Heavy Duty Scotch Yoke Pneumatic Actuator
Heavy Duty
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ISO 5211
NAMUR
1M+ Cycles
Pneumatic Actuators
Heavy Duty Scotch Yoke Pneumatic Actuator
High-torque scotch yoke pneumatic & hydraulic actuators designed for large-bore pipeline valves, ESD applications, and extreme industrial services.
Torque Range
Up to 130,000 Nm
Supply Pressure
3.0 – 10.0 Bar Pneumatic / 210 Bar Hydraulic
Working Temperature
-20°C to +80°C (Optional -50°C to +150°C)
Heavy Duty Scotch Yoke Pneumatic Actuator
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Product Overview & Operating Principles
Huaji Scotch Yoke actuators produce high breakaway torque at the beginning and end of each stroke, matching the torque curve of ball and butterfly valves perfectly. Available in symmetric and canted yoke configurations for double acting and spring return safety failsafe applications.
Key Engineering Advantages:
High starting and ending torque matching quarter-turn valve characteristics
Heavy duty carbon steel welded cylinder with chrome-plated bore
Modular power cylinder, spring cartridge, and center body design
Emergency Shutdown (ESD) and safety instrumented systems (SIL 3 rated)
Manual hydraulic override and declutchable manual gearbox options
IP67 / IP68 fully sealed weatherproof enclosure
Technical Drawings & Blueprints
High-definition sizing charts, torque curves, and structural schematics.
Standard Technical Specifications
| Parameter | Huaji Standard Specification |
|---|---|
| Actuator Type | Scotch Yoke Mechanism (Symmetric / Canted) |
| Output Torque | Up to 130,000 Nm |
| Operating Medium | Clean Compressed Air or Hydraulic Fluid |
| Working Pressure | Pneumatic: 3-10 Bar | Hydraulic: up to 210 Bar |
| Failsafe Mode | Spring Return (Fail Close / Fail Open) |
| Cylinder Bore | Up to 1,200 mm |
| Enclosure Rating | IP67 / IP68 submersible |
| Certification | ATEX 2014/34/EU, CE, SIL3, ISO9001 |
Inquire About This Product
Specify your size, torque requirements, or quantity for a fast quote within 12 hours.