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| Stop Gates |
Cup & Drum Screens |
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| Raking Machines |
Debris Filter |
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| Band Screens |
Tube Cleaning |
For the fine filtration
of raw water and/or condenser protection
at:
• Power stations (nuclear,
fossil and hydro)
• Petro/chemical plants, desalination
plants
• Land and storm drainage pumping
stations
• Potable water treatment plants
• Water reclamation facilities
• Various screening applications
Stop Gates
 The
Bracket Green® Stop Gate is custom
built to withstand the design differential
for each particular application. The
gate is of welded construction, fabricated
from steel plate and rolled steel sections
and fitted with neoprene edge seals.
A single piece Stop Gate is normally
designed for installation at the bottom
of the channel with a civil work apron
wall extending up from the top of the
opening, to deck level. Gates can also
be supplied in sections with one section
arranged to locate above the other so
that it extends to the highest water
level thereby eliminating the necessity
for a concrete apron wall. The provision
of Stop Gates allows the channel to
be dewatered to facilitate routine inspection
on either the screening equipment or
intake pumps. |
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| ADVANTAGES |
Preformed
Neoprene Seals ensures positive sealing
in guides
Equalizing valves allow gravity equalization
for gate removal
Mechanical Interlock to prevent inadvertent
disengagement |
Raking Machines
The Brackett Bosker®
Raking machine is designed for highly
effective bar screen cleaning in a wide
range of applications including power
stations (nuclear, fossil and hydro);
land and storm drainage pumping stations;
drinking water intakes; and industrial
pumping stations. Simplicity of design
and efficient debris handling make the
Bosker Raking Machine the ideal solution
for cost efficient cleaning of single
or multiple bar screens. Our engineers
customize every Raking Machine to site
& application specific parameters.
Retrofit into existing installations
is simple and there is usually no need
for expensive civil modifications. The
Brackett Bosker Raking machine has continually
evolved since its introduction in 1960
and its success has been reinforced
by Brackett Green’s century of
experience in mechanical water filtration.
Today, there are more than 500 Boskers
in successful operation world-wide.
It is this unique combination of efficient
design and long term, in depth field
experience that is your assurance of
decades of reliable and economical performance.
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Brackett Bosker® Raking
Machine |
| ADVANTAGES |
Descending Operation
Provides Superior Debris Removal
Fully Automatic Operation or Manual
One machine rakes / Transports / Loads |
Cup
Screens & Drum Screens
Brackett Green’s
Single Entry Cup Screens are recommended
for installation on raw water intakes
where comparatively small water level
variations occur. They ensure the effective
removal of floating and suspended solids,
thus protecting critical equipment such
as pumps and heat exchangers. Brackett
Green’s Double Entry Drum Screens
are ideal for installation on large
volume raw water intakes. They need
little maintenance and effectively remove
floating and suspended debris, thus
protecting pumps, heat exchangers and
other critical equipment. Fitted with
screening openings ranging from 0.5
to 10 mm, drum screens can be installed
as a single unit or as the final stage
of a two or three stage system. All
Brackett Drum Screens are driven by
a simple drive unit positioned at deck
level, the final drive being by a nylon
pinion which engages with a gear ring
on the outside of the drum. The only
moving parts are the drive gear and
the main assembly.
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Double
Entry Drum Screen
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| ADVANTAGES |
No debris
carry over to clean side
Virtually maintenance free operation
Extremely reliable performance |
Dual
Flow Screens & Dual Flow Conversion
Band Screen
The Dual Flow and
Dual Flow Conversion Band Screens have
been installed on intakes at numerous
applications throughout the world. They
have significantly reduced fouling of
down stream pumps, condenser tubes,
heat exchangers, membrane reactors,
disinfection processes and/or critical
water treatment monitoring equipment.
Their superior performance is due to
their design, which avoids the disadvantages
of conventional thru-flow traveling
band screens by minimizing maintenance
costs, as well as station down time.
The Dual Flow Band Screen can be, in
most cases, retrofitted into the existing
well of a thru flow screen without any
civil modifications. Less restrictive
and more efficient than the thru-flow
band screen, the Dual Flow and Dual
Flow Conversion Band Screens combine
maximum through put with the highest
debris capture ratios in the screening
industry.
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Dual
Flow Conversion Band Screen |
| ADVANTAGES
FOR TUBE CLEANING SYSTEMS |
Fully automatic,
dependable operation with minimum maintenance
Easily customized to accommodate retrofits
Low operating pressure drop across the
debris filter |
| DUAL
FLOW SCREENS & DUAL FLOW CONVERSION
BAND SCREEN ADVANTAGES |
No Debris Carry Over to Clean Side
Significant reduction of Screen Maintenance
Increases Plant Operating Efficiency |
| Debris
Filters Accumulations
inside the condenser tubes negatively
impact the plant's performance. Debris
inside the tube also results in the
erosion and failures of tubes. Brackett
Greens's uniquely designed Automatic
Self-Flushing Debris Filters fit within
the cooling water line. The filter
housing actually replaces a segment
of the cooling water piping, eliminating
any need for additional space or extra
piping work. The filtration mechanixm
is designed to remove coarse as well
as fibrous debris including plastic,
muscles, clams, fish, tree roots,
seaweed, algae, rocks, wood chips,
pine cones, leaves, etc. The filter
element is cleaned by an electrically
driven rotor with several suction
parts. Pressure drop/headloss is continually
monitored. As soon as the pressure
exceeds a pre-set value determined
by debris accumulation, the suction
rotor starts and the discharge valve
opens. The cleaning process does not
require further flushing devices or
external pumps. The filter's unique
design provides maximum debris removal
at the lowest operating and maintenance
cost. |
Self Flushing Debris
Filter |
| ADVANTAGES |
Fully automatic, dependable
operation with minimum maintenance
Easily customized to accomodate retrofits
Low operating pressure drop across the
debris filter |
Automatic
Tube Cleaning Systems
Micro fouling and
scaling inside the condenser and heat
exchanger tubes reduces the overall
heat transfer rate and the plant efficiency.
It also contributes to tube failure
due to MIC, under deposit corrosion
and surface pitting. Brackett's On-Line
Automatic Tube Cleaning system (ATCS)
is a permanent and highly effective
solution to eliminate micro fouling,
scaling, and any other surface deposits
from the condenser tubes. Elastomeric
balls, slightly larger than the tube
inside diameter are injected into
the cooling water supply line. The
flow of cooling water forces the balls
into each tube. Balls travel the full
length of the tube, wiping away any
deposits from the tube surface without
adversely affecting the tube material.
The balls are collected as they leave
the tubes by means of a special strainer
that is installed within the cooling
water return pipe from the condenser.
The balls are automatically removed
from the strainer and are re-injected
into the cooling water supply line.
Balls are circulated through the condenser
in a closed loop circuit without having
any adverse effect on the condenser
or the plant operation. |
On-line
Automatic Tube cleaning Systems |
| ADVANTAGES |
Fully automatic with
manual over-ride
Maximum ball recovery & minimum
pressure drop
Simple Design for maximum reliability |
BRACKETT GREEN - A century
of proven performance!
General information
requested with inquiry:
Project Name
New or Existing Site
Pumped or Gravity Flow
Desired Screen Aperture (size hole or bar
spacing)
In-door or Out-door / installation &
operation (Hazardous / Non-hazardous Duty)
Average Daily Flow Rate (MGD) or (GPM)
Peak Daily flow Rate (MGD) or (GPM)
Existing or Desired Channel Depth
Existing or Desired Channel Width
Approximate Depth of water during Average
daily flow
Approximate Depth of water during Peak daily
flow
Desired materials of Construction (Carbon
Steel/ 304 Stainless/ 316 Stainless)
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