Warren Rupp’sSandpiper AODD heavy-duty, flap-valve (HDF) pumps are designed for abrasiveslurries, suspended and nonsuspended solids, and line-size solidsrequirements. All HDF (SA) pumps are configured in bottom-dischargeporting arrangements. HDF pumps are thick wall constructed ofsand-casted aluminum, cast iron and stainless steel with elastomer, TPE(thermal plastic elastomers), and PTFE options in diaphragms and checkvalves. HDF pumps are enhanced with an extended wear package.