Pneumatic butterfly valve sealing structure and working principle

Since PTFE butterfly valves sealing performance, running light, Vice corrosion, high temperature, simple to operate, flexible, secure and trustworthy is commonly employed in different industries, pneumatic butterfly valve seal structure within the form: a single eccentric seal, double eccentric seal, 3 eccentric seal, variable eccentric seals, different Seal structure of pneumatic butterfly valve sealing principle summarized as follows: 1 single eccentric butterfly valve seal metal seal butterfly valve sealing principle: Considering that the basis of a single eccentric butterfly valve disc will likely be the center of rotation (center of both the valve axis) and body size of the center line of the formation of bias, producing the butterfly valve inside the open method, the disc sealing surface will probably be over a single eccentric butterfly valve seal Rapidly from the seat sealing surface, disc rotation to 8 ~ 12 , the disc sealing surface entirely sealed from the valve seat, totally air soft seal butterfly valve opens, the two formed among the sealing surface of a bigger gap, sort of valve style, significantly reduces the sealing surface in between the two mechanical grinding Loss and congestion pressure deformation, to ensure that valve sealing performance is much more improved; 2 double eccentric butterfly valve seal sealing principle: Because the foundation will double eccentric butterfly valve and valve seat then the center line of the center line to form a pneumatic seal butterfly valve angle |? the bias, creating the butterfly valves along the way of Kai , the disc sealing surface instantly within the opening moments from the seat sealing surface, In the second prior to make contact with and clamping off the valve seat sealing surface. When completely open, the sealing surface among the two form a double eccentric butterfly valve seal using the identical space, such butterfly valve style, the total elimination of the two sealing surface in between the mechanical wear and abrasion, Stainless-steel Pneumatic butterfly valve to create butterfly valve Sealing performance and service life have been significantly improved; 3 variable eccentric butterfly valve seal sealing principle: variable eccentric butterfly valve is exclusive in that the stem axis installation disc can be a three-axis structure, the 3 sections of rubber lined butterfly valve electric valve rod axis two-axis section of concentric, although the center section of the shaft centerline as well as the ends of a center axis deviation from the butterfly plate to Installed on the intermediate shaft segment. This structure makes the eccentric disc inside the completely open position, like a double eccentric, and within the rotating disc to a closed position when the single eccentric shape. As the role of the eccentric shaft, near the close, the disc seat seal to move into a distance inside the cone, butterfly Seal plate and valve seat sealing face consistent with trustworthy sealing performance; 4 high end performance three-eccentric hard-seal butterfly valve two-way, characterized in that: as described in T-shaped valve seat ring seal ring from soft stainless-steel sheet on both sides of multi-layer composition. Valve plate and valve seat sealing surface for the oblique cone structure, oblique cone surface within the valve plate welding temperature, corrosion resistant alloy material; Pneumatic folder challenging Seal butterfly valve plate fixed to the adjustment ring on the plate in between the spring and adjusting screw assembly using the structure. Pneumatic butterfly valve as a result of application in diverse locations, the use of the seal structure there'll be diverse, the selection of Pneumatic butterfly valve, it will need to be according to actual use, pick the suitable seal form. Discover extra PTFE butterfly valves.