Deflective
Screening Device

HYDRODYNAMIC SEPARATOR

The Deflective Screening Device is a highly effective screening hydrodynamic separator designed to meet trash full capture requirements along with providing efficient hydrodynamic separation. It utilizes a unique and effective non-clogging screening design that has opposite facing openings from the flow direction of incoming water and ensures high treatment flow rates are maintained.

BMPs Advantages

  • Meets Full Trash Capture Requirements
  • Non-Clogging Screening Technology
  • In-line Design Allows for Internal High Flow Bypass
  • 100% Noncorrosive Internal Components
  • Low Cost Alternative to More Expensive Deflective Shield Separators
  • Easiest Separator to Maintain With Easy Access to Sump Chamber Using Standard Vac Hose
  • Made in the USA

Technical Details

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Operation

Stormwater runoff may enter the DSD via one or more inlet pipes or by grated inlet. Water enters the inlet bay where it is directed to the curved inlet channel. This channel is curved and directs flow into the vortex chamber at an increased velocity along its inner wall creating a clockwise flowing vortex. This vortex helps to capture all trash, debris and suspended solids in the center of the chamber. This vortex continues downward into the screening cylinder area of the device. The water flow caused by the vortex creates a “self-cleaning” effect along the surface of the screen preventing clogging of the screen. As treated water passes through the screen it rises toward the outlet. The Oil baffle traps and retains oils, grease and other hydrocarbons from flowing toward the outlet. Flows above the screen capacity bypass over the weir and straight to the outlet pipe. This configuration prevents any scouring of previously captured trash or sediment during higher flows.

Performance

Removal of Trash 100%
Removal of Hydrocarbons 90%
Removal of TSS 80%

Maintenance & Installation

Installing the DSD is quick and easy. The system is composed of a base section, middle riser with holes for pipe connections and internals pre-installed, a top, risers to bring access to finish surface and access covers. Installation of the system follows the same procedures as standard manhole installation. We carry the structures in inventory allowing for short lead times to meet you project schedule.

Installing the DSD is quick and easy. The system is composed of a base section, middle riser with holes for pipe connections and internals pre-installed, a top, risers to bring access to finish surface and access covers. Installation of the system follows the same procedures as standard manhole installation. We carry the structures in inventory allowing for short lead times to meet you project schedule.