IW

High torque part-turn worm gear operators for the operation of ball, plug and butterfly valves. Designed to suit motorised isolating duty applications. Low lead angle gearing to be inherently self-locking. Increased torque output per size compared to IW Mk1. 21 sizes (IW3 to IW13) torque range up to 203,000 Nm (149,725 lbf.ft). 4 sizes (IW14 to IW17) torque range 250,000 to 850,000 Nm (184,391 to 626,927 lbf.ft).