Marine butterfly Industrial Valves is a kind of closed disc ( Disc or disc) , it opened and closed by valve shaft rotate around. Mainly used for cutting and throttling pipe. Butterfly valve opening and closing is the body around its own axis rotating disc disc, in order to reach the purpose of opening and closing or adjust. Butterfly valve fully open to fully closed, usually less than 90 degrees, the butterfly and the butterfly itself itself is no self-locking ability, in order to make the valve installed on the valve stem of the worm gear. USES the worm gear and worm reducer, butterfly plate not only has the self-locking ability, make the butterfly plate at any position, and improve the working performance of the valve. Butterfly Industrial Valves has the characteristics of high temperature and high pressure. nominal diameter and body are made from carbon steel. plate seal ring with metal ring instead of rubber ring. High temperature butterfly valve made of steel plate welding is mainly used for high temperature medium pipe and gas pipe. Marine butterfly valve advantages as follows: 1, the opening and closing is convenient, quick, energy saving, fluid resistance small, can often operate. 2. Simple structure, small volume, light weight. 3. The minimum quantity of mud can transport, liquid deposition in the pipeline. 4, low pressure, can achieve good sealing performance. 5. Good regulation performance. Marine butterfly valve installation and maintenance should be paid attention to the following: 1, when installation, the valve should be parking in closed position. 2, open position should be according to the butterfly plate to determine the Angle of rotation. 3, take the bypass valve butterfly valve in the open before you open the bypass valve. 4, should be installed according to the manufacturer instructions, the weight of the butterfly valve, should lay a solid foundation. Marine butterfly valve faults are as follows: 1, working pressure and working temperature range is small. 2, poor sealing. Marine butterfly valve can be divided into the form of the structure of offset plate, vertical plate, inclined plate and lever. According to the seal form, can be divided into two and hard sealed. Soft seal usually with a rubber sealing ring, metal hard seal usually use ring seal. According to the mode of connection can be divided into flange and clamp type connection, can be divided into manual, gear transmission, pneumatic, hydraulic and electric.
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