High-performance quarter-turn pneumatic actuator designed for reliable and precise operation of ball valves, butterfly valves, dampers and other rotary equipment.
The rack and pinion pneumatic actuator provides dependable rotary actuation for industrial valve automation. Its compact construction, standardized mounting and broad operating range make it suitable for demanding applications across oil & gas, water treatment, power, chemical, pharmaceutical and food processing industries.
| ACTUATOR TYPE | Rack & pinion |
| SIZE RANGE | 40 to 400 mm |
| OPERATING TYPE | Double and single acting |
| WORKING PRESSURE | 1 to 8 bar |
| MAX OPERATING PRESSURE | 8 bar* *For higher pressure application consult Duncan |
| TORQUE RANGE | Up to 9523 Nm |
| TEMPERATURE RANGES |
General: -20 °C to +80 °C High: -20 °C to +125 °C Arctic: -60 °C to +80 °C |
| MOUNTING INTERFACE | ISO 5211, VDI/VDE 3845 |
| CERTIFICATION |
IP 66 & 67 ATEX 2014/34/EU CE SIL 3 Proof of design as per BS EN 15714-3 |
| LUBRIATION REQUIREMENT | Pre-lubricated, typically maintenance free |
| ROTATION | Quarter turn (Stroke adjustment ±5° in both directions) |
| CORROSION RESISTANCE | Yes (due to anodized aluminium) |
| APPLICATION | Operating for ball & butterfly valves, dampers, etc. |
| END USERS | Oil & gas, water treatment, power, chemical, pharmaceutical, food processing, etc |
The Scotch & Yoke Pneumatic Actuator is designed to deliver dependable quarter-turn operation for industrial valves and dampers. Its robust construction combines high torque output with reliable operation in demanding environments.
Available in double-acting and single-acting configurations, the actuator can be configured for fail-safe applications and a wide range of operating conditions.
| ACTUATOR TYPE | Scotch yoke |
| SIZE RANGE | Frame size S1 to S5 & cylinder bore 200 to 800 mm |
| OPERATING TYPE | Double and single acting |
| WORKING PRESSURE | 1 to 8 bar |
| MAX OPERATING PRESSURE | 8 bar* *For higher pressure application consult Duncan |
| TORQUE RANGE | Up to 50000 Nm |
| TEMPERATURE RANGES |
Normal temp. range: -20° to +80 °C High temp. range: -20° to +125 °C Low temperature range: -45° to +80 °C |
| MOUNTING INTERFACE | ISO 5211, VDI/VDE 3845 |
| CERTIFICATION |
IP 66 & 67 ATEX 2014/34/EU PED 2014/68/EU CE SIL 3 Proof of design as per BS EN 15714-3 |
| ROTATION | Quarter turn (Stroke adjustment ±5° in both directions) |
| CONTROL OPTIONS | Regulating, on/off |
| APPLICATION | Operating for ball & butterfly valves, dampers, etc. |
| END USERS | Oil & gas, water treatment, power, chemical, pharmaceutical, food processing, etc |
Designed for dependable performance in demanding industrial applications.
Space-saving construction allows easy installation in compact equipment layouts.
Stable power delivery supports reliable valve movement throughout operation.
Pneumatic actuation provides quick opening and closing times.
Accurate positioning and quarter-turn control for dependable operation.
Robust construction delivers dependable performance and long service life.
Pre-lubricated design is typically maintenance free.
The rack and pinion pneumatic actuator is suitable for a wide range of industrial valve and damper automation applications.
