hydrodynamic separation

HYDRODYNAMIC SEPARATION
Hydrodynamic Separation
Products
High performance hydrodynamic
separation products are reliable, easy
to install, and offer proven
stormwater pollutant removal.
Discover the advantages of
hydrodynamic separation whether
you're looking for a stand-alone
treatment device or a treatment train.
Why Hydrodynamic Separation?
• Remove sediment, floatables, and
free oil and grease
• Widely accepted for effective
solids removal
• Small footprint for treated flow
rate
• Delivers treatment with minimal
headloss
• Documented performance
through laboratory and
independent field testing
• Underground, traffic-rated BMP’s
maximize land use
About CONTECH Stormwater
Solutions by Armtec
When you select CONTECH Stormwater
Solutions, you'll get much more than
stormwater management products.
You'll have dedicated, knowledgeable
engineers and technical experts to help
you select the right technology to
meet your regulations. Our
organization is committed to
preserving water resources by
providing customized, site-specific
stormwater treatment solutions. And
every product is backed by the most
comprehensive lab, field and
independent testing in the industry.
Vortechs®
• High performance hydrodynamic
separation widely accepted
for solids removal makes
permitting easier
• Removes a wide range of
pollutants - including sediment,
trash, free oil and grease cost effectively
• Treats peak flows without
bypassing
Target Pollutants
• Total suspended solids larger than
50 microns
• Free oil and grease
• Trash and debris
• Sediment
Applications
• Commercial, municipal,
residential and industrial sites
• High-density and single-family
residential sites
• Maintenance, transportation and
port facilities
• Parking lots
• Arterial roads
• Freeways
VortSentry®
• Proven performance verified
through third-party testing
• Shallow system profile and
unique horizontal design makes
installation easier and less
expensive
• Flexible design fits multiple site
constraints and accommodates a
wide range of treatment options
• Compact design ideal for
congested sites
• Houses an internal bypass and
treatment in one structure
• Lightweight design eases
installation
• Unobstructed maintenance access
typically does not require
confined space entry
3
Vortechs®
High flow hydrodynamic separation
The Vortechs system is a highperformance hydrodynamic separator
that removes sediment, particles, free
oil and grease. The design allows for
easy inspection and unobstructed
maintenance access.
Each Vortechs system can be designed
in accordance with local regulations
or by using the Rational Rainfall
Method™. This method combines
site-specific information, including
local historical precipitation records
and laboratory-generated performance data (corroborated by thirdparty field studies) to ensure accurate
long-term performance. It can also be
used to estimate annual hydrocarbon
load reductions.
A typical system is sized to provide an
80% load reduction based on
laboratory-verified removal
efficiencies for varying particles size
distributions such as 50-micron
sediment particles.
How does it work?
Water enters the swirl chamber at a
tangent, inducing a gentle swirling
flow pattern and enhancing
gravitational separation. Sinking
pollutants stay in the swirl chamber
while floating pollutants are stopped
at the baffle wall. Flow rates are
controlled through the system by the
low flow control, which reduces
HIGH FLOW CONTROL
SWIRL CHAMBER
OUTLET PIPE
INLET PIPE
OUTLET CHAMBER
LOW FLOW CONTROL
FLOATABLES CHAMBER
inflow velocity. In most applications
the Vortechs system is designed to
operate at the low flow rate, since
this accounts for 80% of the annual
runoff at most sites.
During larger storms, the water level
rises above the low flow control and
begins to flow through the high flow
control. The layer of floating
pollutants is elevated above the
influent pipe, preventing
re-entrainment. Swirling action
increases in intensity in relation to the
storm, which helps maintain high
FLOATABLES BAFFLE WALL
sediment removal rates. When the
storm drain is flowing at peak
capacity, the water surface in the
system approaches the top of the
high flow control. The Vortechs
system will be sized large enough so
that previously captured pollutants
are retained in the system even
during these infrequent events.
As a storm subsides, treated runoff
decants out of the Vortechs system at
a controlled rate, restoring the water
level to a dry-weather level equal to
the invert of the inlet and outlet pipe.
Besides facilitating inspection and
cleaning, the low water level
significantly reduces maintenance
costs by reducing pump-out volume.
Vortechs®
• Proven performance speeds approval process
• Rational Rainfall Method predicts optimal size
• Flow controls reduce inflow velocity and increase residence time
• Unobstructed access simplifies maintenance
• Shallow system profile reduces site excavation
• Very low headloss
VortSentry®
Hydrodynamic separation with internal bypass
The VortSentry® is a hydrodynamic
separator with a small footprint that
makes it an effective treatment
option for projects where space is at
a premium and efficiency is critical.
The internal bypass ensures
treatment chamber velocities remain
low, which improves performance
and eliminates the risk of
resuspension.
higher flow rates, a portion of the
runoff spills over the flow partition
and is diverted around the treatment
chamber, filling the head equalization
chamber. This collapses the head
differential between the treatment
chamber and the outlet, resulting in a
In addition to stand-alone
applications, the VortSentry® is an
ideal pretreatment device. The system
is housed inside a lightweight
concrete manhole structure for easy
installation (often without the use of
a crane) and unobstructed
maintenance access.
relatively constant flow rate in the
treatment chamber even with a
substantial increase in total flow
through the system. This further
reduces the potential for resuspension
or washout of captured pollutants.
FLOW PARTITION
INLET APERTURE
INLET PIPE
How does it work?
Stormwater runoff enters the unit
tangentially to promote a gentle
swirling motion in the treatment
chamber. Settleable solids fall into the
sump and are retained. Buoyant
debris and oil and grease rise to the
surface and are separated from the
water as it flows under the baffle
wall. Treated water exits the
treatment chamber through a flow
control orifice located behind the
baffle wall.
OUTLET PIPE
TREATMENT
CHAMBER BAFFLE
HEAD EQUALIZING
BAFFLE
OUTLET FLOW CONTROL
ORIFICE
TREATMENT
CHAMBER
During low-flow conditions all runoff
is diverted into the treatment
chamber by the flow partition. At
VortSentry®
• Internal bypass and treatment in one structure
• Compact manhole design
• Unobstructed maintenance access
• Round, lightweight construction
SEDIMENT STORAGE
SUMP
Available Models
Use this table to identify the appropriate model for your site. Our Technical Sales department is available to assist with your project.
Vortechs
Model
Internal
Length
ft
m
Peak Treatment
Flow
cfs
l/s
Max Size
Inlet/Outlet
in
mm
Sediment
Storage
yd3
m3
1000
3
0.9
9
2.7
1.6
45
15
375
0.7
0.5
2000
4
1.2
10
3.0
2.8
80
18
450
1.2
0.9
3000
5
1.5
11
3.4
4.5
130
24
600
1.8
1.4
4000
6
1.8
12
3.7
6.0
170
30
750
2.4
1.8
5000
7
2.1
13
4.0
85
240
36
900
3.2
2.5
7000
8
2.4
14
4.3
11
310
36
900
4.0
3.1
9000
9
2.7
15
4.6
14
400
42
1050
4.8
3.7
11000
10
3.0
16
4.9
17.5
500
48
1200
5.6
4.3
16000
12
3.7
18
5.5
25
710
48
1200
7.1
5.4
VortSentry
Model
1
Swirl Chamber
Diameter
ft
m
Diameter
ft
mm
Typical Depth
(below invert)
ft
m
80% Water
Quality Flow1
cfs
l/s
Max Size
Inlet/Outlet
in
mm
Sediment
Storage
yd3
m3
VS30
3
0.9
5.5
1.7
0.26
7.40
12
300
0.8
0.6
VS40
4
1.2
6.7
2.0
0.58
16.4
18
460
1.4
1.1
VS50
5
1.5
7.6
2.3
1.07
30.3
18
460
2.2
1.7
VS60
6
1.8
8.5
2.6
1.77
50.1
24
600
3.1
2.4
VS70
7
2.1
9.4
2.9
2.70
76.5
30
750
4.3
3.3
VS80
8
2.4
10.2
3.1
3.90
110
36
600
5.6
4.3
Treatment flows based on 80% removal of OK110 silica sand.
Support & Maintenance
Our goal: to remove stormwater pollutants
Note: Larger models may be available in your area
• Drawings and specifications are available at
contechstormwater.com.
• Design support is available from our Technical Sales
Engineers, to provide site-specific solutions.
• Full maintenance services are available to maximize
performance and ensure long-term product viability.
Head Office: 370 Speedvale Ave.W., P.O. Box 3000, Guelph, ON N1H 6P2
www.armtec.com
Nanaimo, Prince George, Vancouver, Edmonton, Calgary, Lethbridge, Saskatoon,
Winnipeg, Thunder Bay, Sudbury, Guelph, Toronto, Peterborough, Chesterville,
Forest, Orangeville, Comber, Montreal, Quebec City, St. Clet, Sackville, Truro,
Bishop’s Falls and St. John’s.
The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,985,157; 6,027,639; 6,350,374;
6,406,218; 6,649,048; 6,991,114; related foreign patents; or other patents pending.
Vortechs and VortSentry are trademarks or registered trademarks of CONTECH Stormwater Solutions Inc.