Shenzhen disc driven by the stem valves, if the valve turned 90 ° in Guangdong, will be able to complete a hoist. Change disc deflection angle, you can control the flow of media. Use conditions and the media: the butterfly valve is suitable for furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical metallurgy and power generation and environmental protection, water supply and drainage systems and other projects to transport all kinds of corrosive, non-corrosive fluids the pipe medium, for adjusting and cutting off the flow medium. Test proved positive Chi flow state (medium flow direction and the disc rotates in the same direction), the pressure of the sealing surface of torque and media pressure acting valve actuator plate to produce. Positive medium pressure valve plate oblique cone surface and the valve seat sealing surface squeezed more tightly, sealing the better. When countercurrent state seal between the valve plate and seat by the torque drive the valve plate is pressed against the valve seat. With the increase between the valve, the valve plate and seat unit reverse media pressure when positive pressure is less than medium pressure, after adjusting ring spring stored deformation under load to compensate for tight valve plate and seat sealing surface pressure to play the role of automatic compensation. Therefore, this utility model, unlike existing technologies, as the steam valve, install software and hardware multi ring in the valve plate, but directly mounted on the body, in the middle seat plate and an additional adjustment ring is a very good two-way hard sealing method. It can replace the valve, the valve and ball valve. Guangdong valves, valve, the valve is provided by the Hong Kong Ming Ming Port Valve Co., Ltd., Dongguan. Port Valve Co., Ltd., Dongguan Ming (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the next port of the valve and you hand into the brilliant, for a better future!