belt press, centrifuge, rotary press, screw press, RDT and GBT feed. This cast iron pump can run dry without damage and has no fouling problems. It has a flow range of up to 550 GPM and can handle up to 2” solids as well as line size semi-solids. This pump operates at speeds up to 400 RPM.