16-001014-02A (Ultimate SCMMP)

                                                                                                                           HumeGard® GPT
Variants                                                     Figure 2 – Super-critical HumeGard® GPT


A number of additional innovations have been made to
the HumeGard® GPT to facilitate their effective operation
in a wider range of applications:

• Super-critical HumeGard® GPT – designed to operate
  under supercritical flow conditions in steep, high
  velocity drainage networks.
• Angled HumeGard® GPT – designed to replace a 45°
  or 90° junction in a drainage network.
• Dual outlet HumeGard® GPT – designed to divert the
  treatment flow to downstream natural Water Sensitive
  Urban Design (WSUD) elements such as wetlands and
  bio-retention whilst bypassing excess flows through a
  second outlet.


• Super-critical HumeGard® GPT
  The super-critical HumeGard® GPT (refer to Figure 2)
  was borne out of the original HumeGard® GPT, with
  modifications to deliver even greater performance
  under super-critical flow conditions. This model
  replaces the floating boom with a broad-crested weir
  that diverts the treatment flows into the treatment
  chamber under super-critical flow (Fr>1) conditions
  without creating hydraulic jumps and adversely
  impacting on performance.

  Flow into the treatment chamber passes through a
  stainless steel screen at a velocity <0.2 m/s and exits
  the device via a slot beneath the broad-crested weir
  (refer to the red arrows in Figure 2). The inserts in
  these models are manufactured from fibreglass for
  increased durability. The stainless steel screen can
  be shaped with a curved profile upon request. When
  the treatment flow rate is exceeded, the excess flow
  bypasses over the broad-crested weir to the outlet. This
  maintains the treatment flow into the chamber but
  protects against scour of captured material.




                                                                                                       HumeGard® GPT   5