The rugged construction and extra-thick pump casing of Ramparts air-driven diaphragm pumps stand up to the abuses of the most demanding sludge and slurry applications. They overcome the “high-wear” problem commonly found in double diaphragm and progressive cavity pumps. Air Driven Diaphragm pumps are capable of operating dry on suction lifts up to 20 feet (6.5 m) and handling liquids with solid contents up to approximately 70%. Depending on the pump model, they will pass up to 3" (76 mm) diameter spherical solids. (Solids size is determined by check valve type.) Pump stroke rate, discharge stroke time, suction drive pressure and discharge drive pressure can all be adjusted independently. Pumps will easily handle heavy sludges at their rate of accumulation in clarifiers and settling basins. When it comes to handling heavy sludges and slurries, there’s only one name you need to know—Ramparts Pumps.