In the field of automation control, electric butterfly valves are commonly used. They mainly fall into two categories: on/off valves and regulating valves. These two types differ significantly in function, application, and control methods.
On/Off Electric Butterfly Valves
Definition and Function
On/off electric butterfly valves serve a basic function: they allow for full opening or closing. They use electric actuators to control the valve's position and are typically used in situations that require quick switching. These valves are essential in pipeline systems, primarily controlling the flow of media.
アプリケーション・シナリオ
On/off electric butterfly valves are suitable for simple flow control of fluids such as water and oil. They frequently appear in applications like water treatment, supply systems, and HVAC (heating, ventilation, and air conditioning). Their straightforward design makes installation and maintenance relatively easy.
Regulating Electric Butterfly Valves
Definition and Function
Regulating electric butterfly valves offer both on/off functionality and flow regulation. They can adjust the valve's opening based on input control signals (such as 4-20mA or 0-10V), allowing for precise control of fluid flow.
アプリケーション・シナリオ
Regulating electric butterfly valves are widely used in industrial processes requiring flow adjustment, including the chemical, pharmaceutical, and food processing industries. They provide high control precision in complex operating conditions, ensuring stable system performance.
主な違い
Control Methods
- On/Off Electric Actuator: This type only supports full opening and closing, with no flow adjustment capabilities. It operates in an open-loop control mode, suitable for simple fluid switching.
- Regulating Electric Actuator: This type allows for precise control of valve openings. It operates in a closed-loop control mode, enabling flow adjustment based on actual needs.
Applicability
On/off electric butterfly valves work best in situations with minimal flow variation. In contrast, regulating electric butterfly valves are ideal for applications requiring significant flow adjustments and precise control.
Selection Considerations
When choosing an electric butterfly valve, consider whether to use an on/off or regulating type based on specific application needs. In addition to the valve body size, pressure, and material, also take into account:
- Power supply parameters (voltage, phase, frequency)
- Control mode requirements
- Flow adjustment precision
結論
On/off and regulating electric butterfly valves differ significantly in function and application. On/off valves are primarily for simple media switching, while regulating valves provide precise flow control. Selecting the appropriate valve type based on actual needs will enhance system efficiency and stability. When choosing, consider all relevant factors to ensure the selected valve meets your specific requirements.
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