Electric Butterfly Valve
Electric Butterfly Valve: Overview, Benefits, and Applications
An electric actuated butterfly valve is a type of flow control device that is widely used in various industries for controlling and regulating the flow of fluids through pipelines. The actuated butterfly valve stands apart from manual valves and other industrial valves because of its unique design, efficient operation, and electric actuator.
How Electric Butterfly Valves Work
Motorized butterfly valve work by utilizing an electric actuator to open, close or modulate the position of a disc-shaped element within the valve. This disc, known as the butterfly, is positioned in the center of the pipe, and it rotates to either restrict or permit flow through the valve. The orientation of the butterfly can be adjusted precisely with the help of an electric actuator.
The electric actuator is the heart of the electric butterfly valve, responsible for driving the movement of the butterfly disc. It uses an electric motor to convert electrical energy into mechanical motion, which then rotates the valve stem, adjusting the position of the butterfly disc. When the actuator receives an input signal such as 4-20mA, 0-10V or 1-5V, it interprets this signal to determine the target position of the butterfly and adjusts the disc accordingly.
Design and Components
The main components of an electric butterfly valves include the body, disc, seat, stem, and electric actuator. The body of the valve is typically constructed from materials like ASTM A536 65-45-12, WCB, or CF8M, while the disc can be made from materials such as ASTM A536 65-45-12 with a Nylon coating, CF8, CF8M, 2507, or 1.4462. The seat can be comprised of EPDM, NBR, FRM, or PTFE and the valve stem is typically made from SS420 or SS431.
The body style of the electric butterfly valve is generally wafer-type, which allows for easy installation and replacement. The top flange of the valve is designed according to ISO5211 standards, and it can accommodate various flange types such as EN 1092 PN 6/PN10/PN16, ASME Class 150, AS 4087 PN10/PN16, and JIS 5K/10K.
Benefits and Limitations
Benefits of Electric Butterfly Valves
- Precise control: The electric actuator allows for precise control of the valve’s operation, ensuring accurate regulation of fluid flow.
- Remote operation: Electric butterfly valves can be controlled remotely, reducing the need for manual intervention and increasing safety in hazardous environments.
- Energy-efficient: Electric actuators consume less energy than pneumatic or hydraulic actuators, making electric butterfly valves an energy-efficient option.
- Simple maintenance: Electric actuation components are compact, making maintenance and troubleshooting more straightforward.
|Body||ASTM A536 65-45-12, WCB, CF8M|
|Disc||ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462|
|Nominal diameter||2″ – 80″ (DN50mm – DN2000mm)|
|Operating pressure:||16bar for DN50-DN300, 10bar for DN350-DN2000|
|Temperature range:||-20 °C to + 140 °C (depending on pressure, medium and material)|
|Flange accommodation||EN 1092 PN 6/PN10/PN16
ASME Class 150
AS 4087 PN10/ PN16
On-off type: feedback signal: Passive contact signal/4-20mA/ resistance signals.
Regulation type: Input signal 4-20mA/0-10V/1-5V；
Feedback signal: 4-20mA/0-10V/1-5V
Voltage: AC220V\380V\110V\24V、DC12V\24V etc；Special voltage can be customized.
Explosion-proof class: Can be choose explosion-proof type EX d IIBT4
|Electric actuator||ON-OFF type||Feedback: the active signal, passive contact signal, resistance, 4-20mA|
|Regulation type||Input and output signal: 4-20mA, 0-10v, 1-5v, switch, MODBUS, PROFIBUS field bus|
|Filed operation||The field, remote control switch regulation and MODBUS, PROFIBUS field bus|
Outline size drawing: