Butterfly (English: butterfly valve) is closed parts (valve or disc) to the disc around the valve axis to achieve the opening and closing a valve in the main pipeline from the off and throttling. Valve opening and closing parts of a disc-shaped electric butterfly valve flange, in the valve body around its own axis, 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 valve flange worm to install worm reducer 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, 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. Installation and maintenance 1, when installing butterfly valve to stop in the closed position. 2. open position should the disc rotation angle to determine. 3, with a bypass valve butterfly clip-on electric butterfly valve, open the bypass valve opening should be preceded. 4, shall be the manufacturer's installation instructions for installation, the weight of a large butterfly, set a solid foundation. Wafer Electric Butterfly | Ming Port Valve | Yunfu butterfly valve 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.