IMI STI PT Series SR/CCK Valve Positioner Double Single Acting for Butterfly Plug Ball Valves

The IMI STI PT Series SR/CCK Valve Positioner

The IMI STI PT Series SR/CCK Valve Positioner is a robust, high-reliability pneumatic positioner engineered for precise proportional control in industrial valve applications. Part of IMI STI's trusted PT Series, the SR/CCK delivers exceptional performance in demanding environments, ensuring accurate valve positioning for enhanced process control and operational efficiency.

The SR/CCK is specifically designed for proportional quarter-turn operation, making it ideal for actuating butterfly, plug, ball valves, and similar rotary devices. It can also be adapted for linear actuators using a dedicated bracket. Positioned in the control circuit between the air filter regulator and the actuator, this heavy-duty positioner operates on the balanced-forces principle, with air distribution managed by a reliable spool valve. Available in double-acting configuration (convertible to single-acting), it supports a wide range of actuator strokes through interchangeable linear cams (up to 270°). Built for harsh industrial conditions, the SR/CCK offers outstanding durability, high repeatability, and suitability for hazardous areas in sectors like oil and gas, refining, chemical processing, power generation, and metal production.

• Heavy-duty metallic construction for maximum reliability in aggressive environments
• Proportional control for rotary (quarter-turn) and adaptable linear actuators
• Double-acting design with single-acting capability
• Interchangeable linear cams (up to 270°) for flexible stroke adjustment; custom profiles available
• Balanced-forces spool valve system for precise air distribution and fast response
• Split-range signal support for multi-actuator sequencing
• Optional full stainless steel spool valve for enhanced corrosion resistance
• High hysteresis and linearity performance
• Outdoor installation-ready with robust protection

• Oil and gas production and refining
• Chemical and petrochemical plants
• Power generation facilities
• Metal processing and mining operations
• Any automated system requiring reliable quarter-turn or linear valve actuation in harsh, hazardous, or high-demand environments

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