In
Brief:
| The Flo-Gard™ Dual Vortex hydrodynamic separator provides enhanced gravity separation of suspended stormwater pollutants in a compact configuration. Particle settling or flotation is accelerated by centripetal forces induced by the tangential flow pattern augmented by a highly circuitous flow path. The unit uses two independent cylindrical separators: Low flow is diverted by the inlet to the first separator, while moderate flow begins to overflow the first control weir and enter the second separator. Settled particles collect in the bottom storage area of the unit which is isolated from the fluid outlet, minimizing resuspension. Floating debris and oils are temporarily held at the top of each separator and deposited in the upper storage area by peak storm events. Once the unit treatment capacity is exceeded, excess flow breaches a second control weir at the inlet and passes through the bypass pipe without decreasing the treatment flow or re-entraining captured pollutants.
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