Q Turn Worm Gear Operator is specially designed to operate valves that turn through 90 degree. The Worm Gear Operator is fitted with mechanical stoppers to set the operation within ± 5 degree of the extreme positions. The Worm Gear Operator is provided with mechanical position indicator on these units to show the valve position. Q Turn Worm Gear Operator functions in a torque range varying from 200 NM to 250000 NM.