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Features and Benefits

With unbalanced loads, rollers opposite each other act in pairs.  As the gas holder tilts, one roller of the pair engages the upper side of the guide, while the opposite roller engages the lower side, causing the digester covers to attempt to rotate both clockwise and counter clockwise.  This action occurs at each pair of rollers.  The opposing forces result in a positive righting action which assures that the digester cover will not tip of bind under any operating conditions.

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