With the development of the automobile industry, industrial technology, high-strength nylon and nylon curtain have been widely used in the domestic membrane electric butterfly valve suspension of passenger cars and in recent years at home and abroad. The dot is:
1. The sealing form of diaphragm electric butterfly valve is adopted, and the self sealing pressure is generally adopted, while the sealing of capsule electric butterfly valve is usually threaded connection, so the sealing of diaphragm electric butterfly valve is simple and easy to remove and install. The membrane electric butterfly valve is simple and easy to mass produce.
2. The electric butterfly valve is covered by a piston, which greatly improves the elasticity of the electric butterfly valve, and obtains the "S" butterfly valve performance curve which is reverse to the electric butterfly valve.
3. The change rate of effective area of membrane electric butterfly valve is smaller than that of bag electric butterfly valve. Therefore, when the auxiliary air chamber is small, the diaphragm electric butterfly valve can obtain a lower natural vibration frequency. It is not easy to design very low butterfly valve frequency.