CML - Control drive enclosed actuator


CML pneumatic actuator system is composed of an actuator (SC series) and a manual override integrated into a steel housing which is portable. This rugged construction guarantees continuous operation in harsh environments, for example in power stations, steel industries, petrochemical plants or desert areas etc.
CML provides small to medium torque (up to 100 daNm) for angular control of dampers, butterfly valves, speed variators, radial vanes etc. 
Manual operation is by a clutchable lever, equipped with a mechanical system. This system allows the movement of the actuator through an external lever and locks it in the required position.


    • Designed for a long operating life
    • Easy installation of a wide range of accessories on a separate internal panel
    • Easy maintenance
    • Internal linear SC actuator with built-in permanent lubrication system
    • Balancing Security Sensor device (BSS) to switches automatically from manual function to modulating with signal only when the signal matches position where actuator is mechanically locked from manual override
    • Manual override built-in as standard
    • No competitors have such a wide range of products


Operating pressure

Pneumatic version up to 10 barg

(special version available on request)

Standard operating temperature

-20°C to 70°C

(lower or higher temperature on request)

Sizes for CML-1



Sizes for CML-2



Working lever operating angle

63/125 and 100/100 = 90° 

100/200 and 125/200 = 70°


Carbon steel



PED 2014/68/EU

ATEX 2014/34/EU

IP66 according to IEC/EN 60529

Further certifications are available, please contact us for updated list.


IMI STI valves, actuators, positioners, CM Series, CML - Control drive enclosed actuator

SC series of actuators is provided with a built-in permanent lubrication system, patented by IMI STI, which assures an extremely smooth valve operation even if dry instrument air is used. Thanks to this lubrication system, which is common to IMI STI linear actuators, no maintenance to moving parts is required, even after many years of continuous service.

The patented lubrication system consists mainly of a grease lubricant filled annular cavity placed inside the cylinder piston, between a sealing ring and a sliding ring to avoid direct contact between the metal surfaces of the piston and the cylinder, even in case of lateral forces acting on the actuator stem. The grease in the annular cavity keeps the metal parts lubricated during piston movement allowing very smooth sliding and a long seal life.