Flow Control
IMI STI Series RTC Actuators
Scotch Yoke Pneumatic Low Pressure Actuators
The RTC single/double acting pneumatic low-pressure actuators,are suitable for the operation of quarter turn valves for on-off and modulating heavyduty service.
IMI STI RTC Actuator Features
- Double Acting or Spring Return
Compact Design - Full Stainless Steel Version
Available on Request
IMI STI Other Series
Detail Specification
| Operating Pressure | Up to 12 Bar |
| Output Torque | From 40 Nm up to 6.000 Nm For Double Acting Version |
| Operating Temperature | -30°C to 100°C (high/low Temperature Design Available ON Request) |
IMI STI Pneumatic
Valve Actuators
IMI STI SC/V Pneumatic
Valve Actuators
Our pneumatic linear piston actuators are designed to drive control valves for the most demanding applications in the power and oil & gas industries.
IMI STI SC/V Features
- Several strokes available
- Carbon steel bodies for larger sizes
- Double guide for piston and bushing
IMI STI Other Series
Detail Specification
| Operating Pressure | Pneumatic version up to 10 bar (design up to 12 bar) |
| Operating Temperature/td> | -20°C to 70°C (lower or higher temperature on request) |
| Standard Pneumatic Supply Medium | Air, nitrogen or sweet gas (special version for sour gas on request) |
IMI STI Pneumatic
Valve Actuators
IMI STI SC/V Pneumatic
Valve Actuators
Our pneumatic linear piston actuators are designed to drive control valves for the most demanding applications in the power and oil & gas industries.
IMI STI SC/V Features
- Several strokes available
- Carbon steel bodies for larger sizes
- Double guide for piston and bushing
IMI STI Other Series
Detail Specification
| Operating Pressure | Pneumatic version up to 10 bar (design up to 12 bar) |
| Operating Temperature/td> | -20°C to 70°C (lower or higher temperature on request) |
| Standard Pneumatic Supply Medium | Air, nitrogen or sweet gas (special version for sour gas on request) |
IMI STI Actuation Accessories
IMI STI Air Lock 101 Device Actuation Accessories
The Air-Lock Pressure Static Device is Composed of a TP Pneumatic Pressure Switch Combined With 2 x 3 way Valves ND 1/4” in a Single Body.
IMI STI AL Features
- Single and double acting actuators
- Standard, offshore, sandstorm and copper-free ambient conditions.
IMI STI AL Other Series
Detail Specification
| Pilot signal connection | 1/8” NPT |
| Output connections | 1/4” NPT |
| Operating temperature | -20ºC to 70ºC (-4ºF to 158ºF) -40ºC to 70ºC (-40ºF to 158ºF) -20ºC to 85ºC (-4ºF to 185ºF) |
IMI STI Actuation Accessories
IMI STI AV: Volume Booster Actuation Accessories
Produces a high volume boosting action and contains an integral stabilizing by-pass valve controlled by a screwdriver adjustment
in the body.
IMI STI AV Features
- Suitable for standard, offshore, sandstorm and copper-free ambient conditions
- Single and double acting actuators
- Low and high ambient temperature
IMI STI AV Other Series
Detail Specification
| Size | 2" to 54" (50 mm to 1350 mm) |
| ASME Class | class 150 to 2500 |
| Design Standard | API 600, ASME B16.34, BS 6364, ISO 28921 |
IMI STI Actuation Accessories
IMI STI AV: Volume Booster Actuation Accessories
Produces a high volume boosting action and contains an integral stabilizing by-pass valve controlled by a screwdriver adjustment
in the body.
IMI STI AV Features
- Suitable for standard, offshore, sandstorm and copper-free ambient conditions
- Single and double acting actuators
- Low and high ambient temperature
IMI STI AV Other Series
Detail Specification
| Size | 2" to 54" (50 mm to 1350 mm) |
| ASME Class | class 150 to 2500 |
| Design Standard | API 600, ASME B16.34, BS 6364, ISO 28921 |
IMI STI Series BV
Actuation Accessories
IMI STI BIG Volume
Booster Actuation
The Big Volume Booster (model BV) is designed to meet high speed control applications.
IMI STI BV Features
- Standard, offshore, sandstorm and copper-free ambient conditions.
- Single and double acting actuators.
- Low and high ambient temperature
- Unique high value of CV in one device
IMI STI BV Other Series
Detail Specification
| Housing materials | Painted RAL 7001 aluminium Stainless steel 316 |
| Pilot signal connection | 1/2” NPT |
| Output connections | Manifold mounting |
IMI STI Series TP
Actuation Accessoris
IMI STI Pneumatic Pressure Switch Actuation Accessoris
The Pneumatic Pressure Switch (model TP) device has been designed to drive lock-up devices to the safety shut down position.
IMI STI TP Features
- Single and double acting actuators
- Low and high ambient temperature
- Accurate pressure setting
- Insensitive to vibrations
IMI STI TP Other Series
Detail Specification
| Housing materials | Anodized aluminum Stainless steel 316 |
| Operating temperature | 20°C / +70°C -40°C / +70°C available on request -20°C / +85°C available on request |
| Pilot signal connection | 1/8” NPT |
IMI STI Series TP
Actuation Accessoris
IMI STI Pneumatic Pressure Switch Actuation Accessoris
The Pneumatic Pressure Switch (model TP) device has been designed to drive lock-up devices to the safety shut down position.
IMI STI TP Features
- Single and double acting actuators
- Low and high ambient temperature
- Accurate pressure setting
- Insensitive to vibrations
IMI STI TP Other Series
Detail Specification
| Housing materials | Anodized aluminum Stainless steel 316 |
| Operating temperature | 20°C / +70°C -40°C / +70°C available on request -20°C / +85°C available on request |
| Pilot signal connection | 1/8” NPT |
IMI STI Positioner
IMI STI SA/CL Positioner
The SA/CL is an analog positioner available in a pneumatic and electro-pneumatic version, The positioner has a heavy duty design making it suitable for use in very harsh conditions.
IMI STI SA/CL Features
- Metallic case
- Full stainless steel spool valve for ND 1/2”
- Available full stainless steel spool valve for ND 1/4”
- Sandstorm execution.
IMI STI SA/CL Other Series
Detail Specification
| Housing Materials | Aluminum |
| Operating Temperature | -20°C / +70°C |
| Pilot Signal Connection | 1/4” NPTF |
IMI STI Positioner
IMI STI SR/CCK Positioner
The SR/CCK is specifically designed for the proportional quarter-turn operation for the actuation of butterfly, plug, ball valves, etc. It can be also used on linear actuators using a specific bracket.
IMI STI SR/CCK Features
- Split range signal
- Visual position indicator
- Single and double acting actuators
- Metallic case
- Special characterisation/range
- Low and high ambient temperature
IMI STI SR/CCK Other Series
Detail Specification
| Housing materials | |
| Operating temperature | -20°C / +70°C |
| Sensitivity | 0.25% of full range |
IMI STI Positioner
IMI STI SR/CCK Positioner
The SR/CCK is specifically designed for the proportional quarter-turn operation for the actuation of butterfly, plug, ball valves, etc. It can be also used on linear actuators using a specific bracket.
IMI STI SR/CCK Features
- Split range signal
- Visual position indicator
- Single and double acting actuators
- Metallic case
- Special characterisation/range
- Low and high ambient temperature
IMI STI SR/CCK Other Series
Detail Specification
| Housing materials | |
| Operating temperature | -20°C / +70°C |
| Sensitivity | 0.25% of full range |
IMI STI Zero Backlash
Scotch Yoke Mechanism for RT Series
Historically, quarter turn valves have been used almost exclusively for on–off applications. More recently however, the need for use in regulation processes is increasing.
IMI STI ZB Features
- Avoid increase in dynamic and static friction
- Avoid any possible unwanted movement between different parts
IMI STI ZB Other Series
IMI STI Positioner
IMI STI DE/3M-3 Positioner
The DE/3M-3 is an analog positioner available in a pneumatic and electro-pneumatic version. The positioner has a heavy duty design making it suitable for use in very harsh conditions.
IMI STI DE/3M-3 Feature & Benefits
- Feedback system lever/arm free
- Split range signal
- Low and high ambient temperature
- High reliability
- Single and double acting actuators
- Standard, offshore, sandstorm, copper free ambient condition
- The DE/3M-3 is designed to be used for applications on linear actuators with a stroke length of up to 300mm
Detail Specification
| Housing materials | Anodized Aluminum |
| Static air consumption | 0.4 Nm3/h (0.25 SCFM) at 400kPa (60 psi) |
| Sensitivity | 0.2% of signal range |
IMI STI Positioner
IMI STI DE/3M-3 Positioner
The DE/3M-3 is an analog positioner available in a pneumatic and electro-pneumatic version. The positioner has a heavy duty design making it suitable for use in very harsh conditions.
IMI STI DE/3M-3 Feature & Benefits
- Feedback system lever/arm free
- Split range signal
- Low and high ambient temperature
- High reliability
- Single and double acting actuators
- Standard, offshore, sandstorm, copper free ambient condition
- The DE/3M-3 is designed to be used for applications on linear actuators with a stroke length of up to 300mm
Detail Specification
| Housing materials | Anodized Aluminum |
| Static air consumption | 0.4 Nm3/h (0.25 SCFM) at 400kPa (60 psi) |
| Sensitivity | 0.2% of signal range |
