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Xhw07s Attachment Valve Operator Worm Gear Box. High Torque Capacity: Standard max out-torque is 750 Nm, with optional output torque range up to 32000 Nm. Compact Design: Precision casting ductile iron housing with compact structure and grease-filled for longer life. Reliable Self-Locking: Features high mechanical efficiency, reliable self-locking function, and high strength steel input shaft. Customizable Flange: Flange connecting to valve can be customized according to ENISO5210 or DIN3210 standards. High Efficiency Bearings: Uses high efficient needle roller bearing assembled on both ends of the worm shaft.