Analysis of various electric butterfly valves?
1. When the air chamber volume is the same, the more the curvature, the smaller the stiffness of the butterfly valve. However, if the curvature is too large, the lateral stability of the butterfly valve is poor. Bag type electric butterfly valve The electric butterfly valve has a large change rate of effective area and a high stiffness. Therefore, the method of adding an auxiliary air chamber is usually used to reduce the stiffness of the butterfly valve. When the pressure is high, increasing the volume of the auxiliary air chamber has a more obvious effect on the stiffness of the butterfly valve, but this effect decreases with the increase of the volume. For the electric butterfly valve of bladder type, the proper rigidity of the butterfly valve can be obtained by properly selecting the change rate of the effective area of the butterfly valve and the volume of the auxiliary air chamber. The capsule type electric butterfly valve has a long service life due to the small change of membrane curvature during operation.
2. Membrane electric butterfly valve The effective area change rate of the electric butterfly valve is smaller than that of the capsule type, so the rigidity of the butterfly valve can be lower without an auxiliary air chamber. It controls the change rate of its effective area by changing the shape and size of the piston, so as to obtain a more ideal anti S-shaped elastic characteristic curve. The bladder type electric butterfly valve is difficult to achieve. In addition, from the perspective of butterfly valve sealing mode, the membrane electric butterfly valve can adopt the pressure self sealing type, which is simple in structure and low in cost. The service life of membrane electric butterfly valves is generally not as long as that of valve valves. At present, membrane electric butterfly valves are mostly used in automobiles.
3. From the structural point of view, the composite electric butterfly valve electric butterfly valve is a type between the first two. It combines the advantages of the above two types of electric butterfly valves, has low butterfly valve stiffness, but the manufacturing process is complex.
The main products of Shanghai Dongfeng Pump Valve Factory are: electric butterfly valve, electric butterfly valve, metal hose, corrugated compensator, etc. If you need, please consult the 24-hour hotline of Dongfeng: 021-60344211