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Extended stem hard sealing butterfly valve
Extended stem hard seal butterfly valve Opening and closing member is a disc-shaped disc, rotating around its own axis in the valve body, so as to achieve opening and closing or regulating valve called butterfly valve. The butterfly valve fully open to the whole is usually less than 90 degrees, the butterfly valve and the butterfly itself does not self-locking ability, in order to disc positioning, to install a worm reducer on the stem. The use of worm reducer, not only can make the disc self-locking ability to stop the butterfly plate in any position, but also to improve valve performance. Industrial butterfly valve features high temperature, high pressure range, the valve nominal diameter, the valve body made of carbon steel, the valve ring using a metal ring instead of rubber ring. Large high temperature butterfly valve welded steel manufacturing, mainly for high temperature medium smoke duct and gas pipelines.