Hunter Ultrasonics

Ultrasonic Cleaning Technology Experts!


1 - Complete Diesel Exhaust Cleaning Systems


  • DPF - Diesel Particulate Filter - Cleaning Explained

Diesel engines (well, all engines really) emit pollutants into the air we breathe.  And by “pollutants” we mean chemicals and compounds that wouldn’t otherwise end up in our air in the quantity and concentration we create with our vehicles.  To reduce the amount of these pollutants in our air, 2007-and-newer diesel engines have been fitted with a filter in the exhaust pipe to capture soot particles.  This matrix of materials (a composite of cordierite, silicon carbide, or metal fibers), called a diesel particulate filter (DPF), traps the particulates (soot) flowing out the exhaust pipe.

All DPFs capture soot until they fill up and create too much backpressure.

Every DPF technology currently available utilizes what’s called a wall-flow filter that’s positioned in the exhaust system.  As the exhaust gases pass through this filter, emissions of particulate matter (PM), carbon monoxide (CO), and hydrocarbons (HC) are trapped in the filter and reduced by more than 90 percent.  This trapped diesel particulate matter (DPM) settles inside the filter walls until temperatures reach levels that allow for DPM combustion.  The process of combusting these trapped particulates inside the filter without an intolerable buildup of engine backpressure is called filter regeneration.  People who think of this as a self-cleaning (we did) for the DPF are practicing a little wishful thinking.  To truly clean the DPF involves taking the filter out of the exhaust system and putting it in a special cleaning chamber and use Ultrasonics to thoroughly clean your filter.

  • EGR - Exhaust Gas Regeneration - Cooler Cleaning Explained

Warning Sign 1 - The unexplained loss of coolant from your degas (overflow) bottle or cooling system.  This can easily be explained when you have a bad EGR cooler - the EGR cooler is simply leaking the coolant back into the exhaust system, not outside of the engine.  Most people make an expensive mistake of ignoring this warning sign.  They assume that since they can not find or see the leak, it must not actually be a leak.  The longer they ignore it, the more coolant that leaks out of the engine and quickly creates Warning Sign #2.

Warning Sign 2 - All that white smoke coming out of the tailpipe is actually steam.  As the coolant is dumped into the exhaust system, it quickly vaporizes and turns from liquid to steam and comes out of the exhaust.

Warning Sign 2 - That overflow of coolant out of your degas bottle is actually not a sign, necessarily, of a bad EGR cooler.  Its more likely a sign that your engine oil cooler is plugged and is restricting the flow of coolant getting to your EGR cooler.  The EGR cooler is not getting enough coolant flowing through, so the coolant that is inside it quickly begins to boil.  When the coolant boils, it creates high-pressure steam pockets which billow out through your degas bottle, pushing and forcing coolant out of the lid.  The EGR cooler should be replaced in this instance because its already been overheated and stressed - and very likely to fail in the near future.


On Road Applications

  • Commercial Trucks,
  • Pickup Trucks,
  • Sprinter Vans,
  • Light Delivery Vehicles,
  • Cars


Non/Off Road Applications

  • Construction Equipment,
  • Mining Equipment,
  • Farm Equipment,
  • Forklifts,
  • Stationary Generators
  • Industrial Process Equipment

2 - "Extractor" Filter Drying Machines

A patent pending machine with the ability to extract loose foulant, dry wet filters and measure backflow pressures all in one PLC controlled piece of equipment.  With a small footprint this unit is what you need to complete your DPF cleaning system or as a stand alone unit for cleaning loose material from filters.


3 - Custom Built Ultrasonic Tanks

Let us help you design and build a tank for your specific cleaning needs.