EQUIPMENT CATALOG
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WSG & SOLUTIONS, INC.
WSG & Solutions, Inc. (Wastewater, Screening, Grit & Solutions) is your OEM
source for Screens and Grit Systems that utilize the proven Link-Belt® and Rex®
technologies and designs for all municipal and industrial wastewater applications.
We are also the exclusive North American distributor of CSO products designed
and manufactured by CSO Technik and Biogest.
WSG & Solutions, Inc. purchased the entire Headworks products business from
Siemens Water Technologies and is located in Montgomeryville, Pennsylvania.
WSG & Solutions, Inc. is the market leader regarding supply of Link-Belt®, Rex®
and CSO municipal and industrial wastewater, screening and grit products
previously provided by Link-Belt, FMC, USFilter, Envirex Products and Siemens
Water Technologies.
The information contained in this document is designed to answer any questions
you may have about WSG & Solutions, Inc. and the company’s offerings.
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What does WSG & Solutions, Inc. do?
WSG & Solutions, Inc. designs, manufactures and supplies screening, grit and
CSO systems. Our engineers utilize the latest in computer solids modeling,
FEA and computational fluid dynamics programs in our innovative designs,
and our operations group teams highly qualified fabrication shops with
inspections to insure delivery of the highest quality products possible. We also
offer full field service support and aftermarket parts for all our products. See
our complete product line shown on page 9 of this document.
What is the company’s mission statement?
WSG & Solutions, Inc. was founded with the fundamental goal of continuous
customer satisfaction in order to enhance its market leader position for the
supply of Link-Belt, Rex and CSO products for the municipal and industrial
wastewater markets. The entire organization is 100% committed to continuous
improvement and delivering first class quality products, services, support and
competitive product pricing and doing what's best for our valued customers.
Aftermarket Services
We can provide Original OEM Parts and Design/Retrofit assistance for any
aftermarket requirement.
We are the exclusive owner and source of all Screening and Grit Aftermarket
parts and Products previously supplied by Link-Belt®, Rex®, USFilter, and
Siemens Water Technologies and have historical records at our facility for
virtually all these Screening/Grit Products.
- Consulting and design expertise for upgrades to your existing products.
- Stock of widely used parts for quick delivery.
- Rebuilds of existing equipment.
- Retrofits to the latest technology.
- Original OEM parts at competitive prices.
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AFTERMARKET PARTS & SUPPORT
When you need genuine Link-Belt®, Rex® or CSO products
replacement parts, Go right to the source
Your link to genuine replacement parts.
Ordering is easy. Just contact Patty Becker at 1-866-353-7084, Ext.
3001 or 267-638-3001 and ask for genuine Link-Belt®, Rex® or CSO products replacement parts.
WSG & Solutions, Inc. supplies original replacement parts for all Link-
Belt®, Rex® and CSO products.
WSG & Solutions, Inc., is your single source for original replacement
parts.
WSG & Solutions, Inc.
160 Commerce Drive, Suite 100
Montgomeryville, PA 18936
FAX: 267-638-3081
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HEADWORKS INTRODUCTION
We have seen and solved just about every imaginable headworks problem in thousands of installations all
over the country. To solve your problem, we can draw on the broadest range of tested technologies
available. We sell everything from portable septage screens to massive bar screens, grit collectors, grinders,
and compactors. A brief outline of these technologies follows.
Our comprehensive collection of head-works technologies involves screens which range from:
-Widths of 1 to 30 ft.
-Depths to 200 ft.
-Chain and Rake, Cable, Catenary, Reciprocating Rake and Continuous Self-Cleaning Coarse and Fine.
-All of our screening systems can be supplied with a screenings compactor.
Our grit separator systems include many basic designs with various options:
- Chain and Scraper
- Simple Screw Type
- Large Chain and Bucket
- Vortex type
- All of these grit separators can be supplied with Grit Washing systems.
SCREENING SYSTEMS
We have entered an era of wastewater reuse and sludge recycling. Screens are no longer used just to protect
the downstream equipment, but are now critical to the removal of plastics from the wastewater stream, and
therefore, the sludge. With fine screening the undesired removal of organics and fecal matter is also a
concern. Therefore, washing and dewatering of the screenings is critical to maintaining a good screening
process.
Screens are classified for the most part as: Coarse Screens, Fine Screens and Micro Screens. (Increasingly,
treatment plants use a combination of coarse screens and fine screens.)
Coarse screens, with openings over 6 mm (1/4”), remove large solids, rags and debris from the wastewater.
Fine screens, with openings of 1.5 mm to 6 mm, are used to remove smaller materials and may significantly
increase downstream liquid and sludge processes, particularly in systems without primary treatment.
There are many types of mechanical bar screens, some of which are listed below:
- Chain and Rake Bar Screens
- Cable Operated Bar Screen
- Reciprocating Rake Bar Screens
- Catenary Bar Screens
- Continuous Self-Cleaning Screens
- Screw-type Screens
- Rotary Drum Screens
The quantity of screenings material that will be removed from the waste stream varies significantly, depending
on the opening that is established between the screening bars. Also, flow characteristics of the municipality
and type of collection system will affect the amount of screenings that are collected.
The quantity of screenings removed will also be affected by the length and slope of the collection system. The
use of multiple pumping stations may reduce the size of the organics received at the headworks. It can be
assumed that the volume of screenings removed may be greater with a short, gently sloping collection system
with little pumping and low turbulence. This difference stems from disintegration of solids exposed to long
periods of turbulence. The impact of turbulence will be especially significant for smaller bar screen openings.
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Composition, as well as volume, affects the disposal of screenings. Coarse screenings consist of rags,
sticks, leaves, food particles, bones, plastics and stones. With smaller openings (6mm and under)
cigarette butts, fecal matter and other organic matter may be included in the screenings.
Screenings normally contain about 10 to 20% dry solids and will have a bulk density of between 40 and 70
lb./cu. ft. Openings of 19mm, or smaller, should adequately protect downstream equipment. Smaller
openings between the screen bars will produce larger volumes of solids removal and can offer a greater
degree of protection for downstream equipment. (Caution should be used when selecting openings smaller
than 13mm for plants served by gently sloping gravity collection systems because of the potential for the
removal of unwanted fecal matter.)
Proper bar screen selection and sizing will insure satisfactory mechanical and process performance and
could increase the efficiency of downstream equipment and processes in the treatment plant. Criteria
usually used to determine the type of screen best suited for a particular application are as follows:
- Particle size and volume of screenings to be removed
- Flow variations and influent characteristics
- Minimum and maximum water levels
- Plant hydraulics and allowable headloss
As with most types of mechanical equipment, maintenance requirements and reliability are very important
aspects of design and equipment selection. When called upon to operate, the bar screen should be
expected to perform efficiently and effectively with a minimum of operator attention.
On the basis of operation and maintenance considerations, two narrow bar screens are recommended
over a single, wide screen. When two or more screens are used, the screening channel and screening
equipment should be designed so that one screen can be taken out of service without adversely affecting
the operation of the facility or the remaining screen.
Screen headloss and the volume of solids removed increases dramatically as the size of the screen
opening decreases. Therefore, the application of a fine screen requires a careful review of the plant
hydraulics and processes. This review is especially important in a retrofit installation where a coarse bar
screen is being replaced by a fine screen.
Large quantities of solids removal, attributed to fine screens, may result in a reduction of BOD levels by
5% to 25%, TSS by 15% to 30%, grease by 30% to 50%, and up to 90% of all floatables. If recognized by
the Engineer, this reduction in BOD could be reflected in the downsizing of downstream processes.
The various types of fine screens may be categorized and differentiated by the way they are positioned
relative to the flow, the screening medium used, or the cleaning mechanism employed.
When locating a screen the engineer needs to consider the effects of the backwater caused by the head
loss through the screen. Some installations include an overflow weir to a bypass channel to prevent
upstream surcharging if the screen becomes blinded.
The hydraulic consideration is very important in the screen design. The velocity distribution in the
approach channel has an important influence on the screen operation. A straight channel ahead of the
screen ensures good velocity distribution across the width of the screen.
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The engineer must ensure that the wastewater’s approach velocity to the screen does not fall below a self-
cleaning value, or rise enough to dislodge screenings. Extremely low channel velocities may result in the settling
of solids in the channel ahead of the screen. Ideally, the velocity in the approach channel should exceed 1.3
FPS, at minimum flows. This is to avoid grit and other solids from settling in the approach channel. Locating a
Parshall Flume down stream of the screen provides velocity control in the screen channel.
Solids settling in the channel, ahead of the screen, may hinder the operation of the screen, and in some cases
may damage or cause premature wear of the screen.
ITEMS TO BE CONSIDERED WHEN EVALUATING SCREENS:
- Hydraulic Efficiency
- Cleaning Efficiency
- Net Openings Between Bars
- Cycle Time
- Material of Construction
- Headroom Requirements
- Controls
- Ease of Maintenance
GRIT SYSTEMS
Grit removal is an important part of the wastewater treatment process. Grit removal has proven to be of value in
the reduction of maintenance costs of downstream equipment. Grit causes wear on pumps, clogs pipes and
channels and can take up valuable space in the sludge digestion tanks.
Depending on the type of grit removal process used, the removed grit can be further concentrated in a cyclone,
or specially designed washing type screws and then washed to remove lighter organic material captured along
with the grit. The washed grit can be more readily stored without odor problems and is more easily disposed of
than unwashed grit.
The quantity and characteristics of grit, and its potential adverse impact on downstream processes, are
important considerations in selecting a grit removal process. Other considerations include headloss
requirements, space requirements, grit removal efficiency, organic content and economics. A variety of grit
systems are available today. The basic categories are vortex type, chain and bucket (aerated & non-aerated),
chain and scraper (aerated & non-aerated), and aerated screw type.
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Grit particle sizes, for design purposes, have traditionally included particles larger than 65 mesh (0.008”) with a
specific gravity of 2.65. Removal of 95%, or greater, of these particles has always been the target of grit removal
design. Grit removal designs are now capable of removing up to 95% of 100 mesh (0.006”) to avoid their adverse
effects on the downstream processes.
Similar to screen designs, flow extremes must be identified so the grit chamber can be designed to efficiently
remove grit.
The quantity of grit entering the treatment plant is usually greatest during peak flows. Grit chambers are sized to
remove grit effectively at peak flows and to avoid removing excessive organic material at lesser flows.
GRIT REMOVAL
Removal of grit from the grit chamber can be done in many ways, depending on the type of grit system used. The
most common four methods that will automatically remove grit are:
- Screw Conveyor
- Chain and Bucket Elevators
- Clamshell Buckets
- Pumps
GRIT WASHING AND DEWATERING
After removing the collected grit from the grit chamber, the grit is normally washed to ease handling. In most
cases, a reduction in grit volume by removing the water contained in grit saves transportation costs and eases
transport and handling during disposal. Also, washing the grit to remove putrescible organic material makes grit
handling and disposal more manageable. Removing putrescible organic material prevents odors and nuisance
conditions caused by decomposition of organic material.
A Hydrocyclone Separator concentrates grit centrifugally, requiring a steady feed of the grit slurry at an inlet
pressure to the grit classifier of 5 psi to 20 psi. The constant feed rate will typically be within the range of 200 to
500 gpm, depending on the size of the cyclone. Cyclone separator sizing is based on the cycled feed rate and the
grit slurry solids concentrations. Cyclones work best at feed concentrations less than 1% solids. The centrifugal
action created in the cyclone separators increases the solids content to an average of 5% to 15%. Approximately
90% to 95% of the feed flow rate discharges through the vortex finder at the top of the cyclone. This flow volume
reduction saves transportation and storage and reduces the required size of the grit classifier. However, cyclones
are prone to clogging and may be replaced with specially designed grit classifiers.
Grit classifiers wash the grit by separating the putrescible organic from the grit. Classifiers are sized based on the
settling velocity of the particles to be removed, the feed flow capacity, and grit capacity. For a target particle size
and flow rate, the design engineer selects a minimum pool area (surface area) and overflow weir length. WSG &
Solutions, Inc. has a patented HFR washer design for flows to 400 GPM.
Classifiers, offered by major manufacturers, are inclined from 15 to 30 degrees from the horizontal. In addition to
slope, proper flight tip speed and pitch assist in particle removal. Hardened flight edges or abrasion resistant wear
shoes may be used to resist the abrasive action of the grit.
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Product Line Offerings
Screens CSO Applications
Cog Rake Bar Screens CSO Technik Biogest Pump Action Screens
Model GA CSO Technik Biogest VacFlush Systems
Model GB CSO Technik Biogest Alpheus Flow Limiters
Model GBD CSO Technik Biogest Flushing Gates
Rex® Series 1000 Screens CSO Technik Biogest Tipping Buckets
Rex® SDFR Screens
Rex® HDFR Screens
Dual Stream® Screens
Dual Stream® Perf. Screens Misc. Products
Link-Belt® 2-Rope Bar Screens
Link-Belt® 4-Rope Bar Screens Screw Compactors
Catenary Bar Screens - Shafted Compactors
Link-Belt® Thru-Clean Screens - Shaftless Compactors
Link-Belt® Tritor Screens Grit Screws
Link-Belt® Disc Screens Screw Conveyors
Link-Belt® Drum Screens - Shafted Screw Conveyors
Link-Belt® Heavy Duty Thru-Clean Screens - Shaftless Screw Conveyors
Steelguard® Fine Screens Belt Conveyors
Rotary Drum Screens Swingfusers (utilized with grit equipment)
In-Channel Screen-Basket Type Swingfusers Hoists (utilized with grit equip.)
In-Channel Screen-Drum Type Static Screens
Septage Units
Grit Removal
Rex® C&B Grit Collectors
Rex® C&S Grit Collectors
Link-Belt® CS Grit Collectors
Link-Belt® ASB Grit Collectors
Link-Belt® AS Grit Collectors
Link-Belt® ASP Grit Collectors
HFR Grit Washers
Link-Belt® SW Grit Washers
Link-Belt® SWC Grit Washers
Air Lift Pumps (used in Grit applications)
Aer-Degritter
Link-Belt “B” Grit Collectors
WSG Gritguard DIRECT Grit Removal System
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Link-Belt® GA Cog Rake Bar Screen
Front cleaning cog rake bar screens remove debris
from a fixed bar rack mounted in a channel. A single
carriage assembly descends to the bottom of the
channel where it cleans the captured debris from the
bar rack, and carries it upward where it is removed by
a wiper. The assembly then returns to the bottom,
repeating the cycle. Type GA cog rakes have the guide
shaft above the drive shaft and are for use in channel
widths up to 12 ft and water depth up to 9 ft. Openings
can be from 3/8” and larger.
Link-Belt® GB and GBD Cog Rake Bar Screen
GB cog rakes have the guide shaft below the drive shaft and are for channels from 4 to 12 ft wide and water
depth more than 9 ft deep. A variation of this is the GBD with dual drives and the ability to handle the large
debris and high flow rates of storm flow applications in channels from 12 to 30 feet wide. Openings can be
from 3/8” and larger.
GB Cog Rake Bar Screen GBD Cog Rake Bar Screen
Rex® Series 1000 bar screens
Rex® Series 1000 bar screens have rack widths
from 9 to 30 inches, discharge lengths to 15 feet
and bar openings from 1/4” to 1”. The units are
mounted with pivots to swing screen out of the
channel for service flows to 5 MGD.
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Rex® Standard Duty FR screens
Rex® Standard Duty FR screens are suitable for the
majority of municipal and industrial applications.
Sized for channels from 1 to 4 ft wide with a
maximum depth of 18 ft, these screens travel at 10
FPM and can be timed for 24-hour operation with
automatic start-stop intervals. They may he supplied
with debris compactors. Non-metallic chain and
sprockets are also available. Bar openings can be
3/8” and greater.
Rex® Heavy Duty FR screens
Rex® Heavy Duty FR screens may he used in
channels from 1 to 10 ft wide, 45 ft deep. Like the
Series 1000 and Standard Duty FR screens, the
rakes clean bars from the front. Heavier chains are
provided for greater load carrying capacity. Non-
metallic chain and sprockets and stainless steel chain
are also available. Bar openings can be 3/8” and
greater.
Link-Belt® Thru-Clean bar screens
Link-Belt® Thru-Clean bar screens use a “clean-
from-the-back” design for efficient, complete
removal of trash and large solids. Compact design
is suitable for low head room installations in
channels from 2 to 10 ft. wide. Multiple rakes
increase capacity. Bar openings can be 3/4 inch
and greater.
Link-Belt® 2-Rope and 4-Rope screens
Link-Belt® 2-Rope and 4-Rope screens have a
fixed bar rack and are front cleaned screens with a
history of dependable performance in deep channel
applications. The 4-rope, vertical or inclined screen
design has bar openings as small as 1/2 in, and an
ability to operate in channels up to 20 ft wide and
200 ft deep, with the capability of digging into and
removing grit. The two-rope, inclined screen is
designed for shallower channels and provide up to
10’-0” wide applications. Both can be operated
continuously or intermittently.
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Catenary bar screens
Catenary bar screens are often used in unattended operations
such as CSO control facilities where loads are often heavy and
varied. Sprockets, bearings and shafts are all above the water
level, reducing corrosion and damage potential. The rakes bear
against the face of the bars by catenary action of the chains.
Being unguided, rakes easily ride over obstacles and can be
provided in widths from 2’-0” to 25’-0”. Bar rack openings are 1/2”
and larger.
Steelguard® Screen
Steelguard® fine screens, utilize heavy-duty stainless steel rotating
grid assemblies to perform the process of screening and removal
of debris found in influent channel flow to wastewater plants. The
grid assemblies consist of pivot shafts, screen elements, guide
links and spacers and each grid section can be easily removed.
These fine screen models are continuous loop, self-cleaning fine
screens, utilizing stainless steel filter elements in a high-strength
assembly. As the flow passes through the stainless steel grid
assembly, debris is captured and elevated to the discharge point.
The majority of captured material is removed by a primary spray
system, utilizing fan spray nozzles, and then by a secondary
rotating brush assembly. Discharged debris and washwater is
captured in a transfer conveyor, or a screw compactor. The design
offers lower operating headlosses and the ability to handle a wider
range of flow variation. The significantly stronger stainless steel
components utilized within the grids, offer superior performance
over non-metallic grid components offered by other manufacturers.
Openings can be 1/4” and larger.
Dual Stream® Screen – Replaceable Panel
This continuous, self-cleaning filter type screen allows flow to pass through the bottom and both sides of the filter
screen assembly. With the use of an integral screw compactor, the captured debris is also dewatered and
compacted after removal from the waste stream. The Dual Stream Screen features a direct drive and removable
Snap-Lock® screen panels providing the option to use either 1/4”, 3/8” or 1/2” openings. Nine different sizes are
available from 24” x 24” to 36” x 36” for channels as narrow as 3’ and as deep as 25’.
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Dual Stream® Perf Screen – Perforated Panels
Unique among our screens is the Dual Stream in which the screen elements are oriented parallel to stream flow.
Flow enters the center of the screen and passes through both sides and the bottom. The continuously rotating
screen carries the debris to the top where it is removed by gravity-assisted washing. It is then dewatered and
compacted prior to disposal. The free water with liquefied organics returns to the stream. Dual Stream screens are
available in a range of sizes for installation in channels from 2-1/2 ft and wider. Maximum channel depth is 25 ft.
Screen grid openings range from 2 mm to 6 mm.
Drum Screens
The drum screen is designed to present a clean screening surface to the oncoming wastewater stream at all times
while in operation. The drum screen is designed for minimal headloss at peak flow. Spray piping is arranged for both
internal as well as external sparging and shall include necessary solenoid valves and controls for sequential washing
of the grid. The inlet pipe will connect to the inlet pipe connection of the rotary drum screen. Internally fed drum
screens can be provided with 500 microns to 6 mm openings. Externally fed drum screens can be supplied with 250
microns to 2.5 mm, all wedge wire screening media.
EXTERNALLY FED INTERNALLY FED
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In-Channel Screens
The In-Channel Screens are ruggedly designed for ease of
maintenance and versatility. With a wide variety of sizes and
options, we are able to be a complete supplier for most size plants
capable of handling flows up to 7 MGD. The openings can be 2 mm
to 6 mm.
Our units incorporate a variety of screen types, including punched
and drilled. The screens incorporate a high strength shaftless
screw, full length, with replaceable stainless steel sectional flights
and brushes at the inlet. The shaftless technology eliminates
clogging. Three cleaning zones help wash the material as well as
keeping the tube clean. A compaction zone reduces the volume of
material by 50%.
Screw Compactor with Wash Module
Screenings are introduced to the compactor through a hopper. As
the screw rotates the material, gravity and surface friction react to
force water from the screenings. The resulting compacted plug is
forced out of the discharge of the screw. The unit can also be
furnished with a bagger to remove odors.
The compactor’s direct drive system eliminates belts, chains and
thrust bearings. The internal screw conveyor is closely fitted to an
adjustable perforated plate zone, to aid in effective cleaning,
screenings transfer and compaction. The perforated zone is fully
housed in a formed stainless steel sheet metal drain pan
assembly. Available in 9 in diameter, the screw compactor can
process up to 75 cubic feet per hour.
Hubert Drum Screen
Due to its cylindrical shape the drum screen can handle large
differences in water level. The Hubert drum screens are designed
with patented A-shaped spokes resulting in high rigidity and
resistance to deformation. This produces an accurate fit against
channel walls, enabling filtration of particles down to 500 Microns.
Drum screens are available in coated or stainless steel. All Hubert
rotary drum screens are equipped with maintenance free bearings.
Rotary drum screens of the A-shaped spoke design can be supplied
in diameters of 5 to 16 meters with widths varying between 2 and 5
meters.
Hubert Micro Screen
Fine Screens are available in diameters of 0.8 to 4.0 meters and
widths of 1.2 to 6 meters. The screen mesh varies from 25 micron to
500 microns at a capacity up to 40 MGD. The Hubert fine screen
consists of a drum frame on which a number of screen panels are
clamped. The screen panels are made of plastic or stainless steel,
depending on the application and requirements. A simple clamping
mechanism makes the exchange of screen panels an easy job. The
stationary hollow shaft with funnel-shaped debris collector (s) is also
made of stainless steel and mounted in maintenance-free plastic
bearing bushings. The drum is driven by a wear-resistant nylon rim
gear and pinion. The composition of the water to be treated
determines the type of stainless steel.
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Rex® Type C&S Grit Collectors
Rex® Type C&S Grit Collectors can be used in plants with
flows up to 5 mgd per channel. The chain and scraper
system moves across the chamber bottom and up an
incline where the grit is deposited into a receptacle. Tanks
may be from 2-1/2 to 4 ft wide and up to 36 ft long. This
collector can also be designed to use the Rex® Gritreat
System to aerate the chamber. With Gritreat, a baffle
extends along the length of the chamber parallel to the air
headers and slightly below the surface of the water. Air
from the headers draws the flow under the baffle and back
up into the chamber, essentially spiraling the flow under
and over the baffle and through the length of the chamber.
Models are also available with non-metallic components.
Rex® Type C&B Grit Collectors
Rex® Type C&B Grit Collectors use a chain and bucket
design which scrapes the grit toward the influent end of
the chamber and elevates it to a discharge point where it
is deposited into a grit washer, conveyor or truck. With
tank widths from 3’-2” up to 10’ and lengths from 20 to
80’, flows can be as high as 40 mgd. It may be operated
as a non-aerated system or it may use the Rex®
Gritreat aeration design in the same way as the Rex®
chain and scraper collector. Models are also available
with non-metallic components.
AS Grit Collectors
An AS (aerated straightline) system is the perfect
answer for small chambers and flows up to 10 mgd. The
system consists of a hopper with inclined screw and grit
washer. Compressed air is provided through diffusers to
create and maintain uniform velocities of approximately
1.0 to 2.0 fps across a range of flow rates.
The Longitudinal grit screw collector can convey grit
which settles in the grit chamber to a special hopper
section for removal by the grit pump. The grit pump
discharges into a screw washer and cyclone. The
grit chamber is aerated to enhance separation of grit
and organic matter. The collector can have a flow of
1.5 MGD and up. Air is used to maintain uniform
circulating velocity. The screw will move the grit to
the pump suction location
ASP Grit Collector
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ASB Grit Collectors
Type ASB systems use a longitudinal screw at the chamber
bottom to convey grit to a bucket elevator for lifting and
discharging above the water level. A screw washer is
typically used at that point to ensure minimum putrescible
and water content in the discharge. Swingfuser style
aerators can be used to provide maintenance accessibility
to diffusers without draining the chamber. If flows exceed
60 mgd or higher grit volumes, a separate drive for the
lower grit screw can be supplied. The ASB can also
operate by removing the bucket and elevator and adding a
pump to become our ASP model.
Link-Belt® S Grit Collector
The Type S can handle flows from 1 MGD up to 80 MGD. The
unit consists of a long narrow chamber equipped with a collector
having pitched flights. The flights turn the settled grit and debris
over and over and discharge it into an inclined washing and
dewatering screw conveyor at the influent end of the chamber.
The action and speed of the collector ensures positive grit
collection, and at the same time, keeps most of the putrescible
organic material in suspension so that it will float out of the
chamber. The washing and dewatering screw tumbles the
material delivered to it by the collector and separates the grit
from the light putrescible.
The flights are equipped with easily replaceable, hardened and
abrasion-resisting wear shoes. Idler sprockets, or tracks with
renewable, wear-resisting steel flats are provided to support the
flights.
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SW and SW-C Grit Classifiers
Grit Classifiers will dewater and classify grit to a low putrescible content. When grit is removed in a dry state, water is
added in the grit classifier to float out the putrescible matter. The grit is then removed by the screw. At small plants,
the grit classifying will be only for a short period every day and, therefore, fresh water can be used. At larger
installations, where greater volumes of water are required, the plant’s effluent may be used. There are six sizes of grit
classifiers. Normally, the size used should be selected on the basis of the volume and particle size of the grit to be
handled. This will establish the volume of wash water required. If a greater volume of water is required to convey the
grit to the classifier than that required for merely washing the grit, the surface area and the size of hopper should he
increased or a cyclone used.
A cyclone is used in conjunction with grit washers when sludge and grit are to be separated or where the rate of water
to convey the grit would dictate an excessively large classifier. Here the cyclone concentrates the grit and the SW is
used for grit dewatering.
HFR Grit Washer
The HFR High Flow Rate Grit Washer was developed
specifically to handle flow rates from 100 to 400 GPM. The
units will guarantee 95% removal of 150 mesh grit at 200
GPM or 100 mesh grit at 400 GPM. Four standard models
are available as well as special designs.
The HFR performance is accomplished effectively by
immediately redirecting the inlet stream to create predictable
flow patterns which promote rapid separation and settling of
grit particles. The heavy inorganic grit is forced to settle and
in turn be conveyed and dewatered by the screw while lighter
organics are carried over the discharge weir to be returned to
the treatment process flow. Dual adjustable weirs are
standard.
Hydraulic model studies can be accomplished to handle
special applications.
The HFR units eliminate the need for cyclones typically
applied to grit removal applications. Cyclones are prone to
clogging, require maintenance and increase pump
horsepower.
The HFR units are shop assembled, tested and
shipped completely assembled. Various materials
of construction are available.
SW-C Grit Classifier
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GRITGUARD™ “DIRECT” GRIT REMOVAL SYSTEMS
(Diffused Inlet Redirected Energy Chamber Technology)
- Complete packaged systems, ideal for small
plants
- Flows from .25 MGD to 10 MGD
- No in-tank mechanical equipment or
maintenance
- Small overall system footprint with low cost
tank construction requirements
- 50 years and hundreds of installations of proven tank configurations used with AS grit
collectors
- Over 5 years and 100 installations incorporating
our proprietary baffling designs (also utilized in
our HFR Grit Washers)
- In-field/site and lab testing to support the
proven Airlift pump for improved performance in
grit applications.
Proprietary Proven Components:
Tank and Baffle geometry especially designed
using state of the art computerized modeling
- HFR Grit Washer incorporating our “Posi-Seal”
bearing
VACFLUSH SYSTEM
The Vacflush System is suitable for Storm overflow tanks, CSO, storm
storage tank, sewer storage system and retention tank
Principle Benefits
All of the component parts are above the tank and therefore can be
maintained without the need for hazardous man entry into a confined space.
Ability to completely flush the tank even if the storm tank only partially fills.
Low running and maintenance costs.
Utilizes storm water as the flushing media to avoid the use of potable water.
System does not impinge on storage volume thereby keeping tank size to a
minimum.
Flushing system can be used as the central support for the tank roof in
circular tank installations.
CSO EQUIPMENT
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TIPPING BUCKETS
- Low cost flushing system for smaller basins
- Simple robust design
- No power required
- Manual or auto fill
- Stainless steel construction
- Sealed for life bearings
- Complete design service
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The storm begins. Combined
sewage and rain water spill
into the storage chamber and
rise above the water level of
the inlet to the flushing
system.
The vacuum pump starts
automatically drawing water
from the storage chamber
into the flushing chamber.
Once the maximum level in
the flush chamber is reached,
the vacuum pump stops
automatically.
Vacflush System Operation No. 1
Vacflush System Operation No. 2
The storm subsides and the
storage chamber empties,
leaving sludge and other
sewage-related debris on the
chamber floor.
Once the tank is empty, the
flushing sequence starts
automatically. The large
volume of water surges from
the flushing chamber driving
all of the solids from the
chamber floor.
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• The PAS Screen is designed to retain solids greater than
6mm diameter in two directions from combined sewage or
storm water, to prevent discharge to the receiving waters.
The screenings are retained in the normal flow to the
treatment plant.
PUMP ACTION SCREEN
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Principle Benefits of the Pump Action Screen
- National CSO Test Facility, Wigan – Test Result 58% SRV
- Can be maintained from ground level without hazardous man entry
- No wearing parts in the screen basket
- Proven effective cleaning
- No moving parts in the screen basket
- Auto operation
- Minimal servicing
- Easy to retrofit
General Overview of the Pump Action Screen
- Screen Diameters: 300 & 500 mm
- Max Length: up to 6.000 mm
- Pump Options: Oil or Water Cooled, (can be guiderail mounted
for ease of maintenance)
- Max Flow Rate: 1766l/s Single Screen
- Multiple System options for Higher Flows
- Typical Power Required: 2.2 - 6 kW
- Screen Loading Rate 300l/s/m2 at 50% Screen Blinding
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FLOW LIMITERS
Alpheus “AT”
Suitable for:
Flows – Up to 438 l/s
Sizes – Up to DN500
Circular or rectangular
chambers
Dry or Semi Dry
Installation
• No power supply required
• Automatic de-blocking
• Constant pass forward flow, with accuracy of
+/- 5%, irrespective of upstream water head
• Minimal maintenance
BENEFITS OF THE ALPHEUS RANGE
Curve
Inlet Flange
Float
Float Fixings
Control lever
Inlet Plate
Outlet
Outlet Control Plate
Positioner
Yoke
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FLUSHING GATES
Flushing System Type KS
-Flushing gates are ideal for open tanks where confined space
entry is not required.
-The gates are closed to hold back a volume of water which is
then used to flush the tank after it has emptied.
-Gates are closed using double or single acting hydraulic
cylinders.
Benefits of the Biogest Gates system
-Long Hooks assist closure of gates when debris is present
-Double acting cylinder allows greater flush volume to be
retained for a more effective flush
-Polyethylene can be used for the opening gates section
reducing the manufacturing cost without damaging integral
strength.
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WSG & Solutions, Inc.
160 Commerce Drive, Suite 100
Montgomeryville, PA 18936
Phone: 267-638-3000
Fax: 267-638-3081
Web: wsgandsolutions.com
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