Garlock offers a full range of butterfly valve accessories, including standard handles, special locking handles, gear operators, air actuators, limit switches, and electro-pneumatic positioners. Handles Both our standard Handle assembly and special Locking Handle assembly are available. Standard Handles available from 2 in / 50.8 mm to 8 in / 203 mm Locking Handles available from 2 in / 50.8 mm to 4 in / 101 mm Gear Operators Gear operators available on all sizes, 2in / 50.8mm to 24in / 610mm Air Actuators Garlock Scotch Yoke air actuators are 60% more efficient than competitive Rack and Pinion actuators, plus they are 30% lighter. Offered in both double- and single-acting, Garlock air actuators are guaranteed to 2 million air actuation cycles.