Electric Butterfly valve Description
The butterfly valve has the characteristics of simple structure, small point volume, light weight, low material consumption, small installation size, rapid switching, 90° reciprocating rotation, and small driving torque. It is used to cut off, connect, and regulate the medium in the pipeline. It has Good flow control characteristics and shut-off sealing performance.
| Design standard | API 609 ASME B16.34 |
| Structural length | ASME B16.10,GBT 12221 |
| Connecting end | ASME B16.5,ASME B16.47,ASME B16.25,GB/T 9113 |
| Test standard | API 598,IS0 5208GB/T 26480GBT 13927 |
| Nominal diameter | NPS 2" - 48DN50- DN1200 |
| Operating temperature | -46 - 250 ℃ |
| Nominal pressure | CLASS 150 - 600 (PN20- PN1001 |
| Material | Main matera: A216 WCB,WCC; A217 WC6,WC9,C5,C12,C12A, CA15; A351 CF8,CF8M,CF3,CF3M,CF8C,CN3MN,CK3MCUN,CN7M; A352 LCB,LCC; A494 CW-6MC,CU5MCUC,M35-1; A890 4A(CD3MN) 5A(CE3MN), 6A(CD3MWCuN), etc. |
Control principle of electric butterfly valver
The control principle of the electric butterfly valve is to control the switching of the valve disc through a motor to achieve flow regulation of liquid or gas. The specific control principle is as follows:
1. Motor control:
Electric butterfly valves are controlled by motors, generally using DC motors or AC motors. According to the control signal, the motor rotates to open and close the valve disc, thereby changing the size of the fluid channel.
2. Receive control signals:
Electric butterfly valves receive external control signals, usually electrical signals or pneumatic signals. Electrical signals are usually analog signals (such as 4-20mA) or digital signals (such as 0-5V), and pneumatic signals are usually air pressure signals.
3. Position feedback:
Electric butterfly valves are usually equipped with a position feedback device to feedback the position information of the valve disc. Commonly used position feedback devices include rotary position sensors or Hall sensors. The position feedback device feeds back the valve disc position information to the control system to achieve precise valve control.
4. Control system:
The control system of the electric butterfly valve calculates the drive control signal of the motor through a control algorithm based on the received control signal and position feedback signal, and controls the rotation direction and speed of the motor to achieve opening and closing control of the valve disc.
In summary, the control principle of the electric butterfly valve is to receive external control signals and position feedback signals through the control system, and calculate the drive control signal to the motor, thereby controlling the opening and closing of the valve disc and achieving fluid flow regulation.
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