USED WORCESTER CONTROLS (FLOWSERVE) 10 39S

The Worcester Controls Model 10 39S Spring Return Pneumatic Actuator (120 PSI) is a heavy-duty rotary actuator designed to automatically operate valves using compressed air while providing a fail-safe spring return function. When air pressure is applied (up to approximately 120 PSI), the actuator rotates the valve to the open or closed position depending on configuration, and when air supply is removed, the internal spring mechanism automatically returns the valve to its original safe position. This spring return feature is essential for safety-critical applications where valves must default to a known position during power or air loss conditions.
Built for industrial reliability, this actuator is commonly used to control quarter-turn valves such as ball, plug, or butterfly valves in process piping systems. It is widely used in industries such as chemical processing, water and wastewater treatment, oil and gas, HVAC systems, and general industrial automation. Its rugged construction allows it to perform consistently in demanding environments where precise and repeatable valve actuation is required. The Model 10 39S is typically mounted directly to compatible valve assemblies and integrates easily into pneumatic control systems for automated flow regulation and shutdown safety.
Key Features:
Spring return pneumatic rotary actuator
Fail-safe return position on air loss
Operates up to 120 PSI air pressure
Designed for quarter-turn valve automation
Rugged industrial construction
Reliable and repeatable valve control
Direct mount for ball, plug, and butterfly valves
Specifications:
Brand: Worcester Controls (Flowserve)
Model: 10 39S
Type: Spring Return Pneumatic Actuator
Operating Pressure: Up to 120 PSI
Function: Rotary valve actuation (quarter-turn)
Action: Spring return (fail-safe)
Mounting: Direct valve mount (industry standard)
Applications:
Chemical processing systems
Water and wastewater treatment plants
Oil and gas pipeline systems
HVAC and industrial airflow control
Process automation and flow control
Safety shutdown valve systems

Weight: 11 lbs
Dimensions: 12 × 11 × 7 in