Heavy Duty Scotch Yoke TypePneumatic Actuator single Acting
Operating Parameters Rotation angle: 0°~ 90° Output torque: Double action:600~260000Nm Spring restoration:600~100000Nm Operating pressure: Pneumatic drive:0.3~0.7Mpa Hydraulic drive: 20Mpa Operating temperature: Standard-20ºC~+80ºC High temperature-15ºC~+150ºC Low…
Feature：
This Autorun single-acting Scotch Yoke pneumatic actuator delivers 600–100,000Nm fail-safe torque for 90° valves (ball, butterfly, plug). It operates at 0.3–0.7MPa, with temperature ranges from -20°C to +150°C (custom low-temp available). The spring-return design guarantees safe valve positioning on air loss, making it ideal for critical emergency shutdown applications.
Our Workshop
1. Application Scenarios
This single-acting Scotch Yoke actuator is designed for on/off or proportional control of 90° quarter-turn valves in demanding industrial environments. Typical applications include:
Oil & Gas Pipelines: Emergency shut-off for high-pressure ball valves and plug valves.
Chemical & Refining: Safe operation of large-bore butterfly valves in corrosive, high-temperature media.
Power & Metallurgy: Control of flue gas and pulverized coal pipeline valves.
Water Treatment: On/off actuation for large-diameter butterfly valves.
Cryogenic & LNG: Specialized low-temperature service with compatible sealing materials.
2. Key Selection Parameters
|
Parameter |
Specification |
|
Rotation Angle |
0° ~ 90° |
|
Output Torque (Spring Return) |
600 ~ 100,000 Nm |
|
Operating Pressure (Pneumatic) |
0.3 ~ 0.7 MPa |
|
Operating Temperature (Standard) |
-20°C ~ +80°C |
|
Operating Temperature (High Temp) |
-15°C ~ +150°C |
|
Connection Standard |
ISO 5211 flange interface, NAMUR accessory mounting |
|
Material |
Cylinder: Carbon steel / Ductile iron; Piston/Yoke: Alloy steel; Seals: FKM / PTFE |
|
Protection Rating |
IP67 (IP68 optional), ATEX/IECEX explosion-proof certification available |
3. FAQ
Q: How to extend service life?A: Use clean, dry air (filter ≤5μm), replace seals regularly, avoid over-torque operation, and use temperature-appropriate lubricants.
Q: Is it compatible with non-90° valves?A: Standard stroke is 0°~90°; custom stroke angles (e.g., 0°~120°) are available upon request.
Q: What hazardous areas is it suitable for?A: Explosion-proof models with ATEX II 2G Ex d IIC T6 certification are approved for Zone 1/2 explosive gas environments.
4. Compatible Valves
Ball Valves: Trunnion-mounted, floating, and metal-seated ball valves.
Butterfly Valves: Triple-offset, double-offset, and large-bore ventilation butterfly valves.
Plug Valves: Oilfield plug valves and high-pressure 3-way plug valves.
Other 90° Valves: Dampers, louver valves, and special rotary valves.
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