Classification of adjusting the structure of pneumatic valve and seal form classification 2)

: (according to the structure classification ） Center sealing butterfly pneumatic valve ( ） The single eccentric coal pneumatic valve seal ( ） The double eccentric sealing butterfly pneumatic valve ( ） Triple eccentric sealing butterfly pneumatic valve sealing surface material: ( ） Soft seal butterfly pneumatic valve. ） Soft nonmetal seal soft non-metallic materials, materials. ） Seal hard metal soft materials, non-metallic materials. （ ） The metal sealing butterfly pneumatic valve. Rigid material from metal to metal sealing, materials. In accordance with the table attached ( ） Forced sealing butterfly pneumatic valve) Elastic sealing butterfly pneumatic valve. Sealing pressure pneumatic valve closing pneumatic valve plate extrusion pneumatic seat, pneumatic seat or pneumatic valve plate elasticity) Plus torque seal butterfly pneumatic valve. Sealing pressure ratio on the application of pneumatic valve shaft torque, ） Pressure seal butterfly pneumatic valve. From seal pneumatic seat or pneumatic valve plate seal components part exert enough pressure, stress, ） Since the seal of the pneumatic valve. Pressure seal pressure automatically generated media. According to the connection classification ( ） The wafer butterfly valve pneumatic valve. （ ） Pneumatic valve flange butterfly. （ ） Lug butterfly pneumatic valve. （ ) Welding butterfly pneumatic valve.