15
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax 800-500-3115 • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form CONDINT:2/17
Conductivity Interface
Series
TFW
Conservation of the world’s freshwater resources is a growing global concern. Tower-Flo, recognizing the contribution its solids
removal devices for condenser water systems make to waste water streams, announces a new “
conductivity interface
” feature
included in its control panels. This feature establishes an interface capability with an automatic water treatment controller designed
to permit that controller to:
• prevent the backwash of a filter or the purge of a separator;
• initiate the backwash of a filter or the purge of a separator; and
• receive a signal from the filter or separator controls indicating each time a backwash or purge occurs.
Tower-Flo’s new conductivity interface feature overcomes one of the most commonly raised objections about filters and separators
for condenser water systems - “backwash and purge wastes too much expensively treated water”.
Tower-Flo’s new conductivity interface in a sand filter control panel allows an automatic water chemistry controller to be pro-
grammed with:
• a low conductivity setpoint below which none of the three filter backwash initiation sources (ΔP switch, manual pushbutton,
100 hour backup timer) can cause a backwash; a filter backwash cannot inadvertently drive the conductivity too low.
◦
that low conductivity set point should close a dry contact wired to the available contacts in the filter’s control panel, which
will open when conductivity exceeds that low set point.
•
a high conductivity setpoint that will initiate a backwash;
◦
that setpoint should be higher than the setpoint controlling the water treatment blowdown valve;
◦
filters deliver their best particle retention when they are at their dirtiest; consequently, the filter should never be considered
as the primary blowdown device;
•
use the signal of a backwash to cause the addition of a pre-set volume to a totalized volume of water going to waste.
With Tower-Flo’s conductivity interface in a centrifugal separator control panel, an automatic water chemistry controller can control
the separator’s purge valve the same way it would control a blow-down valve.
This feature is now standard in control panels for Tower-Flo sand filter Series TFW, TFH & TFB. This feature is an option now
available on Tower-Flo centrifugal separator Series TFSP and the optional automatic purge for Series TFS, and will become stan-
dard in the very near future.
