The electric switch butterfly valve features a central line structure or three new structures, which can achieve a tighter sealing performance as it closes; For sealing materials, choose stainless steel and oil resistant rubber to match, without worrying about the use time; 　　

When the butterfly valve is used under special working conditions, such as saving conditioning or requiring strict sealing, or severe wear, low temperature (cryogenic) and other working conditions, it is necessary to use a special butterfly valve with specially designed metal seal and conditioning device for three or two biases.