 Uni-directional knife gate valves are widely used in this application. The valves are mounted horizontally below silos. Typically the orientation is such that the seat faces downwards as in this case there is less chance of the media settling on the seat area and possibly obstructing the valve closure. One point to be noted while selecting valves is that knife gate valves cannot close against a stagnant column of packed powder material. The powder material must be flowing while the valve is closing.
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Industrial Application