AERO2 A2S-110-11-V Pneumatic Rotary Actuator Spring Fail Closed 120

( Manufacturer Part Number: A2S-110-11-V ), ( Model: AERO2 A2S-110-11-V ), ( Part Type: Pneumatic Actuator Spring )

Review AERO2 Pneumatic Rotary Actuator Spring Return Fail Closed 120 Psi

The **Aero2 A2S-110-11-V Pneumatic Rotary Actuator (Spring-Fail Closed, 120 )** is a high-performance, precision-engineered valve actuator designed to deliver reliable and efficient operation in demanding industrial, HVAC, and process control applications. Engineered with a robust **110mm (4.33-inch) bore size**, this actuator provides ample torque capacity to handle heavy-duty valve movements while maintaining smooth, consistent performance across its full 120-degree rotation range. The **spring-fail-safe design** ensures critical fail-closed functionality, making it an ideal choice for safety-critical systems where valve closure is non-negotiable in the event of air supply failure or actuator malfunction. Constructed from **high-grade aluminum alloy**, the housing is both lightweight and durable, resistant to corrosion and environmental wear, while the internal components feature **stainless steel shafts and seals** to enhance longevity and reduce maintenance requirements.

This actuator operates on standard **120/240V AC or 120/230V DC** control signals, offering versatile integration with existing automation systems, PLCs, or manual override mechanisms. The **pneumatic operation** is powered by compressed air (typically 80 100 PSI), delivering rapid response times and precise positioning with minimal hysteresis. The **120 rotation** is optimized for quarter-turn valves, such as ball, butterfly, or plug valves, ensuring seamless alignment with standard valve mechanisms. The actuator s **modular design** allows for easy installation and adjustment, with features like **quick-connect fittings** for air supply lines and **adjustable torque settings** to accommodate varying valve resistance. Additionally, the **low-friction bearing system** minimizes wear and extends service life, while the **sealed housing** protects internal components from dust, moisture, and contaminants, making it suitable for both indoor and outdoor applications.

For enhanced reliability, the A2S-110-11-V incorporates **fail-safe spring return mechanics**, ensuring the valve defaults to a closed position when air pressure is lost, thus preventing unintended flow or system failures. The actuator s **compact yet sturdy construction** allows for flexible mounting orientations, including horizontal, vertical, or angled installations, while its **low-profile design** maximizes space efficiency in tight valve chambers. Built to meet stringent industry standards, including **NEMA 4X and IP66/IP67 ratings**, this actuator is well-suited for harsh environments such as chemical processing plants, water treatment facilities, and commercial HVAC systems. Whether used in emergency shutdown scenarios, process automation, or critical infrastructure control, the Aero2 A2S-110-11-V delivers **consistent, dependable performance** with minimal downtime, making it a premium choice for engineers and operators demanding both precision and safety in their valve actuation systems.

### **Pros and Cons of buying a Aero2 A2S-110-11-V Pneumatic Rotary Actuator (Spring-Fail Closed, 120 )**

1. **Reliability in Fail-Safe Applications** The spring-fail-closed design ensures the actuator returns to a safe position if pneumatic pressure is lost, making it ideal for critical systems where default safety is required (e.g., industrial valves, emergency shutdowns).

2. **Compact and Lightweight** The A2S-110 series is designed for space-constrained applications, allowing for easier integration into machinery without excessive bulk.

3. **High Torque Output** With a 120 rotation and a robust pneumatic drive, it provides sufficient torque for moderate to heavy-duty applications, such as valve actuation or positioning systems.

4. **Durability and Longevity** Aero2 actuators are known for their sturdy construction, often featuring corrosion-resistant materials and sealed internals to withstand harsh environments (dust, moisture, temperature fluctuations).

5. **Standardized Mounting** Compatible with common flange or shaft mounting options, reducing customization costs and installation time.

6. **Energy Efficiency** Pneumatic actuators are generally more energy-efficient than hydraulic ones in many applications, especially when paired with efficient compressors.

7. **Low Maintenance** Fewer moving parts compared to electric actuators, and the spring mechanism reduces reliance on external power for fail-safe operation.

8. **Compatibility with Existing Systems** Works seamlessly with standard pneumatic control systems (e.g., solenoid valves, PLCs), making retrofitting easier.

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1. **Dependence on Pneumatic Supply** Requires a consistent and clean air supply; fluctuations in pressure or contamination can affect performance or lead to premature wear.

2. **Limited Rotation Range** At 120 , it may not be suitable for applications requiring full 360 rotation or precise incremental positioning.

3. **Potential for Leakage** Over time, seals and O-rings can degrade, leading to air leaks, which may require periodic maintenance or replacement.

4. **Noise and Vibration** Pneumatic actuators can generate noise and vibration, which may be problematic in sensitive environments (e.g., cleanrooms, precision machinery).

5. **Higher Initial Cost for Complex Systems** While the actuator itself may be cost-effective, integrating it into a fully pneumatic control system (compressors, filters, regulators) can add upfront expenses.

6. **Temperature Sensitivity** Extreme temperatures (very high or low) can affect the performance of seals, springs, and pneumatic media, potentially reducing lifespan.

7. **Less Precision Than Electric Actuators** Pneumatic systems may lack the fine control achievable with servo-driven electric actuators, though this is less critical for on/off or binary applications.

8. **Limited Customization** Unlike some electric or hydraulic actuators, customizing stroke length, speed, or force curves may require additional components or modifications.

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The **Aero2 A2S-110-11-V** is a well-suited choice for applications where **fail-safe operation, compact design, and moderate torque** are prioritized over precision or full rotation. It excels in industrial, manufacturing, or automation settings where pneumatic systems are already in place and reliability in power loss scenarios is critical. However, it may not be the best fit for applications requiring **high precision, continuous rotation, or extreme environmental conditions** without additional safeguards.

- You need a **spring-fail-closed** solution for safety-critical applications (e.g., emergency valve closure).

- Your system is **pneumatic-based**, and you require a **compact, durable** actuator for moderate torque tasks.

- Cost efficiency and **low maintenance** are key factors in your decision.

- You require **full 360 rotation** or **high-precision positioning** (electric or hydraulic actuators may be better).

- Your environment involves **extreme temperatures, high vibration, or corrosive conditions** without proper shielding.

- You lack a **reliable pneumatic supply system** (e.g., inconsistent air pressure, poor filtration).

- Noise or vibration is a significant concern (consider electric or hydraulic alternatives).

For best results, pair this actuator with a **high-quality pneumatic control system** (compressor, filters, regulators) and perform **regular maintenance** to ensure longevity. If unsure, consult with Aero2 s technical support or a system integrator to verify compatibility with your specific application.

Details:

See photos for exact condition. Used AERO2 pneumatic spring return rotary actuator in good condition. Sold as pictured. Removed from an industrial valve automation setup.

part #: a2s11011 price

• $300.00

specifications linactuat:

• mpn: A2s-110-11-v
• model: Aero2 A2s-110-11-v
• part type: Pneumatic Actuator Spring

returns linactuat:

• policy: No Returns

payments linactuat:

• credit card: Visa
• wallet: Paypal
• other

shipping linactuat:

• transit: 5-11 Days
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• cost: $34.05
• type: Calculated

general linactuat:

• condition: Used
• Industrial Automation Motion Controls > Rotary Linear Motion > Rotary Actuators

offer linactuat:

• availability: In Stock
• quantity: 7
• sold: 0
• options: Ship-to-home
• started: May 7, 2026

seller linactuat:

• rating: 100.0%
• # reviews: 13
• city: Shawnee, Oklahoma

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