Duplex filters are used where filter elements have to be cleaned or replaced without operation being interrupted. These filters permit change-over without
the flow being interrupted.
If the degree of contamination exceeds the tolerance threshold, the operation will then switch to the cleaned half of the filter with no pulse pressure. The contaminated filter insert is then cleaned whilst the plant continues operating. The switch-over takes place by means of a change-over cock or by means of two-stage three-way ball valves. The construction makes it impossible to switch off both filter chambers simultaneously.
Duplex Filters
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