Downstream Defender information - Hynds …

1 Technical Guide EVS 3 The go to organisation for stormwater, industrial waste, and wastewater engineered systems2016 | ENVIRONMENTAL | EVS 3 Downstream DEfENDERP rovides high removal efficiencies of settleable solids and floatable material over a wide range of flowratesDownstream Defender (Stormwater Treatment)Applications Roads, carparks, commercial propertiesPorts, airports, construction sitesIndustrial and commercial facilities Offline and online treatment of existing stormwater reticulationProduct AttributesRemove up to 60-90% Total Suspended Solids (TSS) with a mean particle size of 150 micronsRemoves sediments, floatables, oils and greaseNo re-entrainment of previously captured pollutantsSmall footprintApprovals/StandardsNJCAT NZS3109, Concrete ConstructionQualityISO 9001:2008 Quality Management StandardScan for more informationScan for more informationDesigned to meet most stormwater regulations, the Hynds Downstream Defender uses a vortex that is induced from the incoming tangential flow.

2 Pollutants are directed towards the sump of the chamber while treated flows travel around the inner annulus to the outlet. Design and SizingThe Hynds Downstream Defender is sized to treat either a specified catchment area or a design flow rate to meet a water quality design for first flush treatment. Systems vary in diameter from 1200mm to components are installed in a standard precast concrete manhole manufactured to AS/NZS and NZBC requirements. The internals, inlet pipe and outlet pipe are installed at the factory. The device is plug and play and can be installed as would be a manhole, with placement in the prepared excavation direct from a : Large diameter Downstream Defenders may require an onsite crane to lift into prepared excavation refer to Table 1 for indicative 1 Downstream Defender variantsDiameterDescriptionWeight (T)Lid and Cast Iron (T)12001200x2100H flanged Based flanged Based Manhole7.

3 25502550x3950H flanged Based 30003000x4200H flanged Based 2 Key parametersUnit Size (mm)Design Flow (L/s)Capacity Flow (max) (L/s)Inlet Pipe Diameter (mm)Outlet Pipe Diameter (mm)Head-loss at Design Flow (mm)Head-loss at Capacity (mm)Min Sediment Storage (m3)120 0208530030011. 52 07. 8 7. 3 Downstream Defender | enVIronmenTAl | PG 2 How it works1. Dip Plate Cylinder Acts as an oil/floatables outlet Pipe Discharges treated stormwater from the inner As the flow spirals around the vertical axis, sediment settles towards the base and is swept inward, along the benching skirt. Sediment then passes under the centre cone into the quiescent storage zone, beneath the vortex floatables lid This covers the treated stormwater in the inner annulus between the dip plate and centre shaft. It isolates the oil/floatables collection zone, located between the dip plate and the manhole wall, from the treated Tangential Inlet Pipe Generates rotational flow.

4 (see GA diagram)6. As the main flow is directed inwards and upwards, the centre cone provides shelter for stored sediment, preventing Downstream Defender chamber remains wet between storm events*. Oil and floatables are stored on the water surface and in the outer annulus, which is separate to the sediment storage : (*) Maintaining water in the sump prevents stored sediment from solid solidfying in the base of the 1 Cut away example of a Downstream Defender 1200 series134562eVS 3 Downstream Defender | enVIronmenTAl | PG 3 Disclaimer: While every effort has been made to ensure that the information in this document is correct and accurate, users of Hynds product or information within this document must make their own assessment of suitability for their particular application. Product dimensions are nominal only, and should be verified if critical to a particular installation. No warranty is either expressed, implied, or statutory made by Hynds unless expressly stated in any sale and purchase agreement entered into between Hynds and the user.

5 'S' Bend30 L300mm PipeBCollarend - InletSpigot end- OutletAD Section ViewECPlanScale: 1:25 Spigot end -OutletCollar end -InletManhole Riser withFlange baseA-A-Ductile Iron Frame & Opening( 600mm Clear opening)605fIG. 2 General arrangement drawingTAble 3 oil storage capacityUnitTotal Oil Storage (L) Oil Clean - Out Depth (cm)DD 120 0265<41DD 1800818<58DD 25502044<84DD 30003975<107 TAble 4 Downstream Defender - dimensionsProduct CodeLid OpeningsDimensionLid Thickness (mm)Mass Total(T)S Bend DimensionsShipped fromA (mm) B (mm)C (mm)D (mm)E (mm)Diameter (mm)Total length, L (mm)DD120 0 KIT11647115 : Each chamber comes complete with a concrete lid, ductile iron cover and frame. Suggested invert level is indicative only and may vary depending on inlet/outlet invert to finsh floor levels.

6 Prices may vary depending on your location. Please note when S bend is connected to chamber, the inlet invert depth will match the outlet invert go to organisation for stormwater, industrial waste, and wastewater engineered systemsBranches Nationwide Support Office & Technical Services 09 274 0 316eVS 3 Downstream Defender | enVIronmenTAl | PG 4