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IMI STI
RTQH - Hydraulic Scotch Yoke Quarter Turn Actuator
High torque hydraulic quarter-turn actuators for harsh environments.
Constructed with durable carbon steel and a fully sealed weatherproof housing, they ensure resilience in harsh environments.
A modular design supports double-acting or spring-return models with Scotch yoke mechanisms for precise and reliable control.
Nickel-plated cylinders and bronze alloy bushings minimise friction and wear, enhancing operational longevity and reducing maintenance.
Features
The RTQH Series hydraulic quarter-turn actuators deliver high torque and reliable operation for onshore and offshore valves, including on/off and modulating applications. With a modular design, they are available as double-acting or spring-return models and feature a fully sealed weatherproof housing for total protection. Constructed from durable carbon steel, they resist corrosion even in harsh environments. A Scotch yoke mechanism, available in canted or symmetrical configurations, ensures precise control with chromium-plated guide bars and bronze alloy bushings. Nickel-plated cylinders minimise friction, while strategically placed lifting lugs enable safe handling. A NAMUR drive slot and ISO 5211 flange ensure system compatibility.
Key features
Carbon steel weatherproof housing
Modular double-acting or spring-return options
Canted or symmetrical Scotch yoke mechanism
Nickel-plated cylinders for reduced friction
Bronze alloy bushings for durability
Lifting lugs for safe installation
ISO 5211 flange and NAMUR compatibility
Specifications
Ambient Temperature (°C)
-30 to 100
Manual Override
Yes
Cylinder Diameter (mm)
265
265
Material
Stainless Steel
Carbon Steel
Design Type
Single Acting
Double Acting
Operating Pressure (bar)
350 to undefined
Supply Medium
Hydraulic Oil
Fire Resistant Fluid
Rotary Movement (°)
90
Certification
PED
ATEX
MACHINERY DIRECTIVE
IP66/67M
SIL3
EAC (TR TS)
Resources
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