The rugged construction and extra-thick 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 solids contents up to approximately 70%. Depending on pump model, they will pass up to 3 (76 mm) diameter spherical solids. (Solids size determined by check valve type.)