Valve actuators are mechanisms for opening and closing valves. There are various types, including pneumatic, hydraulic, electro-hydraulic, and electric actuators, each serving specific industrial purposes. Pneumatic actuators are suitable for open-close positioning, providing fast action through air pressure and spring mechanisms.
Control Valve Features
The flow characteristics of each control valve describe the relationship between the flow rate and the control valve travel. When a valve opens, the flow characteristics included in the design of the chosen valve enable a specific quantity of flow through the valve at a specific percentage of the stroke. This allows for predictable flow regulation through the control valve. The three most common types of flow characteristics for control valves are:
There are various types of control valve actuators, each serving specific functions:
1. Pneumatic Actuators:
Utilize air pressure for open-close positioning, ideal for applications requiring fast action.
2. Electric Actuators:
Powered by electricity, offering precise control and automation capabilities in industrial processes.
3. Hydraulic Actuators:
Use hydraulic power to control valve movements, suitable for applications requiring high force and reliability.
4. Pneumatic Rotary Vane Actuators:
Feature a rotary vane design with a single moving part, simplifying construction and enhancing reliability.