Scotch Yoke Pneumatic Actuator
WEISSMILLER WPA-G Series Scotch Yoke Pneumatic Actuator is a heavy-duty actuator designed for reliable quarter-turn valve automation. It is suitable for ball valve, butterfly valve, plug valve, and other 0°–90° rotary valve applications.
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Product Overview
The WPA-G Series Scotch Yoke Pneumatic Actuator is engineered for heavy-duty valve automation requiring high torque output, stable operation, and long service life. Its scotch yoke mechanism provides efficient torque transmission for quarter-turn valve operation.
Available in Double Acting and Spring Return configurations, this actuator can be used for on-off or modulating control applications. It is suitable for demanding industrial sectors such as oil and gas, petrochemical, power plant, water treatment, mining, marine, and general process industries.
Key Features
Scotch Yoke Design
Provides efficient torque transmission for 0°–90° quarter-turn valve operation.
Heavy-Duty Performance
Designed for high-torque industrial valve automation and demanding operating conditions.
Double Acting & Spring Return
Available in DA and SR configurations to match process and fail-safe requirements.
Weatherproof Construction
Suitable for indoor and outdoor installation with reliable protection for harsh environments.
Accessory Compatible
Can be integrated with solenoid valve, limit switch box, positioner, and manual override.
ISO Mounting Standard
Mounting interface follows ISO 5211 standard for valve automation compatibility.
Technical Specification
| Item | Specification |
|---|---|
| Product Type | Scotch Yoke Pneumatic Actuator |
| Series | WPA-G Series |
| Actuator Type | Heavy-Duty Quarter-Turn Actuator |
| Action Type | Double Acting / Spring Return |
| Valve Compatibility | Ball Valve, Butterfly Valve, Plug Valve, Quarter-Turn Valve |
| Air Supply | 3.5 – 7 bar |
| Working Pressure | 3 – 7 bar |
| Design Pressure | Maximum 10 bar |
| Standard Temperature | -20°C to +80°C |
| Optional Temperature Range | Low Temperature / High Temperature Configuration by Request |
| Mounting Standard | ISO 5211 |
| Accessories | Solenoid Valve, Limit Switch Box, Positioner, Manual Override, High Visibility Indicator |
Available Configuration
Double Acting Type
Uses air pressure to operate both opening and closing strokes for stable automated operation.
Spring Return Type
Designed with spring return function for fail-open or fail-close safety requirement.
Manual Override Option
Available with screw rod manual, bevel gear manual, or hydraulic manual override option.
Applications
Related Products
Ball Valve
Quarter-turn valve suitable for automated on-off operation with pneumatic actuator.
Butterfly Valve
Compact quarter-turn valve commonly combined with pneumatic actuator systems.
Limit Switch Box
Valve position monitoring accessory for open and close feedback indication.
Need Scotch Yoke Pneumatic Actuator?
Contact our technical sales team for actuator selection, valve automation support, and quotation.
Contact UsProduct Catalogue
Download the official WEISSMILLER WPA-G Series Scotch Yoke Pneumatic Actuator catalogue for technical details, configuration options, accessories, and dimensional information.
Download Catalogue