Briefly describes the difference between the pneumatic ball valve and butterfly pneumatic valve

pneumatic ball valve and butterfly pneumatic butterfly valve is the biggest difference between the two pneumatic valve to the opening and closing is a piece of board, and pneumatic ball valve is a ball, pneumatic valve of pneumatic butterfly valve plate and pneumatic ball valve pneumatic valve core are around the axis of rotary motion; Pneumatic valve pneumatic brake valve plate is along the axis of lifting movement; Pneumatic valve and brake pneumatic butterfly valve can adjust the flow rate through the opening; Pneumatic ball valve is not easy to do this. Butterfly is the characteristics of the pneumatic valve opening and closing fast, simple structure, low cost, but the rigor and confined ability is bad. Aerodynamic characteristics of pneumatic ball valve and gate valve are similar, but, restricted by volume and resistance of open and close, it's hard to do big caliber. Adjusting the structure principle of pneumatic valve is especially suitable for production of large diameter pneumatic butterfly valve pneumatic valve to the butterfly plate installed on the diameter of the pipe direction. In cylindrical channels of pneumatic valve pneumatic butterfly valve body and disc disc around the axis of rotation, rotation Angle for ° ~ °, rotate to °, the pneumatic valve is fully open. Its simple structure, low cost, adjustable scope is bigger. Pneumatic ball valve usually applies to the class without pellet impurity of the liquid, gas, fluid pressure loss is small, sealed performance is good, high cost. In comparison, pneumatic ball valve sealing pneumatic valve is better than a butterfly. Pneumatic ball valve by pneumatic sealing seat extrusion on the sphere for a long time, it is hemisphere pneumatic valve must wear fast, pneumatic ball valve sealing usually adopt flexible material, also hard to use in high temperature and high pressure pipeline. Butterfly pneumatic valve seal is rubber for mediation, it a hemisphere pneumatic pneumatic valve, pneumatic ball valve, gate valve, metal hard seal performance. Hemisphere pneumatic valve use for a long time, the pneumatic valve seat also can produce trace wear and tear, it may continue to use by adjusting, pneumatic stem and packing in the process of opening and closing the valve stem rotation °, there were signs of leak, compression packing gland bolts again a few, packing place no leakage can be realized, and the other is still the small leak force with pneumatic valve, large leakage in the pneumatic valve. Pneumatic ball valve in the opening and closing process is the enclasp force on both ends of the pneumatic valve seat under operation, it is hemisphere pneumatic valve opening and closing torque, the greater the nominal diameter of open-close torque, the more obvious difference, butterfly pneumatic valve opening and closing is to overcome the deformation of the rubber, torque is bigger. Pneumatic valve, globe pneumatic brake valve operating time is long and arduous. Pneumatic ball valves and cocks pneumatic valve is belong to the same type of pneumatic valves, only its closure is a ball, the ball goes around the center line of the pneumatic valve body for a pneumatic valves to open and close. Pneumatic ball valve in the line is mainly used to do cutting, distribution, and change the flow direction of medium.