Pneumatic valve disc sealing according to the classification of structure form ( 3)

makes the adjustment in the process of the pneumatic valve in the open, due to the rotary center of the disc ( The pneumatic valve shaft center and disc sealing section according to the eccentric set a. Butterfly plate sealing surface gradually out of the pneumatic valve seat sealing surface, when moving to ° ~ ° butterfly plate, the butterfly plate seal face completely out of the pneumatic valve seat sealing surface, fully open, the gap formed between two seal face x pneumatic valve in the process of opening and closing, so as to make the adjustment between the sealing surface relative mechanical wear and extrusion greatly reduced, so as to ensure the sealing of the pneumatic valve adjustment.
all kinds of structure type pneumatic valve disc sealing principle is briefly as follows: the production of series disc pneumatic valve sealing structure forms: single eccentric sealing, double eccentric seal and seal triple eccentric, eccentric seal.
single eccentric sealing disc sealing principle of pneumatic valve
double eccentric butterfly sealing pneumatic valve sealing principle
makes the adjustment in the process of the pneumatic valve in the open, because on the basis of single eccentric butterfly pneumatic valve, the rotary center of the disc ( Both pneumatic valve shaft center and the center line of the pneumatic valve body form size b bias. Butterfly plate sealing surface will be more quickly than single eccentric sealing butterfly pneumatic valve from pneumatic valve seat sealing surface, when moving to ° ~ ° butterfly plate, the butterfly plate seal face completely out of the pneumatic valve seat seal, when fully open, two sealing surface to form a larger gap between the class y butterfly pneumatic valve design, greatly reduces the mechanical wear and crowded pressure between the two sealing surface deformation, make the butterfly pneumatic valve sealing performance is more improved.
triple eccentric butterfly sealing pneumatic valve sealing principle
makes the adjustment in the process of rev pneumatic valve, pneumatic valve in the pneumatic valve based on pneumatic double eccentric butterfly valve seat centerline to the center line of the pneumatic valve body to form a beta Angle offset. Butterfly plate seal face in open moment immediately out of pneumatic valve seat sealing surface, and in the closing moments will contact and pressure pneumatic valve seat sealing surface. When fully open, the two form a surface is the same as the double eccentric butterfly sealing pneumatic valve clearance of the butterfly design of pneumatic valve y, completely eliminates the mechanical wear and abrasion between the two sealing surface, make the butterfly pneumatic valve sealing performance and service life have been greatly improved.
eccentric sealing butterfly of pneumatic valve sealing principle,
the three axis type pneumatic valve stem concentric, two shaft sections become eccentric butterfly is unique in the installation of pneumatic valve disc of the pneumatic valve stem axis is a three axis type structure. And ZhongXinDuan on both ends of the shaft centerline and axis deviation from a center distance, the butterfly plate is installed on the intermediate shaft section. The eccentric structure makes the disc in full open position double eccentric, while when the butterfly plate rotate to the closed position as single eccentric. Due to the effect of eccentric shaft, close to closing, pneumatic seat seal cone disc to move a distance, the butterfly plate with pneumatic valve seat sealing seal faces to achieve reliable sealing performance.