The butterfly plate of butt welding butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 and 90 degrees. When it rotates to 90 degrees, the valve is fully opened.Butt welding butterfly valve The wafer butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be quickly opened and closed only by rotating 90 degrees, and the operation is simple. At the same time, the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. Butterfly valve has two sealing types: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate.
1. Reliable sealing,convenient operation,opening and closing fast.
2. This kind of valve with no flange, which makes pipe elegantly and binding up conveniently.
3. It adopt triple offset elasticity or multiple layers hard sealing configuration, the hermetical capability can reach to reliable sealing performance.
4. The sealing of disc can be replaced by loosening the disc ring bolts, saving the cost of the valve.
5.The ends of valve inlet port and outlet port has the annular boss, which is conducive to the valve and pipe welding heat absorption and diffusion.
Butterfly valves are quarter-turn valves that are best used for the stop/start of media flow in pipelines. When the valve handle is turned 90°, it either opens or closes completely. Throttling can be a bit tough, but these valves can still be used for regulating purposes.
Butterfly valves are usually installed in a fully open position. This is because installing the valve in its closed position can cause difficulties with the seat and seal positions.
Applicable Standards:
Butterfly valve design according to API609, ASME B16.34
Face to face ASME B16.10/API609
End Flanges ASME B16.5/ASME B16.47
Butt Welding ends ASME B16.25
Inspection and test API 598
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