Types of Actuator Valves for Industrial Process Control

Diaphragm Actuators

Diaphragm actuators are pneumatically operated, these units use air supply from controllers, positioners, or other sources. Some of the most common styles include direct acting and reverse acting. Some features of these Actuator Valves include

• The net output thrust is measured as the difference between the diaphragm and the force of the opposite spring.
• These types of actuators offer linear performance and a greater level.
• The required output thrust and the availability of air supply pressure dictate the size.
• These types of actuators have a simple design and are known for their reliability.

Piston Actuators

Piston Actuator Valves are also operated pneumatically. A 150 psig high-pressure air is used to operate these units. Since plan air is used in the process, there is no such need for a supply pressure regulator. These actuators are double-acting and give maximum force in both directions. Some of the most notable features of Piston Actuators include —

• Piston actuators offer both fast stroke speed and maximum thrust output.
• You will have the option to add several accessories to place a double-action piston. This includes a locking system and pneumatic trip valves.
• Flywheels are also available with this unit, it can be used to operate butterfly valves and other similar industrial equipment.

Electrohydraulic Actuators

Electrohydraulic Actuator Valves are the best of both worlds. They only require electrical power for the motor and electrical signal input from the controller. Some of the most notable features of these types of actuators include —

• These are ideal for isolated locations where pneumatic supply pressure is not even available. However, you will also need precise control of the position of the plug.
• These types of units can be generally reversed simply by making minor adjustments, and these can be independent too including motor, pump, and hydraulically actuated double-acting piston.