DEF bulk transfer pumps- common mistakes.

DEF bulk transfer pumps- truck belly boxesOk, so we all have leaned a thing or two about DEF bulk transfer pumps during the past couple of years.  Folks were right in the middle of the learning curve from the equipment side to the fluid side, handling it and what to do but especially, what not to do!

Here at TECALEMIT Inc., we pride ourselves in sharing valuable information with our customers and friends… hoping to help avoid mistakes.  If we know something that would be valuable to you all…. then we will definitely dive into it here, so keep a close eye on our platforms and don’t forget to follow and subscribe.

Back on topic…DEF bulk transfer pumps for truck belly boxes is something that we do in addition to what you may know us for.  This is more of a specialty line and something that we are constantly innovating to have more customization options. Some of these truck ‘belly’ boxes are geared towards the handling and transfer of Diesel Exhaust Fluid (DEF), fuel, lubricants, chemicals, and a few more mediums.


Diesel Exhaust fluid (DEF) contaminationFocusing on DEF bulk transfer pumps for Diesel Exhaust Fluid,  we all know that part III of the ISO 22241 standard discusses best practices for the handling, shipping, and storing Diesel Exhaust Fluid (DEF). Here at TECALEMIT, we keep this very front and center as we go about designing our DEF bulk transfer pumps.  So, this is exactly what we needed to highlight, it is imperative to understand the material compatibility when delivering bulk diesel exhaust fluid (DEF).

Here is an example of what happens when introducing a material like aluminum and cast iron in the delivery line.  Clearly, DEF being corrosive; the picture tells the rest of the story.  This discharge valve system was retrofitted on this bulk delivery truck containing aluminum and cast iron components, a negative when handling DEF. You see how DEF will start eating up the material and allowing those iron and aluminum particles to get suspended in the liquid. The color change of the fluid is a tale tell sign that foreign particles are in the fluid and it is those exact metal particles that will travel into your SCR system which in turn could shut down the engine.  




TECALEMIT best practices for our bulk DEF transfer systems – Truck Belly boxes.

Today, we still hear many stories where this continues to be an issue.  As you saw, DEF can be contaminated when it comes into direct contact with certain materials and is corrosive with others.  As such, the ISO 22241 standard states metals and plastics that are compatible.  TECALEMIT bulk DEF transfer pump systems use stainless steel and EPDM rubber which resist corrosion and prevent contamination according to the ISO 22241 standard.

Keep in mind that a lot of our truck boxes are used for fuel, lubes, and chemicals.  In the case of DEF, we follow the standard for materials and we use a very strict procedure on testing the systems.  The truck belly boxes are always tested using DEF, this allows us to calibrate the meter(s) and also dial in gallons per minute output.  Once the systems are tested, the lines are flushed using DI water.  This is where our QC takes a final look and you receive your system ready for operation.

In summary, this article “DEF bulk transfer pumps- common mistakes” was geared towards opening up the dialogue of continuing education on the Diesel Exhaust Fluid front.  Keep talking to your customers and present information on what the risks are for taking short cuts.  After all….what good is information if we don’t share it.


Have a great rest of the week!


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