6
•
APOLLO DISC-KLEEN FILTER OPERATIONS, MAINTENANCE AND TROUBLESHOOTING GUIDE
BACKFLUSH VALVE:
The Backflush valve has two built-in chambers, the N.O. filter port and the N.C. drain
port. Each port has its own valve seat, but they share a common shaft and diaphragm.
The valve chambers are mutually integrated units. When one port is open, the other is
closed, permitting the backflush valve to perform two modes of operation:
FILTRATION MODE:
The valve permits flow from the inlet manifold through the filter, into the pipeline.
FLUSHING MODE:
The valve closes the inlet manifold and opens the drain port, causing reverse flow
through the filter, ejecting impurities via the drain port. The backflush valve is either
controlled by water pressure or a pneumatic source. Operation is initiated by an electric
solenoid with a manual override feature. A manual override knob is installed on the base
of all AC and DC continuous solenoids. During normal operation, the dot on the round
brass knob should be pointing towards the brass solenoid base (down). Turning this
knob 90 degrees to the left or right will activate the solenoid and put the valve/filter into
a backflush mode. Backflushing should be maintained for 20 seconds, then the knob
can be returned to the auto position for normal irrigation. For DC latching solenoids, the
manual override green lever is in a vertical position. Turning to the left 90 degrees will put
the valve/filter into a backflush mode.
FILTRATION PROCESS:
During the filtration process, the water flows through the inlet manifold reaching the
filters through the backflush valves. The filtered water flows through the outlet manifold
into the system.
Auto
COIL
Off
On
Auto
BASE
Manual
AC & DC CONTINUOUS
SOLENOID MANUAL
OVERRIDE
DC LATCHING SOLENOID
MANUAL OVERRIDE
Command Filter
4” Backflush Valve
4” Twin
Apollo Filter
IN
OUT
3
4
2
1
FILTERS 1, 2 & 3 ARE IN FILTRATION MODE
Air Release Vent
FILTER OPERATION
FLUSHING MODE
FILTRATION MODE
