Structural Features and Advantages of Electric Butterfly Valves

Jul. 28, 2021

Electric Butterfly Valves are widely used in many areas of our daily life. Do you understand the related uses and advantages of electric butterfly valves? I believe many people don't know so well. Please follow the editor of electric butterfly valves to understand.

Electric butterfly valve belongs to a variety of electric valve and electric regulating valve. Electric butterfly valve connection methods mainly include: flange type and wafer type; electric butterfly valve sealing forms mainly include: rubber seal and metal seal. The electric butterfly valve controls the switch of the butterfly valve through the power signal. The product can be used as a shut-off valve, control valve and check valve for piping systems. With manual control device, once there is a power failure, it can be temporarily operated manually without affecting the use.

Electric butterfly valves are suitable for occasions that require flow adjustment. Since the pressure loss of the butterfly valve in the pipeline is relatively large, it is about three times that of the gate valve. Therefore, when selecting the butterfly valve, the influence of the pressure loss of the pipeline system should be fully considered, and the strength of the butterfly plate to withstand the pressure of the pipeline medium should also be considered when it is closed. sex. In addition, it is necessary to consider the limitation of the working temperature that the elastic valve seat material can withstand at high temperatures. The structural length and overall height of the butterfly valve are small, the opening and closing speed is fast, and it has good fluid control characteristics. The structural principle of the butterfly valve is most suitable for making large-diameter valves. When the butterfly valve is required to control flow, the most important thing is to correctly select the size and type of the butterfly valve so that it can work properly and effectively. Centerline butterfly valve usually requires short structure length and fast opening and closing speed (1/4 revolution) in throttling, regulating control and mud medium. Low pressure cut-off (small pressure difference), butterfly valve is recommended. Butterfly valve can be used when two-position adjustment, narrow passage, low noise, cavitation and vaporization phenomenon, a small amount of leakage into the atmosphere, and abrasive media. When the butterfly valve is used under special conditions of throttling regulation, or strict sealing requirements, or severe wear, low temperature (cryogenic), etc., a special designed metal seal belt adjustment device is required for triple eccentric or double eccentricity. Butterfly valve.

Structural features of electric butterfly valve:

1. It still has stable sealing performance under high temperature and high pressure conditions. Its special sealing system can ensure high sealing performance in various temperature ranges from ultra-low temperature to ultra-high temperature

2. The three-dimensional eccentric sealing system and optimized design make the valve opening resistance small. The sealing surface of the butterfly plate is an upward convex cone. When opening, all points on the circumference of the butterfly plate are separated from the sealing ring at the same time, and solid objects are not easy It accumulates on the sealing surface. The closing process of the valve is completed by the elastic pressure of the sealing ring.

3. There is no phase jam between the butterfly plate and the sealing ring.

4. The sealing performance of the valve is not affected by temperature changes.

5. The valve stem shaft diameter seal is made of graphite pressed into a sealing ring. In summary, zero leakage is ensured. The metal seal plus the zero leakage before, during and after the fire, so it is an intrinsic fire safety type.

Advantages of electric butterfly valve:

1. It is convenient and quick to open and close, labor-saving, low fluid resistance, and can be operated frequently.

2. Simple structure, small size and light weight.

3. Mud can be transported, with the least accumulation of liquid at the pipe mouth.

4. Under low pressure, good sealing can be achieved.

5. Good adjustment performance.

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