KOEI INDUSTRY CO UNIC-20 Electric Rotary Valve Actuator Co. Ltd. UA-20 AC115V

( Brand: Koei Industry Co ), ( Manufacturer Part Number: UNIC-20 ), ( Part Type: Valve Actuator ), ( Voltage: 120v ), ( Actuation Force: 196.1 N M ), ( Country Of Origin: Japan )

Review KOEI INDUSTRY CO Co. Ltd. Electric Rotary Valve Actuator Japan Parts Only

The **KOEI LTD UNIC-20 UA-20 Electric Rotary Valve Actuator (AC 115V)** is a high-performance, precision-engineered actuator designed to deliver reliable and efficient control over rotary valve operations in industrial, commercial, and automation applications. Built with robust construction and a compact yet durable design, this actuator is engineered to handle demanding environments where consistent and accurate positioning is critical. Powered by a clean 115V AC supply, it offers seamless integration into existing electrical systems, ensuring compatibility with a wide range of control interfaces, including PLCs, smart sensors, and manual override mechanisms. The UNIC-20 features a 20-position rotary mechanism, providing precise angular adjustments with smooth, quiet operation, making it ideal for applications such as gas flow regulation, liquid distribution systems, or automated valve sequencing in HVAC, water treatment, or chemical processing plants.

At its core, the UA-20 actuator combines advanced mechanical engineering with intelligent electronic control, offering both manual and automatic operation modes for maximum flexibility. Its robust motor and gear reduction system ensure long-lasting durability, even under frequent cycling or high-torque demands, while the sealed housing protects internal components from dust, moisture, and corrosive elements, extending operational lifespan in harsh conditions. The actuator s compact footprint and modular mounting options allow for easy installation in tight spaces, whether integrated into a valve assembly or retrofitted into existing infrastructure. With a focus on energy efficiency, the UNIC-20 minimizes power consumption while maintaining high performance, reducing operational costs over time.

Safety and reliability are prioritized in its design, featuring built-in overload protection, short-circuit prevention, and a fail-safe mechanism to prevent unintended valve closure or opening. The actuator s digital feedback system provides real-time position confirmation, enabling precise monitoring and control via connected systems, while its user-friendly interface allows for easy programming and adjustment of rotation angles, speed, and sequencing. Whether deployed in a critical industrial process, a municipal water management system, or a specialized automation setup, the KOEI LTD UNIC-20 UA-20 delivers dependable performance with minimal maintenance requirements, making it a versatile and cost-effective solution for modern valve automation needs.

**Overview of the KOEI LTD UNIC-20 UA-20 Electric Rotary Valve Actuator (AC 115V)**

The KOEI UNIC-20 UA-20 is an electric rotary actuator designed for precise control of valve positions in industrial, HVAC, or automation systems. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **High Precision and Reliability**

The actuator is engineered for accurate positioning, with a repeatability of 1 and a positioning accuracy of 2 . This makes it suitable for applications requiring tight control, such as in fluid handling or automated systems where misalignment could cause inefficiencies or failures.

2. **Wide Voltage Range and Compatibility**

Operates on a standard AC 115V supply, which is widely available in industrial and commercial settings. This reduces the need for additional power conversion equipment, simplifying installation and maintenance.

3. **Durable Construction**

KOEI actuators are known for their robust build quality, often featuring corrosion-resistant materials and sealed internals to withstand harsh environments, including exposure to moisture, dust, and temperature fluctuations. The UNIC-20 model is likely designed for long-term reliability in demanding applications.

4. **Modular and Easy Integration**

The actuator is designed to be compatible with various valve types (e.g., butterfly, ball, or plug valves) and can be integrated into existing control systems via standard communication protocols (e.g., 4-20mA, digital signals, or PLC compatibility). This flexibility makes it adaptable to different automation setups.

5. **Low Maintenance Requirements**

Electric actuators like this one typically require less maintenance compared to pneumatic or hydraulic alternatives. They lack moving seals or fluid lines that can degrade over time, reducing downtime and repair costs.

6. **Energy Efficiency**

As an electric actuator, it avoids the energy losses associated with pneumatic or hydraulic systems. It also allows for precise control of energy usage, as it can be programmed to operate only when needed.

7. **Quiet Operation**

Electric actuators generally produce minimal noise compared to pneumatic actuators, which can be advantageous in environments where noise reduction is important (e.g., hospitals, offices, or residential areas).

8. **Remote and Automated Control**

The actuator can be controlled remotely via signals from PLCs, SCADA systems, or even smartphone apps (if integrated with modern IoT platforms). This enables full automation and monitoring of valve operations.

9. **Safety Features**

Many KOEI actuators include built-in safety features such as limit switches, overload protection, and fail-safe modes (e.g., fail-to-close or fail-to-open) to prevent accidents or system failures.

10. **Global Availability and Support**

KOEI is a well-established brand with a global presence, offering widespread availability of spare parts, technical support, and after-sales service. This can be crucial for long-term operational continuity.

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### **Cons**

1. **Higher Upfront Cost**

Electric rotary actuators, especially high-precision models like the UNIC-20, tend to be more expensive upfront compared to simpler mechanical or pneumatic alternatives. The cost may be justified by long-term savings, but it can be a barrier for small-scale or budget-constrained projects.

2. **Dependence on Electrical Power**

Unlike pneumatic or hydraulic actuators, electric actuators require a stable power supply. Power outages or voltage fluctuations can disrupt operations, potentially causing downtime. Backup power solutions (e.g., UPS) may be necessary in critical applications.

3. **Limited Torque at High Speeds**

While the UNIC-20 is designed for precision, high-speed applications may require additional consideration. Electric actuators can generate heat during prolonged or rapid operation, which might affect performance or require cooling solutions.

4. **Potential for Complex Installation**

Integrating an electric actuator into a system often requires wiring, programming, and calibration. This may necessitate specialized knowledge or hiring skilled technicians, adding to the overall project complexity and cost.

5. **Size and Space Constraints**

Electric actuators, depending on their design, may occupy more space than smaller pneumatic or manual actuators. In applications with tight installation constraints, this could be a limiting factor.

6. **Software and Programming Dependencies**

For advanced features (e.g., position feedback, automation sequences), the actuator may require compatible control software or PLC programming. This adds a layer of dependency on technical expertise and potential software licensing costs.

7. **Potential for Wear Over Time**

While electric actuators are generally low-maintenance, internal components such as gears, motors, or sensors can wear out with prolonged use. Regular inspections and eventual replacement of parts may be required to maintain optimal performance.

8. **Limited Suitability for Extreme Environments**

Although KOEI actuators are durable, extremely harsh conditions (e.g., high temperatures, corrosive chemicals, or high-pressure environments) may still pose challenges. Specialized models or additional protective measures may be needed.

9. **Compatibility Issues with Legacy Systems**

Older valve systems or control panels may not be compatible with modern electric actuators without modifications. Retrofitting could require additional engineering work and costs.

10. **Training Requirements**

Operators or maintenance personnel may need training to properly install, program, and troubleshoot the actuator, adding to the overall operational learning curve.

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### **Conclusion**

The KOEI LTD UNIC-20 UA-20 electric rotary valve actuator is a high-quality, precision-engineered device ideal for applications requiring reliable, automated, and energy-efficient valve control. Its strengths lie in its accuracy, durability, ease of integration with modern systems, and low maintenance requirements. These advantages make it particularly suitable for industrial automation, HVAC systems, water treatment plants, and other applications where precise fluid control is critical.

However, the higher initial cost, dependence on electrical power, and potential complexity of installation and programming may pose challenges, especially for smaller-scale or budget-sensitive projects. Additionally, applications with extreme environmental conditions or legacy systems may require additional considerations or modifications.

For most modern industrial or automation-driven applications where precision, reliability, and integration with control systems are priorities, the UNIC-20 UA-20 is a strong and justified investment. It strikes a balance between performance and practicality, making it a versatile choice for professionals in need of advanced valve actuation.

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### **Recommendation**

- You require high-precision valve control in an industrial, HVAC, or automation system.

- Your application benefits from remote or automated operation, and you have access to a stable electrical power supply.

- You prioritize long-term reliability, low maintenance, and compatibility with modern control systems (e.g., PLCs, SCADA).

- The upfront cost is justified by the actuator s performance, efficiency, and potential to reduce operational downtime or improve system accuracy.

- You have access to technical support or personnel capable of installing and programming the actuator.

- Your budget is severely constrained, and you can find a simpler or lower-cost actuator that meets your basic requirements.

- Your application involves extreme environmental conditions (e.g., very high temperatures, corrosive substances) that may not be fully addressed by the standard model.

- Your system lacks electrical infrastructure or requires frequent power outages, making backup solutions necessary.

- You are working with legacy systems that lack compatibility with electric actuators, and retrofitting would be prohibitively complex or expensive.

- Your application does not require high precision, and a manual or pneumatic actuator would suffice.

- For cost-sensitive applications: Pneumatic or hydraulic actuators, which may be cheaper but less precise and more maintenance-intensive.

- For extreme environments: Specialized electric actuators with enhanced corrosion resistance or temperature ratings from brands like Fisher, Masoneilan, or other industrial valve actuator manufacturers.

- For simple or temporary setups: Manual actuators or low-cost electric actuators with basic functionality.

In summary, the UNIC-20 UA-20 is a well-rounded choice for professionals seeking a balance of performance, reliability, and integration capabilities. Careful consideration of your specific application requirements will ensure that it is the right fit for your needs.

Details:

Sold strictly as-is. 19.8 lbs, Body Material Die-Cast Aluminum, Country of Origin Japan, Condition For Parts / Not Tested Operating condition unknown. Please review all photos carefully before purchasing. The unit runs on standard North American power AC 115 120V and is rated for 196.1 N m of torque.

Operating condition is unknown. Model Unic-20 / UA-20, Serial Number10040150 STD, Power Supply AC 115 120V, Frequency50 60 Hz, Torque196.1 N m, Current1.0 1.1A, Operating Time30 sec 50Hz 25 60Hz, Actuator Type Electric Rotary Quarter-Turn, 90 , Motor30W, E-class, Position Indicator Visual Dial Open Shut, Manual Override Crank handle attached, Enclosure Retaining-4X IP-65 Watertight, Dust-Tight, Ambient Temp Range-25 C to 55 13 F 131 F, Insulation Resistance100 M 500V DC, Withstand voltage 1500V AC 1 minute, Thermal Protector Built-in, Conduit Entry1/2 with resin connector, Mounting Angle Vertical Horizontal, Unit Weight9 kg approx. Serial #: 10040150. No functionality guaranteed.

It features a built-in visual position indicator open/shut dial gauge, manual override hand wheel port, limit switch housing, and robust cast housing. A QC PASSED inspection sticker is affixed to the unit and wiring harness with wire nut connections included. All serial numbers recorded. IMPORTANT: This unit has NOT been tested.

Please review all photos carefully and ask any questions before purchasing. Shipping Information Items are shipped via UPS or USPS using actual shipping cost calculation based on buyer location. A respected name in valve automation. Visually intact.

Made in Japan. This actuator is designed for quarter-turn rotary valve control in industrial pipeline systems including water treatment, HVAC, chemical processing, and similar applications.

part #: unic20 prices

• $95.00-$549.00

specifications linactuat:

• brand: Koei Industry Co
• mpn: Unic-20
• part type: Valve Actuator
• voltage: 120v
• actuation force: 196.1 N M
• country of origin: Japan

shipping linactuat:

• class: Economy, Standard
• carrier: UPS, USPS
• service: UPS Ground Saver, USPS Ground Advantage, UPS Ground
• type: Calculated
• transit: 5-11 Days
• cost: $35.87

offer linactuat:

• best offers: True
• sold: 0
• quantity: 1
• started: March 26, 2026
• options: Ship-to-home
• availability: In Stock

payments linactuat:

• wallet: Apple-pay
• other
• credit card: Discover

general linactuat:

• condition: For parts or not working
• Industrial Automation Motion Controls > Rotary Linear Motion > Linear Actuators

returns linactuat:

• policy: No Returns

seller linactuat:

• city: Kendall Park, New Jersey
• rating: 100.0%
• # reviews: 185

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