Butterfly valve Principle
Valve opening and closing is a disc-shaped pieces of the disc, the valve body around its own axis of rotation, or adjustments to achieve the opening and closing the valve called the Butterfly valve. Valve fully open to fully closed is usually less than 90 degrees, Butterfly valve and Butterfly valve stroke does not have a strong self-locking, in order to position the disc to install the valve stem on the worm gear reducer. With worm reducer, not only can make the disc with self-locking capability, so that the disc stops at any position, but also to improve the operational performance of the valve. Industry-specific characteristics of Butterfly valve valves to high temperature, for higher pressure range, the valve nominal diameter of large, carbon steel valve body, valve plate rubber seal with metal ring instead of ring. Large-scale manufacture of high temperature valve welded with steel plate, the main medium for high-temperature air duct smoke and gas pipelines.
Butterfly valve benefits
Butterfly valve valves open and close easily and quickly, saving, small fluid resistance, can often operate, simple structure, small size, light weight, can carry mud accumulation of fluid in the pipe outlet at least, low pressure, can achieve a good seal, adjusting performance,
Valve defects
Butterfly valve valve with pressure and operating temperature range is small, poor sealing, the installation, the valve flap to stop in the closed position, open position to disc rotation should be determined with a bypass valve Butterfly valve valve, Open the bypass valve opening should be preceded.
Electric Butterfly valve valve uses the integrated structure, with features, small volume, light and pleasant, reliable performance, supporting a simple element, flow capacity, on the temperature, clean the media, the choice of disc plus soft seal, rubber ring, PTFE ring to reduce leakage, high temperature and pressure conditions can choose three eccentric seal body.

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