At present, the butterfly valve that is widely used in municipal, petroleum, chemical industry, light industrial and other water supply and drainage fields has various types, there are center linear, single eccentric, double eccentric, and even three eccentric, but they all have a common feature: Usually have bonnet, and because the disc is cast iron pieces, that is long-term exposure to air, water and other media, (TodayHot) and is serious corrosion, pollute the environment, meanwhile the used valve stem is throughout the disc, the circulation area is small, torque is too large, coupled with more parts, causing difficult maintenance. "M"-type butterfly valve is a new unique valve, completely overcomes the existing many technical shortages of butterfly valve industry, integrated to improve the use of valve performance.
2010-08-13