Stormbrake Vortex Flow Control

The BMS Stormbrake is a vortex flow control device devised for flow rates ranging from 0.8 l/s to 80 l/s It is manufactured from acid resistant stainless steel (Ref 1.4404/316L) is extremely easy to install or retro-fit and is suitable for a variety of applications such as stormwater management and as part of SuDS.


It is activated when the hydraulic head up-stream increases, hereby causing trapped air within the vortex to restrict flow to the outer orifice. It has no moving parts and requires no external energy requirement.The continuous high-throughput opening provides a secure flow control whilst reducing the danger of blockage, to a minimum.

The BMS Stormbrake is simple to install and can be used for both new & existing applications. It is fitted with an extendable handle, which ensures that it is removable from ground level for maintenance purposes. It can easily be adapted to suit any size or shape of manhole.

Typical Applications

  • Stormwater Management
  • Source Control
  • New & Existing Developments
  • Storage Facilities
  • Sewage and Water Treatment Plants
  • Flow Balancing
  • Land Drainage


  • Adjustable inlet & outlet orifice plates
  • Simple installation
  • Manual-Bypass
  • Self activating and self cleaning
  • No moving parts
  • No Power Requirements
  • Removable for maintenance

Technical Data

SFC 325-90 0.8-8.3l/s 110mm 1200-1500-1800mm & rectangular manhole
SFC 425-150 3.8-21.4l/s 160mm 1200-1500-1800mm & rectangular manhole

Stormbrake Flow Control (SFC)

A. 325-90 (left) B. 425-150 (right)

Stormbrake Flow DiagramStormbrake Flow Diagram

Application Chart & Diagram

All dimensions in mm

SFC TYPE 325 425
DN 90 150
MM VS MIN 230 300
BMIN 265 315
A 325 425
B 163 213
C 265 325
D 170 200

Stormbrake Installation DiagramStormbrake Flow DiagramStormbrake Flow Diagram