Downstream Defender0 pages

Downstream Defender®
An advanced vortex separator with an outlet pipe that can be orientated to suit actual
site conditions.
Inlet
Product Profile
The Downstream Defender® is the most advanced hydrodynamic
vortex separator available for the removal of sediment, oil and
floatables from stormwater runoff. The Downstream Defender® is
proven to be more efficient than other structural treatment devices
with a much reduced footprint and is the only separator with
internal components proven to prevent pollutant re-entrainment
(or washout).
Outlet
Advantages
•t
•t
•t
•t
•t
•t
•t
•t
•t
High removal efficiency over a wide range of flows.
Proven to prevent pollutant re-entrainment.
Able to incorporate a change in pipe direction from 90 to 270
degrees.
Low system headloss.
Internal bypass with high flow capacity.
No moving parts and no power requirement.
Consolidates maintenance to a single location.
Independently tested and verified performance.
Approved by regulatory agencies throughout the world.
Applications
•t
•t
•t
•t
•t
Control of sediment,
floatables and petroleum
products.
Highway runoff.
SuDS schemes.
Wetland schemes.
Basin and pond
protection.
•t
•t
•t
•t
•t
Park & Ride schemes.
Watercourse protection.
Industrial and commercial
areas.
Vehicle maintenance
washdown yards.
Quarry settlement ponds.
Physical Properties / Performance
Diameter of
Unit
DN (mm)
Treatment Flow Rate Hydraulic Capacity
*
of Chamber +
l/s
l/s
Inlet / Outlet Pipe
Diameter
mm
Oil Storage
Capacity
litres
Sediment Storage
Capacity
m3
1200
21
120
300
270
0.7
1800
51
300
450
1350
1.7
2550
115
600
600
2500
3.8
3000
160
750
750
4650
4.4
*t The table above shows the Treatment Flow Rates at which typical removal efficiencies of greater than 80% are achieved for oil and sand.
+ The hydraulic capacity of the chamber is the maximum flow that can pass through the chamber without surcharge to upstream network.
A major portion of the pollutant materials tend to be included in the first flush of the runoff during a storm event, as flow rates build up.
Therefore with a correctly sized unit, the vast majority of solids and hydrocarbons can be removed and retained within the unit.
Headloss at Treatment Flow is typically less than 150 mm.
www.hydro-int.comtStormwater® Hotline: 01275 337977