3.6 Seal seat structure of floating pneumatic ball valve See Figure 8 for seal seat structure of floating pneumatic ball valve. Figure 8 Rigid Seal Seat Figure 8 shows that the rigid seal seat itself does not have any elastic deformation. The pneumatic ball 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 ball valve has good sealing performance. To sum up, the key to solving the tightness of pneumatic ball valves lies in the structural form of the seal seat and the selection of the 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 ball valves, and improving the reliability and service life of pneumatic ball valves are key issues to be considered in the design of pneumatic ball valves.

How to distinguish pneumatic butterfly valve from corrugated compensator
The following points about the difference between pneumatic butterfly valve and corrugated compensator are sorted out, hoping to help you:
First, the structure is different. The components of metal flexible joints are mainly bellows, flanges, receptacles and external networks, which play an effective role in noise elimination and vibration reduction for heat shrinkage absorption, pipe system movement and vibration absorption. Metal flexible joints cannot be used to compensate for pipe displacement; Bellows compensator is composed of guide cylinder, bellows, flange and receiver. Its function is to compensate the displacement caused by the temperature change in the pipeline, so as to ensure the operation of the pipeline.
Second, there are different ways of cohesion. There are two connection modes of ordinary bellows compensator, namely flange connection and receiving connection, while the connection mode of metal flexible joint not only involves flange connection and receiving connection, but also involves clamp connection, thread connection, etc., which can match with arbitrary pipeline installation mode.
Third, the content provided is different. The metal flexible joint needs to provide an accurate length, and the customized consumption is completed according to the required length of the pipeline, while the corrugated pipe compensator needs to provide an accurate compensation amount, which is used as the basis for the calculation of the number of corrugations.
Fourth, the upper limits of caliber are different. The diameter of the pneumatic butterfly valve shall not exceed 600mm, while the maximum diameter of the ripple compensator shall be 7000mm, and the consumption can be stopped according to the diameter provided by the user.
The above is related to pneumatic butterfly valve, and I hope it can help you.