IMI STI S.r.l. products

Linear Actuators - SC Series

IMI STI - Linear Damper Actuator

SC is a complete line of linear double acting pneumatic actuators purposely designed and manufactured for the operation of flow control devices such as dampers, louvres, butterfly and ball valves. Thanks to their design, they are ideal for applications in power plants, refineries, pipe works and on board vessels.

IMI STI - Linear Valve Actuator

SC/V pneumatic linear piston actuators are designed to drive control valves for the most demanding applications of Power and Oil & Gas Industries, such as turbine bypass, stem conditioning valves, desuperheaters, valve compressors antisurge and many other. Thanks to the special patented design of piston, including a double rings guiding system and a grease channel providing continuous lubrification, these actuators grant smooth and precise valve operation without any maintenance for whole operating life. This series of actuators are designed with patented plug-in connection system for a wide range of customer-tailed accessories and control system to meet the most demanding and critical operating conditions.

Quarter Turn Actuators - RT Series

IMI STI - Scotch Yoke Pneumatic Actuator

RTQ single/double acting pneumatic actuators, are suitable for the operation of quarter turn valves (ball valves, butterfly valves and plug valves) for on-off and modulating heavy-duty service.

IMI STI - Scotch Yoke Hydraulic Actuator

RTQH is a range of high torque hydraulic quarter turn actuators with materials selected to withstand the most hostile environmental conditions. They are suitable for all onshore and offshore applications, covering the majority of on-off and modulating valves. The actuator is designed to provide maximum reliability and flexibility to cover a wide range of valves in all pressure classes.

IMI STI - Scotch Yoke Pneumatic Actuator

RTC single/double acting pneumatic actuators, are suitable for the operation of quarter turn valves (ball valves, butterfly valves and plug valves) for on-off and modulating heavy-duty service.

Control Drive Enclosed Actuators - CM Series

IMI STI - Control Drive Enclosed Actuator

CML pneumatic actuator system consists of an actuator and a manual override integrated into a steel housing which is also a portable structure. This rugged construction guarantees continuous operation in harsh environments, for example in power stations, steel industries, petrochemical plants, desert areas. This actuator is able to control final elements like dampers, butterfly valves, speed variators, radial vanes, providing torque up to 100 daNm. 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.

IMI STI - Control Drive Enclosed Actuator

CMV pneumatic actuator system consists of an actuator and a manual override integrated into a steel housing which is also a portable structure. This rugged construction guarantees continuous operation in harsh environments, for example in power stations, steel industries, petrochemical plants, desert areas. This actuator is able to control final elements like dampers or hydraulic converters with high power actuators. The housing provides a double function of protection and a bearing frame. The engaging of the manual control is made automatically or manually through a dedicated switch.

Stepper Motor Actuators - SM Series

IMI STI - Stepper Motor Actuator

SM series has two actuators, hydraulic (SM/H) or pneumatic (SM/P), driving the stepper motor internal mechanism (clockwise and anticlockwise rotation), thus allowing the linear movement of the valve threaded stem in closing or opening direction. This actuator is tipically mounted on choke valves.

Positioners - PT Series

IMI STI - Digital-Pneumatic Valve Positioner with High Capacity and Precision Control

SHP is a high-capacity and high-precision digital-pneumatic positioner, mainly used as valve care controller. Its flow rate, the highest on the market, and its control algorithm system and logic, patented by STI, guarantee unique dynamic performances and very low stroking time at the same time. Advanced diagnostic (On-Line & Off-Line) developed to meet all customer needs.

IMI STI - Dynamic Performance Positioner for Double and Single Acting Actuators

FT FasTrak is a high-capacity, high-precision digital-pneumatic valve controller that replaces a conventional positioner. It has an excellent dynamic performance and high flow (CV=2). Configuration and calibration is carried out with a HART device or by self calibration. This product is compatible with double and single acting actuators, with or without a spring, piston or diaphragm actuators.