Hayward’s HRS Series electric actuators are designed and produced to provide years of service in demanding  industrial environments such as chemical processing, waste and water treatment, power generation, oil & gas,  marine, mining and building services. These quarter-turn units drive dampers, ball valves, butterfly valves or inlet  guide vanes that require torque ranges from 300 lbf-in up through 177,000 lbf-in. The HR Series housings are  designed to meet NEMA 4X environmental demands, with ISO5211 compliant mounting that readily mounts up to  most valves in the industries served. Featuring an epicyclic transmission system, the HRS Series provides highly  efficient multiplication of motor power to produce uniquely compact torque ranges compared to other technologies.  A clutch-free manual override system provides full-time override capabilities during powered or un-powered events,  and allows for simple adaptation for overhead chain-wheel drive installations.