This schedule specifies requirements for the Hydro-Brake® Optimum S and C type vortex flow control devices manufactured by Hydro International Ltd. The S-type is primarily used for stormwater flow control and the C-type is used for combined sewer flows and high volume stormwater applications.
The S and C type stainless steel device sare applicable with a design flow rate between 1.0 and 60 litres per second and 3.0 and 60 litres per second respectively. Design head is between 0.4 m and 4.0 m and 0.25 and 4.0 m respectively. It is not applicable to devices with a design discharge greater than 60 litres per second.
The Hydro-Brake® Optimum device controls fluid flow by hydraulic effect without moving parts. At low flow rates the device does not restrict flow. As flow increases, hydrostatic pressure increases creating a vortex within the device.
Full details can be found in the Assessment Schedule.
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