Quarter turn electric actuators employ electricity to power the mechanical components that open, close, and throttle valves. These devices enable valves that require highly accurate positioning to operate in precise quarter, or 90° turns. Some examples of valves which require this high standard of accuracy include ball valves, butterfly valves, choke valves, dump valves, and plug valves.

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Amid the accelerating advancements in smart water management solutions, quarter turn actuators are gaining more operational relevance. Google has indexed numerous new pieces this week discussing the integration of IoT with quarter turn actuators to enhance precision in water treatment systems. The increasing application and innovation in this field are significantly shaping the trajectory of water management technologies.

Quarter Turn Actuator Applications

Indelac Control Inc.’s K-series quarter turn actuator is complying with the American Work Works Association (AWWA) standards, which is the top criteria in the water and wastewater industry. This demonstrates our valve actuators suitability for a number of critical applications, including:

Water Flow

Our actuators are designed to work with butterfly valves—quarter turn valves commonly used in water applications to regulate water flow. Industrial butterfly valves require power-off motor brakes to maintain a secure seal and prevent damage to the actuator by eliminating oscillation. 

Our K-series quarter turn actuators have perpendicular and parallel positions for simple on/off functionality, which allows for easier water control at 45° (or similar) flow configurations. 

Power Outages

When the power goes out at a water or wastewater treatment facility, it can be difficult to control water flow and maintain safe levels. Our fail-safe actuators provide a time-saving solution to these issues, as they are designed to allow or stop water flow automatically in emergency situations. This preventative measure falls into place as soon as power is lost without the need for manual operator initiation, and resets to resume normal functionality once the power returns. Actuators that integrate this fail-safe mechanism can save crucial time in preventing catastrophic equipment or system overload or failure.

In addition, a recent study highlighted on Google shows the benefits of using wireless communication systems with electric actuators in managing power outages more effectively.

Industry Requirements for Electric Actuators

Similar to valves and other industrial water and wastewater components, quarter turn actuators need to meet strict standards to be compliant with industrial and safety regulations. Two of the most important requirements are (i) AWWA certification and (ii) compliance with Standards C540.

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AWWA, or the American Water Works Association, is an international scientific and educational organization that advocates for safe water practices, including in industrial applications. It also certifies parts, facilities, and facility operators as safe and compliant according to its over 170 published standards for design, installation, performance, and manufacturing of water-related parts. The standards that AWWA defines apply to parts and processes used in both water and wastewater treatment and supply applications, including sourcing, treatment, storage, and distribution operations. They also include elements of ANSI, or American National Standards Institute, standards.

Electric actuators, such as quarter turn actuators, are subject to AWWA’s C540 standards. For example, AWWA C542-16 establishes standards specifically for externally mounted electric motor actuators for valves and slide gates, including general design requirements, performance metrics, and materials, while AWWA C540-93 establishes standards for valves 3 inches or larger in diameter and sluice gates.

Acquiring these certifications for valve products is crucial for valve manufacturers, as it is important for consumers to be assured of their investment in high quality parts. When companies invest in AWWA-compliant parts, they can be certain of the parts’ reliability and safety.

Contact Indelac Controls, Inc. Today To Receive a Quote

Indelac’s K-series of quarter turn electric actuators drive precise 90° turn movements to, among other applications, open and close valves in water and wastewater systems. While our standard models feature an emergency fail-safe mechanism, spur gear and worm gear drivetrain, and a class-F motor rated to precise temperature standards, we also offer further customization options for specialized client applications.

To learn more about our high-performing quarter turn electric actuators and how they may suit your unique control application, contact us, or request a quote today.

Electric Actuators

An electric actuator is basically a geared motor. The motor can have various voltages and is the primary torque-generating component. To prevent heat damage from overwork or  excessive current draw, electric actuator motors are usually equipped with a thermal overload sensor embedded in the motor windings. This sensor is wired in the series with the power source and opens the circuit. Should the motor be overheated, it then closes the circuit when the motor reaches a safe operating temperature.

An electric motor consists of an armature, and electrical winding, and a gear train. When power is supplied to the winding, a magnetic field is generated causing the armature to rotate. The armature will rotate as long as there is power to the windings. When the power is cut, the motor stops. Standard end of travel limit switches, which are necessary for an electric actuator, handle this task.

Electric actuators rely on a gear train coupled directly to the motor to enhance the motor torque and dictate the output speed of the actuator. The only way to change the output speed is to install a cycle length control module. This module allows an increase in cycle time only. If a decrease in cycle time is required, an alternate actuator with the desired cycle time and proper output torque must be used.

• No air supply – in many remote locations it may be impractical to run an air supply line and maintain it.
• Colder climate – compressed air systems are vulnerable to freezing and clogging of the air lines, or potentially damaging the equipment if located in a climate that frequently sees temperatures below freezing.
• PLC/DCS controlled process – In the past, standard engineering practice called for pneumatically actuated valves even when the rest of the system was electronically controlled. This required a conversion from electric to pneumatic (I/P) that made systems more complicated to startup and maintain. With the increasing popularity of PLC/DCS systems, many processes and instrumentation engineers are now specifying fully electronic actuation packages.
• Installation savings – The cost to prepare a plant for pneumatically actuating a few valves (compressor, regulators, air lines, etc) far exceeds the cost of using electrically actuated valves
  *even though pneumatic actuators are used, electricity is still required to energize the solenoid valve coils that cycle the pneumatic actuators

All our electric actuator models feature 2-SPDT switches, output torque, conduit size, torque switches (if applicable), and a heater (if applicable).

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