Our Boll Duplex Filter Range

Duplex filters consist of two filter housings. One filter housing is in operation whilst the other, cleaned, half of the filter is held in reserve.

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.