(4) The reason why it has a long service life is that, in addition to these advantages, it also uses a very hard alloy material as the cobalt base for surfacing, so that the sealing surface is strengthened without causing greater wear. 　　　　

Precautions for initial operation When the electric butterfly valve is operated at the beginning, it must pass the air or water leakage test. Some media may remain on the contact surface of the valve during the test. If these media react with the working media, attention must be paid. That is to say, during the initial operation, the pipeline must be completely cleaned in the fully open state, so as not to contaminate the sealing surface to prevent damage to the sealing surface. As a reminder, the valve shall not be opened or closed during flushing.