When the pneumatic butterfly valve is in the middle opening, the opening shape formed by the valve body and the front end of the butterfly plate takes the valve shaft as the center, and the two sides will form different states. The front end of the butterfly plate on one side rotates along the water, while the other side moves against the water. Therefore, correspondingly, one side of the valve body and valve plate will form a nozzle like opening, and the other side will form a similar orifice like opening. As a result, the flow rate at the nozzle side is much faster than that at the throttling side, and negative pressure will be generated under the valve at the throttling side, which will easily lead to the problem of rubber seals falling off. Pay extra attention to this problem when using the soft seal butterfly valve.

Precautions for using pneumatic butterfly valve
Pneumatic butterfly valves are composed of pneumatic actuators and butterfly valves. Most of them are used in low pressure large and medium diameter pipelines. The main categories are: stainless steel pneumatic butterfly valves, hard seal pneumatic butterfly valves, soft seal pneumatic butterfly valves, carbon steel pneumatic butterfly valves. Hebei Diefei Valve Co., Ltd. is a professional manufacturer of butterfly valves. For many years, it has insisted on cooperating with many companies, Give priority to the development of the company's business and capabilities, making the development of the enterprise better and better.