Electric regulating butterfly valve

The working principle and core components of the electrically adjustable butterfly valve are analyzed as follows:
1、 Basic working principle
Electric drive control
By receiving power signals (such as 220V voltage or 4-20mA control signals) through electric actuators, the valve stem is driven to rotate, and the butterfly plate is driven to rotate around the axis, achieving the opening, closing, or flow regulation of the valve.
Angle adjustment and flow control
The rotation angle of the butterfly plate (usually 0 ° -90 °) determines the opening degree. When fully open, the butterfly plate is parallel to the pipeline, and when fully closed, it is perpendicular. By changing the angle, the flow rate of the medium can be precisely adjusted.
Limit feedback mechanism
The limit switch monitors the number of rotations of the spindle, calculates the degree of butterfly plate opening and closing, and automatically cuts off the motor power when it reaches the set position to prevent overload.
2、 Core component functionality
Example of Material/Type for Component Function
Valve body pipeline connection support, built-in butterfly plate cast iron, stainless steel
Butterfly shaped disc-shaped metal component, rotation control medium flow hardening treatment metal
Electric actuator receives control signals and drives the valve stem to rotate (supports remote/on-site operation) with reducer model
Sealing structure to prevent leakage (rubber sealing ring needs to be replaced regularly, metal sealing is resistant to high temperature and high pressure) Soft seal/hard seal
3、 Control mode
Manual control
Switch to on-site mode by switching the switch, and operate the valve directly by rotating the knob.
Automatic control
Receive 4-20mA signals from PLC or DCS systems to achieve automated flow regulation.
4、 Typical application scenarios
Ventilation system: regulating duct airflow (such as industrial smoke exhaust, building air conditioning)
Fluid control: water treatment, chemical pipeline flow regulation
Fire protection system: quick opening and closing smoke exhaust butterfly valve

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