Electric butterfly valve Electric butterfly valve has gradually come into people's view with its outstanding advantages. There are several types of electric butterfly valves, 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 butterfly valve decreases with the increase of curvature, but the lateral stability of the butterfly valve is poor and the curvature is too large. The electric butterfly valve has large change rate of effective area and high rigidity. Therefore, the method of adding auxiliary chamber is usually adopted to reduce the stiffness of butterfly valve. When the pressure is high, the effect of increasing the volume of the auxiliary chamber on the stiffness of the butterfly valve is obvious, but with the increase of the volume, this effect gradually decreases. For the encapsulated electric butterfly valve, the proper stiffness of the butterfly valve can be obtained by reasonably selecting the change rate of the effective area of the butterfly valve and the volume of the auxiliary chamber. Due to the small change of membrane curvature, the service life of the cystic electric butterfly valve is long.
2。 The effective area change rate of the electric butterfly valve of the diaphragm type electric butterfly valve is smaller than that of the electric butterfly valve of the cyst type electric butterfly valve, so a lower stiffness of the butterfly valve can be obtained without an 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 cystic electric butterfly valve. In addition, the membrane electric butterfly valve adopts the butterfly valve sealing form, which can adopt the pressure self sealing type, with simple structure and low cost. The service life of diaphragm electric butterfly valve is generally not longer than that of electric butterfly valve. At present, diaphragm electric butterfly valve has been widely used in automobiles.
3。 From the structural point of view, composite electric butterfly valve electric butterfly valve is between the two types. It combines the advantages of two kinds of electric butterfly valves and has low butterfly valve stiffness, but its manufacturing process is complex.
There are many types of electric 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.