Double Offset Butterfly Valves - MGA Controls

Double Offset butterfly valve valves are often known as excessive efficiency butterfly valves. The ‘Double Offset’ refers back to the place of the shaft within the valve, and due to this fact the opening and closing action of the disc. The shaft slightly moved again from the centreline of the valve, and in addition 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 all through the principle a part of the operating cycle.

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There isn't a upward motion of the stem in a non-rising stem type. The valve disk is threaded internally. The disc travels alongside the stem like a nut when the stem is rotated. You possibly can see the picture. In this kind of valve, stem threads are uncovered to the flow medium.

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