Manual

Page 4
LAKOS SST & PRO II Installation and Operations Manual
The Filtering Process
The filtering process engages the use of a specified sand
media to trap foreign matter on the surface layer,
allowing filtered water to percolate through the
sand media and LAKOS internal v-slotted lateral assembly,
discharging at the bottom of each tank to the outlet
manifold.
The Backwash Cycle
The backwash cycle flushes trapped debris from the sand
media and out of the filter tanks. Each tank in a LAKOS
System is flushed individually for maximum agitation of
the sand media. Triggered by pressure differential, by
elapsed time or manually, each tank's backwash valve
is alternately activated into the backwash mode, which
simultaneously interrupts inlet flow to that particular
tank. Overall system pressure then directs partial system
flow back into and through the tank's lateral assembly.
Flow continues for a prescribed period of time (typically
one minute), suspending the foreign matter and carrying
it out through the tank's top port (normal inlet) and out
through the backwash valve and piping. The backwash
valve then returns to its original position and restores the
now "clean" filter tank to normal service.
NOTE: The LAKOS automatic controller provides a
variable time delay between stations to avoid overlapping
backwash cycles and maximize backwash efficiency.
From water source
(via manifold)
ackwash
alve
Filter Tank
To System
Flow
ispersion
Assembly
edia Sand
LAKOS
Lateral
nderdrain
Assembly
Filter Tank
To ackwash
isposal
ackwash Flow
(from other
filter tanks)
ontaminants
suspended
off media
sand bed
edia Sand
LAKOS
Lateral
nderdrain
Assembly
Basics of Operation