4、 The valve seat of the pneumatic high-pressure ball valve adopts an elastic sealing structure, with absolutely reliable sealing performance and simple operation. What's more, it is very attractive. If the ball valve fails accidentally, it is easy to repair it. The installation or disassembly of this type of ball valve can be completed by yourself. When a fault occurs, you don't need to pay professional workers to help repair it, and you can also complete it yourself. 　　

The butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. The valve can be quickly opened and closed only by rotating 90 °, which is simple to operate. 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. For elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.