Worcester Controls B-RK34-R1 Actuator Repair Kit

The Worcester Controls Flowserve 25F39SN6 R7 Pneumatic Actuator Series F39 Valve is a rugged industrial automated valve assembly that provides pneumatic quarter-turn flow isolation for process control and automated fluid handling applications. It combines a 316 stainless steel ball valve with a twin-piston rack-and-pinion actuator, pneumatic spring return, and 90-degree rotation for direct-mounted valve automation, making it suitable for demanding environments in chemical processing, water treatment, and manufacturing automation. Key specifications include operating pressure from 40–120 PSI (maximum 120 PSI), an aluminum actuator housing with corrosion-resistant construction, and stainless steel guide rods and fasteners; the valve body material is 316 stainless steel and the seat material is reinforced TFE. Mounting supports ISO 5211 and NAMUR, with connections that are industrial threaded or process-type depending on valve configuration. The system is designed for clean compressed air or non-corrosive gas, and is compatible with media such as water, steam, oil, and chemicals, offering an approximate 5 million cycle life before overhaul and a temperature range of -40°F to 180°F. Typical uses span water and wastewater treatment, chemical processing, steam systems, and broader industrial automation where reliable actuation and corrosion resistance are essential, with common replacements including Flowserve Worcester F39 actuated ball valves, Bray, and Asco assemblies.