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The Sandpiper series of Heavy-Duty Ball Valve Diaphragm Pumps are designed for flows up to 300 gpm, provide exceptional suction lift capabilities and withstand harsh pumping environments. The rugged ball valve construction allows these air operated diaphragm pumps to move light to highly viscous fluids and handle small solids. This series of Sandpiper pumps are available with a down-port for fluids that have settling solids and an up-port for fluids containing entrained gases, floating or suspended solids. Heavy-duty plunger bushings and check valve balls, diaphragm wear pads, and thick castings all allow these pumps to tolerate severe applications and have extended wear.