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Importance of Valve Actuators

Decades of Expertise and Innovation

Valve actuators convert electrical energy into mechanical motion to control the flow of fluids or gases through valves in industrial systems based on signals from control systems. Important functions of these valves include:

Pressure Management: Actuators modulate valve openings to maintain desired pressure levels within pipelines and distribution networks, preventing overpressure or under-pressure conditions.

Emergency Shutdown: In emergencies such as leaks, spills, or equipment failures, electric actuators can quickly close or isolate valves to mitigate risks and protect personnel and the environment.

Automation and Remote Control: Actuators enable the automation of valve operations, allowing for remote monitoring, control, and integration with supervisory control and data acquisition (SCADA) systems for centralized management.

Maintenance and Diagnostics: Electric actuators often include features for diagnostic monitoring, predictive maintenance, and fault detection, enhancing reliability and reducing downtime in water and petroleum systems.

Applications

Water Pipes

Municipal Water Supply: Electric actuators control valves in municipal water supply systems, including main water lines, distribution networks, and reservoirs. They ensure a consistent supply and pressure for residential, commercial, and industrial consumers.

Water Treatment Plants: Actuators in water treatment plants manage valves that control filtration, disinfection, and chemical dosing, ensuring water quality and the efficient operation of treatment facilities.

Irrigation Systems: Electric actuators regulate valves in irrigation systems, allowing farmers to adjust water flow based on specific agricultural watering requirements, thus enhancing crop yield and conserving water resources.

Petroleum Pipes

Oil and Gas Pipelines: Electric actuators control valves that regulate the flow of crude oil, natural gas, and refined petroleum products, ensuring their safe and efficient transportation over long distances.

Refineries and Petrochemical Plants: Actuators operate valves in various processing units, including distillation columns, reactors, and storage tanks. They manage the safe and reliable operation of plant equipment and pipelines, ensuring smooth production processes.

Sun Yeh Electrical Ind. Co., Ltd., offers a range of electric actuators tailored to meet these diverse application needs. With torque options from 35 Nm to 4500 Nm, Sun Yeh's actuators cater to diverse valve sizes and operational requirements.

Actuator Types

Various types of actuators designed for specific control valve applications include:

: This actuator rotates the valve a quarter of a full circle (90 degrees) and is commonly used with ball valves, butterfly valves, and plug valves, which require a quarter-turn motion to open or close. They are suitable for applications where on/off control or simple modulation of flow is required.

Spring Return Actuator: Also known as a fail-safe actuator, this type is equipped with a spring mechanism that automatically returns the actuator to a predetermined position (usually fully open or fully closed) when power is cut off or during a failure. This feature ensures safety and prevents unintended valve positions in case of power loss. 

Electric Linear Actuator: This actuator translates rotational motion into linear motion, typically used to open or close linear motion valves (e.g., gate valves, globe valves) or to control the position of linear devices such as dampers and gates.

are devices designed to operate safely in environments where there is a risk of explosion due to the presence of flammable gases, vapors, liquids, or combustible dust. These actuators are constructed with materials and design features that prevent sparks or high temperatures from igniting the hazardous substances in the surrounding atmosphere.

Qualities to Look for in Valve Actuators

In both water and petroleum applications, the selection of is influenced by factors such as operating conditions (pressure, temperature, fluid type), valve size and type (gate valves, ball valves, butterfly valves), control requirements (positioning accuracy, response time), environmental considerations (hazardous areas, corrosion resistance), and regulatory compliance (safety standards, certifications). When evaluating actuators for valve applications, several key qualities should be considered:

Torque Range: Actuators should provide a suitable torque range to meet the demands of the valves they operate.

Mechanical Stability: Actuators must exhibit mechanical stability to prevent back-driving of valves and ensure reliable operation. Self-locking mechanisms can enhance stability and prevent unintended valve movements.

Mounting Compatibility: Proper flange connections facilitate seamless mounting of actuators onto valves, simplifying installation and maintenance processes. Mechanical position indicators aid operators in accurately determining valve positions, enhancing operational control.

Manual Override Capability: Including clutch-less manual override mechanisms allows for smooth transitions between electrical control and manual operation, bolstering system resilience.

Electric actuators should provide precise and accurate control with swift response times and minimal lag between control signals and valve action. They should offer consistent performance over time to minimize downtime, improve productivity, and reduce maintenance costs.

The Sun Yeh Advantage

Since 1986, Sun Yeh has met the demands of diverse industries, including gas and oil, energy, water treatment, cooling towers, agriculture, and tunnel ventilation, by tailoring their actuators to meet precise requirements. They manufacture electric actuators for butterfly valves, ball valves, plug valves, dampers, globe valves, and more, ensuring compatibility across industries and streamlining procurement and maintenance processes. 

Sun Yeh’s excellence in design, production, and certification makes them the premier choice for a wide array of sectors globally, adhering to international standards such as CE, CSA, ATEX, IECEx, and SIL for product safety and quality. Sun Yeh collaborates closely with TÜV Rheinland for rigorous testing, offering a trusted ally in optimizing industrial performance and productivity through precision, reliability, and innovation in efficient flow control solutions worldwide.