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IMI STI
RTCH - Hydraulic Scotch Yoke Quarter Turn Actuator
Compact hydraulic quarter-turn valve actuators for harsh environments.
Modular design supports double-acting or spring-return configurations for flexible valve operation.
Weatherproof carbon steel housing and Scotch yoke with chromium-plated guide bars ensure durability in harsh conditions.
Nickel-plated cylinders reduce friction and corrosion for long-lasting, low-maintenance performance.
The RTC pneumatic actuator series ensures reliable operation of quarter-turn valves, including ball, butterfly, and plug valves, for heavy-duty on-off and modulating applications. Featuring a waterproof Scotch yoke mechanism, it converts linear movement into rotary motion for precise valve control. Its weatherproof carbon steel housing protects moving parts in harsh environments, while electroless nickel-plated cylinders minimise friction and resist corrosion. Available in canted or symmetrical configurations, it includes chromium-plated guide bars and PTFE-filled steel bronze bushings for durability. Certified lifting lugs ensure safe handling, and the safety design allows secure cylinder seal replacement. ISO 5211 flange compatibility included.
Key features
Carbon steel weatherproof housing
Double-acting or spring-return configurations
Canted or symmetrical Scotch yoke mechanism
Nickel-plated cylinders minimise friction
Bronze bushings for durability
ISO 5211 and NAMUR compatible
Certified lifting lugs for safe handling
Specifications
Supply Medium
Hydraulic Oil
Fire Resistant Fluid
Material
Stainless Steel
Carbon Steel
Design Type
Single Acting
Double Acting
Operating Pressure (bar)
350 to undefined
Ambient Temperature (°C)
-30 to 100
Cylinder Diameter (mm)
50
50
Rotary Movement (°)
90
Manual Override
Yes
Certification
PED
ATEX
MACHINERY DIRECTIVE
IP66/67M
SIL3
EAC (TR TS)
Documents
Brochure
IMI STI_Product Brochure_RTCH__Actuator.pdf
1.45MB
English
Certification
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
IMI STI IECEx.pdf
260.74kB
English
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