To assess the FP McCann StormBrake vortex flow control system which is applicable to surface water applications with design flows from 3l/s up to 40 l/s, with a hydrostatic head of range of 0.4m to 2.0 m.
The system is designed:
to control the rate of discharge of surface water from attenuation tanks or other storage. The flow rate is achieved by creating a vortex in the outlet once a defined head of water is reached.
for a given location based upon allowable discharge, pipe sizing and water level. The system is fabricated entirely from stainless steel other than the backing plate and door seals.
Full details can be found in the Assessment Schedule opposite.