Another name for butterfly valve is flap valve, which is a kind of regulating valve with simple structure. According to the driving method, electric butterfly valve can be divided into various types. The one we are going to explain today is the electric butterfly valve. It is a very common type, easy to operate and simple in structure. Let's take a look at the functions and advantages of this butterfly valve.
Electric butterfly valve consists of electric actuator and butterfly valve, so it has the advantages of simple operation and simple structure of butterfly valve. The function principle of electric butterfly valve: through the electric device to drive the valve stem, the butterfly plate produces 90° rotational movement to open and close the valve. The principle of electric actuator is actually very simple. Just like the scraper used in daily life, the energy source is electric power, which drives the valve plate to open and close the valve and circulate or stop the fluid.
The electric actuator of electric butterfly valve can be divided into switching type and regulating type. The switching type electric butterfly valve plays the role of switching; the regulating type electric butterfly valve plays the role of regulating the flow, which can accurately adjust the flow to the thousandth degree, and is also a kind of valve with higher price. Valve as a device installed in the pipeline, if the field check its switching status seems unrealistic, so there is a feedback signal. The regulating type itself has a feedback signal, and the switching type can choose whether to install a feedback signal according to the specific needs of the customer.
1.Electric multi-turn actuator:Electric multi-turn actuator is one of the commonly used and reliable actuator types. It uses a single-phase or three-phase motor to drive the gear or worm gear to drive the stem nut, and the stem nut makes the stem move to open or close the valve. The main advantage of this type of actuator is that all components are installed in one housing and all basic and advanced functions are integrated in this waterproof, dustproof and explosion-proof housing.
2.Electric single rotary actuator: This actuator is similar to electric multi-turn actuator. The main difference is that the actuator finally outputs 1/4 turn to record 90 degrees of motion. The single rotary actuator is compact and can be installed on small size valves, and the output torque is usually up to 800 kg. In addition, due to the small power supply required, batteries can be installed for fail-safe operation.
3. Fluid-driven multi-rotary or linear output actuators:This type of actuator is often used to operate straight-through valves (globe valves) and gate valves, which use pneumatic or hydraulic operation. Simple construction, reliable operation, and easy to implement fail-safe operation mode.
Advantages:Electric actuators have the advantages of easy energy access, fast signal transmission, long transmission distance, convenient centralized control, high sensitivity, high precision, easy coordination with electric regulators, and simple installation and wiring. The disadvantages are complex structure, small thrust, higher average failure rate than pneumatic actuators, and suitable for places with low explosion-proof requirements and insufficient gas source.