懂色av一区二区三区-懂色av一区二区-懂色av一区-懂色av色吟av夜夜嗨-日韩看片-日韩久久综合

D641W-1C Pneumatic Ventilation Butterfly Valve introduction
D641W-1C Pneumatic Ventilation Butterfly Valve produced and sold by Baigang valve group valve body made of the same material into a ring, the use of electric or pneumatic drive. The applicable temperature with the body material selection may be, nominal pressure ≤ 0.6MPa, generally applicable to industrial, metallurgical, environmental protection and other pipe for ventilation regulation of media flow purposes.

D641W-1C Pneumatic Ventilation Butterfly Valve features 
 1, a new design, reasonable, unique structure, light weight, quick opening and closing. 
 2, torque is small, easy to operate, labor-saving smart. 
 3, the use of adaptive materials to meet the low, medium and high temperature of different media and corrosive media.

D641W-1C Pneumatic Ventilation Butterfly Valve dimensions (PN0.5,2.5)