SANDPIPER E02 Metallic Standard Duty Ball Valve Pumps are ideally suited for intermittent, on-demand, portable, moderately abrasive fluids, and suspended solids. Standard duty pumps are constructed in Aluminum, Cast Iron, Stainless Steel and non-metallic materials such as PTFE, Polypropylene, and PVDF with Elastomer TPE (thermal plastic elastomers) and PTFE options in diaphragms and check valves.