The MOW - Modulating Worm model of quarter turn modulating gearboxes are designed for control valves, with various solutions available for different environments and applications. The model has a torque range of up to 47,000Nm (34,500 lbs ft), ratios from 40:1 to 2940:1, and various gear ratios from 40:1 to 2940:1 with spur input reducers.