Electric butterfly valve is a kind of automated valve device to control the fluid channel through the rotation of the butterfly plate driven by the electric actuator, and its core function is to open and close, regulate and cut off the flow of media.
I. Definition and core components
Basic structure: composed of electric actuator and butterfly valve body, the core component is a round butterfly plate, through the rotation of the valve stem to achieve the opening and closing of the valve. Butterfly plate in the valve body around the axis for 0 ° to 90 ° rotation, fully open with the pipeline axis parallel to the fully closed vertically cut off the flow path.
Driving mode: the electric actuator receives the control signal and drives the motor, and the deceleration device drives the valve stem and the butterfly plate to adjust the angle precisely.
II. Working Principle
Opening and Closing Control Opening
Process: After the actuator receives the opening instruction, the butterfly plate gradually rotates from fully closed (0°) to fully open (90°), and the fluid channel is gradually enlarged.
Closing process: after the actuator receives the opening instruction, the butterfly plate rotates from fully closed state (0°) to fully open (90°), and the fluid channel is expanded gradually.
Flow regulation
By controlling the rotation angle of the butterfly plate (such as 30°, 60° and other intermediate states), linear or percentage adjustment of the flow rate can be achieved to meet the needs of different working conditions.
III. Technical features and advantages
Seal and material using
nitrile rubber, PTFE and other sealing materials, adapt to water, steam, corrosive media and other fluids.
The valve body can be made of cast iron, stainless steel and other materials, taking into account the pressure resistance and corrosion resistance.
Performance advantages
Compact structure: small size, light weight, especially suitable for large diameter pipeline installation.
Rapid response: electric drive can realise opening and closing in seconds to meet the demand of automation control.
Intelligent control: some models support adaptive pressure adjustment and anti-water hammer design, reducing pipeline impact through phased slow closure.
IV. Typical application scenarios
in the field of energy and industry Hydroelectric
power plant: used for turbine water inlet control, cooling system flow regulation and pipe network pressure stabilisation.
Petrochemical industry: in oil refining, gas pipelines to achieve the safety of corrosive media cut-off and flow management.
Municipal and environmental protection
Water supply system: remote control of water flow from the water plant to ensure the pressure balance of the pipe network.
Wastewater treatment: accurately allocate the water flow of each treatment link to optimise the treatment efficiency.
Building Facilities
Heating, ventilation and air conditioning (HVAC): regulates circulating water flow to maintain stable indoor temperature.
High-rise building water supply: achieve pressure balance on different floors through hierarchical control.
