In addition, when installing the ball valve, attention should also be paid to a professional installation problem of the ball valve. The matching of the ball valve and the machinery requires a special interface and the corresponding model. Not all ball valves can be used randomly. In this regard, users need to have certain professional knowledge to use them. 　　

The eccentric butterfly valve is divided into single eccentric butterfly valve, double eccentric butterfly valve, triple eccentric butterfly valve and variable eccentric butterfly valve. Opposite to concentric butterfly valve. Single eccentric butterfly valve: in order to solve the extrusion problem between the butterfly plate and the valve seat of the concentric butterfly valve, the single eccentric butterfly valve was created. Its structural feature is that the stem axis deviates from the center of the butterfly plate, so that the upper and lower ends of the butterfly plate no longer become the rotation axis, which is dispersed and reduces the excessive extrusion between the upper and lower ends of the butterfly plate and the valve seat.