Cleaner Exhaust from the Engines You Already Run

Nett Technologies designs and makes emission control for diesel, LPG, CNG and petrol engines – catalysts, particulate filters, exhaust diluters and flame traps – so existing machines can keep working cleanly, indoors and underground. Norman G Clark supplies and supports Nett in Australia.

Not sure what you need? Call (03) 9116 9200 and talk it through with our team.

Solutions

What Do You Need to Clean Up?

Your industry

Diesel Exhaust and Soot

Cut carbon monoxide, hydrocarbons and diesel particulate from diesel engines.

Forklifts and Gas Engines

Cut CO, HC and NOx from LPG, CNG and petrol engines – large and small.

Working Underground or Indoors

Cool and dilute exhaust where people work close to it, and stop flames in hazardous areas.

The range

Nett Technologies Products

Diesel exhaust and soot

Diesel Oxidation Catalysts

Catalytic mufflers that cut carbon monoxide, hydrocarbons and particulate from diesel engines.

M-Series metallic · D-Series ceramic

Overview

Diesel exhaust and soot

S-Series Passive DPF

A passive, catalysed DPF for mining and heavy equipment.

MSHA listed · 2,000–6,000 h service

Overview

Forklifts and gas engines

3-Way Catalytic Converters

Catalytic mufflers for LPG, CNG and petrol engines that remove CO, HC and NOx together.

90–99% reductions

Overview

Working underground or indoors

Flame Traps

Flame traps for explosion-protected diesel engines in hazardous areas.

In Australian coal mines since 2007

Overview

How it works

How Nett Emission Control Works

Each technology works on a different part of the exhaust problem.

Catalysts Burn Off the Gases

A diesel oxidation catalyst turns carbon monoxide and hydrocarbons into carbon dioxide and water as the exhaust passes over a coated metal or ceramic honeycomb. On LPG, CNG and petrol engines a 3-way catalyst also removes nitrogen oxides, with an oxygen sensor and air/fuel controller keeping the engine at the right mixture.

Filters Trap the Soot

In a wall-flow particulate filter, every channel is blocked at one end, so exhaust has to pass through the porous walls – the soot can’t. A catalyst coating lets the trapped soot burn away in normal running, when the exhaust is hot enough (about 275–300 °C for a quarter of the time).

Wall-flow filter: channels plugged at alternate ends force the exhaust through the walls. Image: Nett S-Series
Wall-flow filter: channels plugged at alternate ends force the exhaust through the walls. Image: Nett S-Series

Diluters Cool and Spread It

An FD-Series diluter draws in five to ten times as much fresh air as exhaust, cooling it from about 450 °C to 70–80 °C and spreading it further from people.

FD-Series diluter: exhaust flowing along the curved inner surface draws in fresh air. Image: Nett
FD-Series diluter: exhaust flowing along the curved inner surface draws in fresh air. Image: Nett

Why Nett, through Norman G Clark

Proven Emission Control

Verified

Systems verified by the California Air Resources Board (CARB) and the US EPA.

Direct Fit

Catalytic mufflers replace the original muffler – a database of over 10,000 direct-fit designs.

Proven in Australia

Nett flame traps have been used in approved underground coal mine vehicles since 2007.

Local Support

Norman G Clark helps choose, size and fit the right system – call (03) 9116 9200.

Literature

Catalogues and Data Sheets

Brochures

Small Engines

Talk to Us About Your Application

Tell us about the job – the machine, the conditions and what it has to do – and we’ll help you choose the right Nett Technologies product.

Call (03) 9116 9200
Email customerservice@ngclark.com.au