Industrial 39NM1 R4 Pneumatic Rotary Actuator

The Worcester Controls Model 10 39NM1 R4 Series 39 Pneumatic Rotary Actuator is a rack-and-pinion, 90-degree actuator designed for industrial quarter-turn valve automation and process flow control. It operates up to 120 PSI with an air supply range of 40–120 PSI and is commonly used in chemical processing facilities, water and wastewater treatment plants, steam systems, and industrial manufacturing lines requiring reliable valve actuation. Construction includes a corrosion-resistant coated actuator body with stainless steel fasteners, a dual piston guide design to reduce wear, ISO standard valve mounting configuration, and compatibility with ball valves, butterfly valves, and dampers. Control is pneumatic on/off, enabling automated valve positioning and flow isolation through its rack-and-pinion mechanism, with an operating temperature range from -40°F to 180°F. Common replacements include Flowserve Worcester F39 Pneumatic Actuator, Bray Pneumatic Rotary Actuator, and Asco Rack and Pinion Pneumatic Actuator.