Butterfly dark bar called the flap valve cast iron flange valve is a simple structure of the control valve, butterfly valve can be used to switch control of the media is low-pressure pipe closed parts (valve or disc) to the disc around the valve shaft A valve rotation to achieve open and close the valve can be used to control the flow of air, water, steam, corrosive media, mud, oil, liquid metals and radioactive fluids and other types of media. Cut off from the main pipe and the throttle effect. Butterfly is a disc-shaped opening and closing parts of the disc, in the valve body rotating around its own axis groove rising stem gate valve, so as to achieve the purpose of opening and closing or regulation. High-performance three eccentric hard sealing butterfly valve groove signal, characterized in that: the valve seat ring from soft T-ring seals on both sides of a multi-layer stainless steel sheet. The sealing surface of the valve plate and seat for the oblique cone structure, oblique cone surface in the valve plate welding temperature, corrosion resistant alloy materials; fixed regulation of the spring between the plate and the plate ring bolt assembly structure in regulation. This structure effectively compensate for tolerance between the sleeve and the valve stem and the elastic deformation under media pressure, the valve sealing problems in the course of a two-way exchange of media delivery exist. Use of soft T-seals on both sides of the multilayer film composed of stainless steel, has the dual advantages of a metal seal and soft seal, both at low and high temperatures, all with zero leakage sealing performance. Brass flange valve, Ming Hong Kong valves, gate valve is provided by the Hong Kong Science and Technology Co., Ltd., Dongguan Ming. Port Valve Co., Ltd., Dongguan Ming (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the next port of the valve leading the staff warmly welcome all inquiries negotiations to create the next port of the valve a better future.