This style of Triple offset butterfly valve I have never seen, colleagues said that our company has bought, because the Triple offset butterfly valve is easier to use some of this factory we produce things that are to be exported, people Country the standard is relatively high, so the production equipment is also to be particularly good, or else what comes out is not up to standard would not do. Later, I heard Triple offset butterfly valve used in our industry is very broad, turned out to be the case, I finally a long exposure. I only know this Triple offset butterfly valve in a foreign country more used it.