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Horizontal belt filters working on the vacuum principle were originally developed for process applications where intensive washing is required, but are now also employed for a wide variety of filtering requirements. They have become such a versatile processing tool that they have taken a considerable share of the market from the former workhorse of the vacuum filter business, the rotary drum filter, and also quite a share from traditional filter press applications.

Apart from the simple paper band filter, the horizontal belt filters are continuously operating filters, used for the recovery of solids from suspensions containing quite high concentrations of solids. These generally fall into three categories. reciprocating vacuum trays rubber belts and a stationary vacuum system, and with a supplementary press belt device.

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