Butterfly (English: butterfly valve) is closed parts (valve or disc) to the disc around the valve axis to achieve the opening and closing of a gate valve on the pipe and cut off from the main throttling effect. Valve opening and closing parts is a disc-shaped flange soft sealing butterfly valve, the valve body rotating around its own axis forged steel valve flange, so as to achieve the purpose of opening and closing or adjusting. Valve fully open to fully closed is usually less than 90 °, butterfly and butterfly stroke itself is not self-locking capability, in order to position the disc to install the worm gear on the stem. Using worm reducer, not only can make the disc has a self-locking capability, so that the disc stopped at any position, but also to improve the operating performance of the valve. Industry-specific characteristics of butterfly valves to high temperature, higher pressure range, the valve nominal diameter large stainless steel flange valve, carbon steel valve body, valve plate seal with a metal ring to replace the rubber ring. Large temperature valve welded steel plate manufacturing, mainly for duct smoke and gas pipelines hot medium. Butterfly is reciprocating rotary disc hoist about 90 ° to open, close or adjust a valve medium flow. Butterfly not only simple in structure, small size, light weight, material consumption province, small installation size, small drive torque, simple, rapid, and also can have both good flow regulation and closure sealing characteristics, the development of the past ten years One of the fastest growing valve varieties. Butterfly valve is widely used. Variety and quantity of its use continues to expand, and to high temperature, high pressure, large-diameter, high tightness, long life, excellent regulation characteristics, as well as the development of a multifunctional valve. Its reliability and other performance indicators have reached a high level. Fire dedicated resilient seated gate valve, Ming Hong Kong valve, 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.