According to engineering control requirements, the control function of electric butterfly valves is completed by electric devices. The purpose of using electric butterfly valves is to achieve non manual electrical or computer control of valve opening, closing, and adjustment linkage. Currently, the use of electric butterfly valve devices is not only to save manpower
That's it. Due to the significant differences in functionality and quality among products from different butterfly valve manufacturers, choosing an electric actuator and selecting the corresponding valve are equally important for the project. When choosing an electric actuator, we need to determine the control mode of the electric actuator according to the production process control requirements: the control mode of the electric actuator is generally divided into two categories: switch type (open-loop control) and regulating type (closed-loop control).
1. Switch type
The switch type electric actuator electric device generally realizes the opening or closing control of valve i. Valve i is either in the fully open position or in the fully closed position, and this type of valve i does not require precise control of the medium flow rate. It is worth mentioning that switch type electric actuators can be divided into separate structures and integrated structures due to their different structural forms. When selecting, it is necessary to provide an explanation for this, otherwise mismatches such as conflicts with the control system often occur during on-site installation.
2. Adjustable type (closed-loop control)
The regulating electric actuator electric device not only has a switch type integrated structure but also precisely regulates the medium flow. It can also provide precise control over valve l. Parameter specifications that need to be specified when selecting electrical components for adjustable electric actuators.
How to choose electric butterfly valves as a business? The midline soft seal butterfly valve is widely used in water supply and drainage, sewage treatment, hydropower, food, petroleum and other commonly used valve seat sealing materials: EPDM and PTFE, suitable media: fresh water, sewage, air, various oils.
Eccentric metal sealed butterfly valve is widely used in petroleum, chemical, power generation, metallurgy, and urban heating systems. The commonly used valve seat sealing material is various stainless steel composites, suitable for media such as high-temperature steam, slurry, pulp, and other impurity containing media.
The low load butterfly valve is widely used in gas regulation, ventilation and dust removal, and environmental protection systems in industries such as burners, industrial furnaces, and metallurgy. The valve body structure of this product is welded with steel plates, which is simple in structure, light in weight, and easy to use and maintain. The structure is a non sealed valve. Applicable media: low-pressure air, gas, high-temperature gas, etc.
Fluorine lined butterfly valves are widely used in industries such as water treatment, metallurgy, food, and chemical engineering. The valve body structure of this product is fully lined with PTFE, and the entire valve plate, valve seat, and the part in contact with the medium are fully lined. Applicable media: sewage, seawater, highly corrosive liquids or gases, etc.