(5) The internal self tightening connection described above is to eliminate the medium pressure with the help of external force to achieve the sealing effect, while the "internal self tightening" connection is to use the medium pressure for self tightening. A knowledgeable friend will surely know that its sealing ring is loaded on the inner cone, and the side facing the medium will form an angle, and then the pressure will be transmitted to the inner cone and the sealing ring. 　　

The main advantages of pneumatic butterfly valve: simple structure, small size and light weight, low cost. The pneumatic butterfly valve has special features. It is installed in the high air tunnel, easy to operate through the two position five way solenoid valve, and can also regulate the flow medium.