This blog intends to provide information about current technology and automation used on industrial and commercial automatic valves and dampers.
UniTorq: Revolutionizing Industrial Valve Actuation with Superior Products
Pneumatic and Electric Actuators
Senitec Valve Position Indicators
Declutchable Gear Overrides
NAMUR Mount Solenoid Valves
Valve Positioners
2150 Boggs Road, Suite 410
Duluth, GA 30096
https://unitorq.com
Phone: (770) 446-7074
Fax: (770) 447-1825
Distinguishing Between Quarter-Turn and Multi-Turn Electric Actuators in Valve Operation
Quarter-Turn Electric Actuators
Multi-Turn Electric Actuators
2150 Boggs Road, Suite 410
Duluth, GA 30096
https://unitorq.com
Phone: (770) 446-7074
Fax: (770) 447-1825
UniTorq Unleashed: High-Performance Valve Automation
Size It Right: Understanding the Risks of Oversized Valve Actuators
Over-sizing valve actuators carries its own set of disadvantages.
- Higher Costs: Larger actuators are more expensive regarding the actual equipment, installation, and maintenance costs, unnecessarily increasing a project's capital and operational expenditure.
- Increased Energy Consumption: Larger actuators require more power to operate. This results in higher energy consumption, both economically and environmentally unfavorable.
- Slower Response Time: Oversized actuators may not respond as quickly to control signals as correctly sized ones, leading to slower operation and reduced system performance.
- Increased Wear and Tear: Operating an oversized actuator at less than its optimal capacity can lead to increased wear and tear because it may not operate in its most efficient range, leading to more frequent maintenance and repairs.
- Larger Footprint: Oversized actuators will occupy more space, which might be a critical issue in places where space is a premium.
- Higher Inertia: Larger actuators have higher inertia, which can make them less responsive to changes in control signals, making the control of the valve more complex and may lead to instability in the controlled process.
- Difficulty in Controlling Smaller Movements: Oversized actuators may have trouble controlling smaller valve movements as they are designed for larger forces and torques, leading to a lack of precision in the control of the valve.
- Compatibility Issues: There may be compatibility issues with the existing infrastructure, requiring additional modifications to the system to accommodate the larger actuator.
- Increased Weight: The increased weight of an oversized actuator may require additional support structures, increasing the complexity and cost of the installation.
- Suboptimal Performance: The actuator may not operate as efficiently as a properly sized one, leading to suboptimal performance of the valve and the overall system.
The Advantages of Using Anodized Aluminum in Industrial Rack and Pinion Actuators
Rack and pinion actuators, widely used in industrial applications, deliver precise linear motion control. The preferred material for their construction is anodized aluminum due to its specific properties that enhance the performance and longevity of the actuators.
Anodized aluminum is lightweight, reducing the overall weight of the actuator system - a crucial factor in weight-sensitive industries like aerospace and automotive. Despite its lightweight, anodized aluminum retains considerable strength, making it suitable for applications demanding strength and durability.
The anodizing process converts the aluminum surface into a corrosion-resistant, anodic oxide finish, providing excellent protection from rust and other environmental corrosion. The thickness of this oxide layer depends on the type of anodizing—Type II or Type III—each providing different levels of corrosion resistance, surface hardness, and color vibrancy.
Type III, often called hard anodizing, forms a thicker oxide layer than Type II. This enhanced thickness results in superior wear resistance and durability, making it suitable for heavy-duty, high-wear applications. It also offers better resistance to high temperatures and produces a surface harder than tool steel. The downside of Type III is that it's less amenable to vibrant coloring due to its denser, less porous oxide layer and requires lower temperatures, higher current densities, and longer processing times.
In contrast, Type II anodizing, while producing a thinner oxide layer, is easier to color, making it more aesthetically adaptable. It's also a more cost-effective process, favoring applications where budget is a significant factor.
Anodized aluminum also offers high thermal conductivity, allowing effective heat dispersion, which is essential in applications where high heat could harm the actuator or shorten its lifespan. Furthermore, anodizing enhances the surface hardness of aluminum, which is beneficial for actuators operating in high wear-and-tear environments.
While anodized aluminum is a common choice, it's not universal, as the material selection depends on the application's specific requirements, environmental conditions, cost, and design constraints. Aesthetics also play, especially in consumer-facing applications, as anodized aluminum can be easily dyed to fit various color preferences.
The choice between Type II and Type III anodizing depends on the application requirements. Type III is the better choice for applications requiring maximum hardness and wear resistance, while Type II is preferable for cost-sensitive or aesthetically-focused applications.
https://unitorq.com
770-446-7074
Understanding Operating Torque and Seating Torque
- Operating Torque: This is the torque required to rotate the butterfly valve disc from the fully open position to the fully closed position (or vice versa). This torque is directly related to the fluid pressure and friction caused by the moving parts of the valve. It generally stays relatively constant throughout the open/close cycle, although it can fluctuate slightly depending on the valve's position and the fluid's flow rate and pressure.
- Seating Torque: Seating torque, also known as closing or breakout torque, is the additional torque needed to fully seat or unseat the valve (i.e., to move the disc from nearly fully closed to fully closed or from fully closed to slightly open). The seating torque is usually higher than the operating torque because it has to overcome additional forces like seal friction or pressure drop across the valve when it's nearly closed.
- Avoiding Undersizing: An undersized actuator may not have sufficient torque to open or close the valve fully, mainly considering the valve's seating torque, which can cause a valve to be stuck in an undesirable position, potentially impacting process control and safety.
- Avoiding Oversizing: Conversely, if an actuator is too large, it could produce excessive torque that may damage the valve's seals or other components.
- Safety and Reliability: Actuators are typically sized with a safety factor to ensure reliable operation under various conditions (changes in pressure, temperature, etc.). Knowing the operating and seating torque allows for more precise sizing, contributing to the valve's overall safety, reliability, and lifespan.
- Efficiency and Cost: Correctly sizing an actuator contributes to energy efficiency, as an oversized actuator uses more energy than required. It also avoids unnecessary costs associated with purchasing and maintaining a larger actuator than needed.
- Adaptability: Having precise knowledge of operating and seating torque enables the actuator to adapt to possible changes in the process conditions (such as pressure, flow rate, or media composition), which may increase the torque requirements.






