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IMI STI
RTQ - Pneumatic Scotch Yoke Quarter Turn Actuator
High torque pneumatic quarter-turn actuators for harsh environments.
Featuring rugged carbon steel housing and a sealed weatherproof design, it ensures durability in harsh environments.
Modular options include double-acting or spring-return designs with flexible Scotch yoke mechanisms for enhanced adaptability.
Nickel-plated cylinders minimise friction and corrosion, offering long-lasting operation with low maintenance requirements.
The RTQ actuator delivers high torque and reliable performance for onshore and offshore applications, including on/off and modulating valves. Designed to withstand harsh environments, it features a durable carbon steel housing and a fully sealed weatherproof design to protect moving parts. Available as double-acting or spring-return, its Scotch yoke mechanism offers both canted and symmetrical options for flexibility. Chromium-plated components and electroless nickel-plated cylinders minimise friction and resist corrosion, ensuring long-lasting operation. Strategically placed lifting lugs provide safe handling, while a position indicator with NAMUR drive slot and ISO 5211 flange ensures compatibility with various systems.
Key features
Sealed weatherproof housing for durability
Modular double-acting or spring-return options
Carbon steel construction resists wear
Bronze bushings absorb transverse force
Nickel-plated cylinders reduce friction
NAMUR/ISO standard compatibility
Lifting lugs for safe installation
Specifications
Supply Medium
Air
Nitrogen
Sweet Gas
Sour Gas
Material
Stainless Steel
Carbon Steel
Design Type
Single Acting
Double Acting
Operating Pressure (bar)
12 to undefined
Ambient Temperature (°C)
-30 to 100
Cylinder Diameter (mm)
935
935
Rotary Movement (°)
90
Manual Override
Yes
Certification
PED
ATEX
MACHINERY DIRECTIVE
IP66/67M
SIL3
EAC (TR TS)
Documents
Brochure
IMI STI_Product Brochure_RTQ_Actuator.pdf
2.07MB
English
Certification
IMI STI IECEx.pdf
260.74kB
English
IMI STI ATEX.pdf
194.02kB
English
IMI STI PER Module H.pdf
428.94kB
English
IMI STI PED Module H.pdf
347.42kB
English
IMI_CCI_Korea_ISO_9001_2015_26Jun26.pdf
246.85kB
English
IMI STI PED Module H1.pdf
348.07kB
English
IMI STI PER Module H1.pdf
429.52kB
English
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