Double Offset Butterfly Valves – MGA Controls
公開日:2022/06/26 / 最終更新日:2022/06/26
Double Offset butterfly valves are also known as high performance butterfly valves. The ‘double offset butterfly valve Offset’ refers to the position of the shaft within the valve, and therefore the opening and shutting motion of the disc. The shaft barely moved back from the centreline of the valve, and likewise out of the centreline of the pipeline, creating a cam-action on which the disc rotates. This considerably increases performance and reliability by dramatically reducing friction throughout the principle part of the operating cycle.
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There is no upward movement of the stem in a non-rising stem sort. The valve disk is threaded internally. The disc travels along the stem like a nut when the stem is rotated. You may see the picture. In the sort of valve, stem threads are exposed to the stream medium.
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