5
A
A
C
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T
WATER FILTRATION SYSTEMS
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dvanced
C
leaning
T
echnology
FILTER OPERATIONS
General: The 1-Inch ACT Auto-Flush Filter uses Arkal Ring Disc filter media to remove
suspended solids for fluids passing through the unit. The filters require cleaning when
they become loaded with sufficient solids to inhibit flow causing a pressure differential
across the filter media of 5 psi to 7 psi. The back flush controller actuates the auto-flush
function when pressure differential reaches a predetermined set point. Another option
uses time or time and pressure differential to initiate the back flush.
Filter systems are arranged in 1 and 2 filter element systems. The single filter unit uses
a secondary screen filter to remove debris from the inlet water and protects the cleaning
spray nozzles on the filter spine that supports the ring discs. The multiple filter units are
dependent on each other to provide clean back flush water. The filter controller
sequentially back flushes each filter for the pre-set back flush cycle. During the back
flush, no water is allowed to discharge from the filter units unless equipped with a
pressure-sustaining valve pilot.
Operation:
ACT 100S: Filtration Mode. Refer to Single Filter
Illustration. Water enters the inlet fitting and moves
through the normally open valve. Water moves through
the main ring disc filter and discharges through the
normally open outlet valve and out through the flow
meter. The flush and flush return valves are normally
closed and have no flow in the Filtration Mode. A small
continuous cleaning flow from the secondary flushing
filter returns to the treatment system to remove debris
caught by the screen.
Back Flush Mode. In the back flush mode, a 24 VAC signal is sent to both solenoids.
This action causes the Inlet and Outlet valves to close. The Flush and Flush return
valves open. Incoming water is routed through the secondary screen filter and through
the Filter Flush valve. This action causes the filter disc support spine to lift and
simultaneously engages the spray nozzles to spin and clean the discs. Debris and flush
water flow from the main filter to the Flush Return valve. The flush water returns to the
