5
Sand Media Filtration
—
The Miller Leaman
TowerGuard
Filter series utilizes sand media as a means to filter cooling
tower water. The
TowerGuard
will remove suspended solids as low as 10 microns with standard sand media. The
system is designed for side-stream applications only.
TowerGuard
Design
- The design of the
TowerGuard
allows for simple automatic water filtration. The
TowerGuard
starts with a durable welded stainless steel frame to support its components. A fiberglass reinforced vessel is con-
nected to a TEFC pump via Schedule 80 PVC. The
MAXIM
Controller switches two electrically actuated 3-way valves
in order to divert flow for the backflush cycle.
The major system components are identified and described in the table below. Please reference the Product Specifi-
cation for your system’s specific component identification, as the
TowerGuard
systems come in multiple sizes depend-
ing upon the desired flow rate.
Introduction to TowerGuard Automatic Filtration
System Components
Frame / Skid
The T304 stainless steel welded frame supports the system components while providing high durability and
strength.
Filter Housing
The fiberglass reinforced polyester filter housing which contains the sand media bed. This housing is sized
for the system’s flow rate.
Pump
The TEFC pump is matched to the flow rate of the filter and provides the necessary flow of water through the
sand media filter.
MAXIM
Backflush Controller
The
MAXIM
backflush controller monitors the system’s pressure differential and controls the backflush cycle.
It can actuate a backflush cycle by pressure differential (PD), elapsed time, or manually by a user selection.
All of the backflush parameters are user adjustable via the
MAXIM
’s user-friendly menus.
System Piping
The inlet and outlet manifolds direct the flow of water to and from the filter housing. The piping is constructed
of Schedule 80 PVC.
