The BERMAD
patented backwash valve has been especially designed for filter
backwashing. The 3-2w principle has a unique diaphragm-actuated valve.
Due
the short valve stroke, the direction of flow changes gradually. The
inlet port closes before the drain port opens and vice versa the drain
port closes before the water inlet opens again. Thus, the flushing
water is kept separate from the water to be purified. A simple
operation saving both water and energy. The special seat and valve ensure perfect backwash-valve closure, also at relatively low operating pressures.
The
design of the valve makes it possible for it to be installed in
different positions and provides for an optimal separation of flushing
water and water to be filtered.
Applications:
The
backwash valve can be used for all filters that can be cleaned by
backwashing, such as sand filters, high-bed (multi)media filters,
S.K.-disc filters and CAF units. Very
simple automation is achieved by installing two or several filters in
parallel. At the moment the backwash valve receives a control signal,
the flow to the filter is shut off and the flushing line opens. The
backwashing operation then uses the filtered water from the other
filter(s). This way, the whole filter unit is cleaned in a step-by-step
operation!
Technical data
BERMAD Backwash valvesManuals