The model of pneumatic air duct butterfly valve explains how to open it manually? 3.6 Structure of floating pneumatic butterfly valve seal seat Structure of floating pneumatic butterfly valve seal seat is shown in Figure 8. Figure 8 Rigid Seal Seat Figure 8 shows that the rigid seal seat itself does not have any elastic deformation. The pneumatic butterfly valve completely relies on the medium pressure to form the necessary sealing pressure. This structure has obvious changes in temperature difference, and the sealing performance and operating torque are vulnerable to temperature changes. Figure 9 Lip seal seat Figure 9 shows that because the lip of the lip seal seat has a certain elastic deformation capacity, there is always a certain amount of pre compression force between the seal seat and the ball, which can compensate for the change of pre compression force due to temperature changes and other reasons, so that the pneumatic butterfly valve has good sealing performance. To sum up, the key to solve the sealing problem of pneumatic butterfly valve lies in the structural form of seal seat and the selection of seal seat materials. According to different structures and use requirements, the structural form of the seal seat shall be reasonably selected to ensure good processing technology of the seal seat; The selection of sealing materials with good performance and suitable for use requirements, meeting the sealing requirements of pneumatic butterfly valves, and improving the working reliability and service life of pneumatic butterfly valves are key considerations in the design of pneumatic butterfly valves.
、 The so-called electric on-off butterfly valve is one of the valves widely used in industrial pipelines. There are two main connection modes of electric switch butterfly valve, namely flange type and wafer type. Here, let's take a look at its main structural features.
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