Warren Rupp’sSANDPIPER HDB air-operated, double-diaphragm ball valve pumps are designedfor thin-to-viscous and small solids-laden fluids. The pumps providesolid suction-lift capability and variable-porting options (side, top,bottom, and dual). HDB pumps are thick-wall constructed of sand castedaluminum, cast iron, stainless steel, or Alloy C, with elastomer TPE(thermal plastic elastomers) and PTFE options in diaphragms and checkvalves. An extended-wear package is also available.