Hydrodynamic Separators, GPTs and Inserts

Vortechs™

Hydrodynamic Separator for Shallow Applications

Enquire Now

Download Brochure

Vortechs™ is a below-ground, engineered stormwater treatment device that combines swirl concentration and flow controls into a single treatment unit.

The design also allows for easy inspection and unobstructed maintenance access. With comprehensive lab and field testing, the system delivers proven results and site-specific solutions.

Pre-cast models can treat peak design flows up to 700 L/s; cast-in-place models handle even greater flows. A typical system is sized to provide an 80% load reduction based on field and laboratory-verified removal efficiencies for varying particle size distributions such as 50-micron sediment particles.

The Vortechs™ system’s swirl concentrator and flow controls work together to create a low energy environment, ideal for capturing and storing fine particles and other pollutants of concern.

Auckland

Christchurch

All regional councils

Stormwater360 Online Maintenance Training is live What is a Life Cycle Cost Analysis?

80%

removal

of particles down to 50 micron

metre

typical depth below pipe invert

700L/s

treats

peak design flows up to 700 L/s

Easy

maintenance

and cost-effective installation

Vortechs™

Start project Close Get Started

Or call us on 0800 STORMWATER

How it works

01 Enters

Untreated stormwater enters the Vortechs swirl chamber through an inlet pipe.

02 Separation

The swirling motion of the water within the chamber promotes gravitational separation of solids which settle on the chamber floor.

03 Exits

> Stormwater exits the swirl chamber, where a baffle wall traps floatables and hydrocarbons.
> Stormwater flows under the baffle wall into the flow control chamber which contains separate flow controls for peaks and low-intensity flows
that are designed specific to project requirements.
> Treated stormwater flows to the outlet chamber and exits via the outlet pipe.

04 Video overview

Let's meet

for a Lunch & Learn

We will bring lunch to your office and give a presentation to you and your colleagues on Vortechs™

Let's meet for a lunch and learn

Our latest projects. A proven track record of success.

Talk to an expert

St Mary's Bay - Masefield Water Quality Improvement Project

Drawings and Resources

Browse the library

Download drawings, brochures, install manuals and technical documentation.

Vortechs™ Product Sheet

Download

Vortechs™ Operation and Maintenance Guidelines - DRAFT (for site-specific guidelines email [email protected])

Download

Stormwater360 Product Brochure

Download

Common Questions

View all FAQs

Still have questions?
We are here to help.

Talk to an expert

How does the Vortechs™ work?

The Vortechs™ system is a high-performance gross pollutant trap that effectively removes fine sediment, oil and grease and floating and sinking debris. The device combines swirl concentration and flow controls into a single treatment device, working together to minimise turbulence and provide stable storage of captured pollutants.

The treatment process begins with stormwater runoff entering into the swirl chamber. The hydrodynamic swirling of water within this chamber promotes the gravitational separation of sediment. This sediment settles and accumulates on the floor of the device within the storage zone. 

A baffle wall traps hydrocarbons and floating debris whilst the treated water discharges underneath.

A set of flow controls (a low flow orifice and a high flow weir) regulate the flows in the device to ensure the swirl operates in high-intensity storms, reduce the inflow velocity, and prevent re-suspension of collected contaminants.

Check out the summary video HERE for more information.

View all Products