Category: Valve Actuators / Actuated Valves

Valve Actuators are mechanical devices that utilise various energy sources, such as pneumatic, electric, or hydraulic, to operate valves. They play a critical role in achieving precise control and efficient operation of valves across diverse industrial applications. The three primary types of valve actuators are Linear, Rotary, and Manual.

Linear Actuators

Linear actuators generate linear motion to operate valves and are available in numerous styles. They are commonly used with valves such as Globe, Gate, and Diaphragm Valves, delivering reliable performance and precise control.

Habonim Compact Actuator

Rotary Actuators

Rotary actuators produce rotational motion to operate rotary valves such as Ball Valves, Plug Valves, and Butterfly Valves. These actuators come in a wide range of styles, ensuring compatibility with different valve configurations and applications.

Manual Valve Actuators

Manual valve actuators encompass a variety of options, including:

  • Basic Levers: Typically used with smaller quarter-turn valves, levers can be equipped with locks, Spring Return Handles (dead man handles), or extensions, making them suitable for hot or cold processes.
  • Geared Handwheels: Ideal for larger valves, geared handwheels provide increased torque for effective valve operation.
actuation valves
Actuated Valves by ESI Technologies

Actuated Valves by ESI Technologies Group: Tailored Solutions for Your Needs

ESI Technologies Group specialises in supplying valve actuators and actuated valves that meet clients’ unique specifications. We offer specially engineered solutions for a wide range of applications, ensuring optimal performance and reliability. As an official distributor for Habonim Compact Actuators, we provide products backed by a remarkable 7-year warranty.

Our comprehensive services extend to the assembly of actuation valves and assemblies, customised to your specific process requirements. With a dedicated full-service department, we possess the expertise and resources to deliver high-quality solutions that enhance your operations.

Understanding Pneumatic Actuators: Types and Operation

For pneumatic actuation of rotary valves such as ball, butterfly, and plug valves, the two primary types of actuators are:

  • Rack & Pinion: This actuator converts the linear motion of a piston in a cylinder into the rotational motion of the stem drive. It is available in both single-acting and double-acting configurations.
  • Scotch Yoke: Similar to rack & pinion actuators, the scotch yoke actuator translates linear motion into rotational motion, providing reliable control for rotary valves. It is also available in single-acting or double-acting versions.

Diaphragm Valve Actuators: Linear Pneumatic Control

For linear pneumatic actuators used with gate and globe valves, the air is employed to facilitate the upward and downward movement of the rising stem. Common types of linear actuators include diaphragm and cylinder styles, offering efficient and precise linear control.

Differentiating Single-Acting and Double-Acting Actuators

  • Single-Acting Actuators, also known as spring return actuators, utilise compressed air to drive the piston in one direction. A spring mechanism returns the piston to its original position when the air supply is stopped and vented.
  • Double-Acting Actuators require air to move the piston in both directions. By controlling the airflow into the actuator with a solenoid valve, precise and bidirectional control of the valve can be achieved.

Fail-Safe: Ensuring Safety and Reliability

In actuation, fail-safe refers to the mechanism that activates when the air supply to a single-acting actuator is lost or the power supply to the solenoid fails. In such situations, the valve automatically moves to a safe position (fail-safe) using the force of the springs. This safe position can be either open or closed, depending on the desired outcome that ensures safety and optimal operation.

Contact ESI for Expert Guidance

For more information on valve actuators and actuated valves, we invite you to contact ESI Technologies Group. Our team of experts is available to discuss your specific requirements, offering customised solutions tailored to your needs.

To get in touch, please call us in Ireland at +353 21 4510900 or in the UK at +44 1633 877505. Alternatively, you can reach us through our online form or web chat.

ESI Technologies Group is committed to delivering reliable, high-performance valve actuation solutions that optimise control, enhance efficiency, and ensure operational excellence.

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