This paper introduces the advantages of pneumatic valve fluorine-butterfly as weakness and the matters needing attention

the pneumatic valve is divided into three categories: straight through, right Angle type and once-through inclined by the pneumatic valve. Advantages

lining fluoride by pneumatic valve has the following advantages:
manufacturing and maintenance more convenient. Simple structure.
opening and closing time is short. Working stroke is small.
sealing surface friction between the small, sealed well. A longer service life.
lining fluoride by pneumatic valve faults are as follows:
required when opening and closing force is larger. Fluid resistance.
is not applicable to medium with larger particles, viscosity, easy to coking.
poor regulation performance.
have straight-through type, straight and Angle. As pneumatic valve, the form of the seal of high pressure by the pneumatic valve types according to the location of the pneumatic valve stem threads with external thread type, internal thread type. According to the flow of medium. There is packing seal by the pneumatic valve and pneumatic valve bellows seal globe. Attention

lining fluoride by pneumatic valve installation and maintenance should be paid attention to the following:
the handwheel, handle the operation by the pneumatic valve can be installed in any position.
does not allow for lifting. The handwheel, handle and wei mechanism.
the flow of medium should be consistent with the direction arrow shown in pneumatic valve body.
is also called the door and hong feng by the pneumatic valve. The most widely used a kind of pneumatic valves, are popular because of the sealing surface friction between the opening and closing process, more durable, opening, manufacturing easy, convenient maintenance, not only suitable for low voltage, and is suitable for high pressure. Closed principle depend on pneumatic valve rod pressure, pneumatic valve sealing surface and the pneumatic valve seat sealing surface fit closely, prevent medium circulation.
device orientation. Pneumatic valve length is greater than the gate structure, by the pneumatic valve only unidirectional flow medium. Fluid resistance is big at the same time, the operation of the temporary, seal reliability is not strong.