Electric flange butterfly valve is mostly used in water supply and drainage, sewage, food, heating, gas, ships, hydropower, metallurgy, energy mining and light industry, especially for the valve body is easy to rust and two-way sealing conditions, for intercepting and regulating the flow of use.
Metal hard seal valves are more durable than flexible soft seal valves, but the sealing is difficult to achieve perfection. Metal hard seal valve can adapt to high temperature occasions, the elastic seal will be limited by the temperature.
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The electric flange butterfly valve butterfly plate is installed in the diameter direction of the pipeline. The electric flange butterfly valve body has a cylindrical channel with a round butterfly plate inside the channel. The butterfly plate rotates axially around the valve stem, and the size of the rotation angle is between 0° and 90°, and the valve opens completely when it reaches 90°. The electric flange butterfly valve is small in size, light in weight, simple in structure, and consists of a few parts. The butterfly plate rotates to 90° to open and close quickly, and the operation is flexible and convenient. When the flange butterfly valve is fully opened, the thickness of the butterfly plate is the only resistance when the pipeline medium passes through the valve body, so the pressure generated through the valve becomes smaller, so it has excellent fluid control performance. Butterfly valve has two sealing forms, resilient soft seal and metal hard seal. Resilient seal valve, the seal ring can be attached to the valve body or around the butterfly plate.
When the correct size and type of butterfly valve is selected, the butterfly valve can be used as a flow control use. The electric flange butterfly valve structure is more suitable for making large diameter caliber valves. Butterfly valve is not only widely used in gas, petroleum, chemical, water circulation system and other industries, but also used in the cooling water system of thermal power station.
The commonly used electric flange butterfly valves are flange type butterfly valves and butt-clamp type butterfly valves. The butt-clamp butterfly valve is fixed to the piping flange by double-headed nut, and the flange butterfly valve is flanged by the butterfly valve itself, and the flange of the valve is connected to the piping flange by bolts.
