The Hytork XL-series rack & pinion actuator is modular in design and is field convertible from double-acting to spring-return and vice versa. The 12 actuator sizes are designed to automate the most popular quarter turn valves like ball, butterfly and plug valves. Hytork XL actuatos have numerous features that add reliability. Its rugged heavy duty, all coated body is made from a high strength LM25 aluminium casting designed to prevent damage from dents, shock or fatigue