Pneumatic butterfly valve pneumatic butterfly valve with its outstanding advantages gradually into people's vision. Pneumatic butterfly valve There are several types of pneumatic butterfly valve, which can be used according to different situations, including cystic, membrane and composite materials. Let's introduce it in detail.
1。 When the air chamber volume is the same, the stiffness of the ball valve decreases with the increase of curvature, but the lateral stability of the ball valve is poor and the curvature is too large. Type pneumatic butterfly valve Pneumatic butterfly valve has large change rate of effective area and high rigidity of ball valve. Therefore, the method of adding auxiliary chamber is usually adopted to reduce the stiffness of ball valve. When the pressure is high, the influence of increasing the volume of the auxiliary chamber on the stiffness of the ball valve is obvious, but with the increase of the volume, the influence gradually decreases. For the pneumatic butterfly valve with bladder, the proper stiffness of the ball valve can be obtained by reasonably selecting the change rate of the effective area of the ball valve and the volume of the auxiliary chamber. Due to the small change of membrane curvature, the service life of the cystic pneumatic butterfly valve is long.
2。 The effective area change rate of diaphragm pneumatic butterfly valve pneumatic butterfly valve is smaller than that of cyst pneumatic butterfly valve pneumatic butterfly valve, so lower ball valve stiffness can be obtained without auxiliary chamber. By changing the shape and size of the piston to control the change rate of its effective area, an ideal anti S shape elastic characteristic curve can be obtained. However, it is difficult to realize the pneumatic butterfly valve. In addition, the membrane pneumatic butterfly valve adopts the ball valve sealing form, which can adopt the pressure self sealing type, with simple structure and low cost. The service life of diaphragm pneumatic butterfly valve is generally not longer than that of pneumatic butterfly valve. At present, diaphragm pneumatic butterfly valves are widely used in automobiles.
3。 From the structural point of view, composite pneumatic butterfly valve pneumatic butterfly valve is between the two types. It combines the advantages of two kinds of pneumatic butterfly valves and has low ball valve stiffness, but its manufacturing process is complex.
There are many types of pneumatic butterfly valves, which can be selected according to the different needs of different industries. This is also a popular factor in the field of vibration isolation valves.