Fourth, the pneumatic ball valve with high efficiency can regulate the flow with a large amount of flow. It is a right angle rotary structure. It can be used together with the valve positioner to achieve proportional adjustment. V-shaped valve core is most suitable for various adjustment occasions, with large rated flow coefficient, large adjustable ratio, good sealing effect, and sensitive adjustment performance. This feature is more advantageous than ordinary control valves. Large flow brings high efficiency, high workload, and flexible adjustment performance to the factory, which complement the shortcomings of ordinary control valves, such as bulkiness and slow response. 　　

First, because many layers of soft and hard laminated seal rings need to be fixed on the valve plate, if the valve plate is in the normally open state, of course, this value will cause a positive erosion on the sealing surface. In the interlayer of the metal sheet, the soft seal belt will have an impact on the sealing after being washed.