Specifically designed for challenging fluid-transfer applications, the TC-X500 is fitted with a heavy-duty, mechanically actuated shifting mechanism and non-centering, coil-spring-assisted air motor. The 2” metallic-flap valve, air-operated double-diaphragm pump resists stalling and freezing in most conditions. The pump achieves high flow rates and discharge heads and is designed with a top-down fluid-flow configuration. The top inlet and bottom outlet help facilitate the transfer of large solids or heavy, slurry-laden liquids efficiently. Heavy-duty HNBR rubber-encapsulated steel flap valves are capable of handling very large sized solids up to 1.77” (45 mm). The pump offers a maximum flow rate of 190.2 gal/min, and a maximum discharge head of 280’.