Sotera DEF - Manual (Page 3)

3
Safety Information
About Diesel Exhaust Fluid (DEF)
The Fill-Rite DEF pump is designed to pump AUS32 (Aqueous Urea Solution 32.5%), better
known as Diesel Exhaust Fluid, or “DEF”.
AUS32 is used by modern diesel engines which are equipped with an SCR (Selective
Catalytic Reduction) system. DEF never comes into contact with the fuel; the common
misconception is that it is an additive. DEF is carried onboard the vehicle in its own storage
tank. It is injected into the exhaust gases as a post combustion process through an SCR
where it breaks harmful NOx (Nitrous Oxide) emissions down into mostly Nitrogen and
Oxygen.
Because the specific purity of the AUS32 solution is critical to the catalytic reaction, the Fill-
Rite DEF pump is designed to maintain the integrity by using components made of materials
that will not taint or alter the solutions chemical structure.
WARNING! This pump is not for use with fluids that have a flash point below
100°F (37.8°C, ie: gasoline, alcohol). Refer to NFPA 325M (Fire Hazard
Properties of Flammable Liquids, Gases, and Volitile Solids) for flash points of
common liquids. Static electricity buildup and discharge could result in arc and
explosion.
WARNING! DO NOT use the pump with fluids intended for human consumption.
WARNING! To insure safe and proper operation of your equipment, it is critical to
read and adhere to all of the following safety warnings and precautions. Improper
installation or use of this product can cause serious bodily injury or death!
1) Maintaining the purity of AUS32 (Aqueous Urea Solution 32.5%) is critical;
as such, it is imperative once the system is assembled, it must remain
sealed to insure the integrity of the fluid. Breaking the seal on the system
can lead to fluid contamination.
2) After dispensing DEF be certain to drain all the fluid from the nozzle, making
sure it is pointing downward when stored in the nozzle boot. DEF remaining
in the nozzle tip and exposed to air will crystallize and can plug the nozzle.
3) DO NOT lay the dispensing nozzle on the ground or any surface that may
contaminate the nozzle tip as this can compromise the purity of the DEF.
4) Inlet and outlet threads are BSPP style and require no special sealant.
5) Storage tanks should be securely anchored to prevent shifting or tipping
when full or empty.
6) The pump motor is equipped with thermal overload protection; if overheated,
the motor will shut off to prevent damage to the windings. If this happens,
TURN THE PUMP OFF! When the motor cools, it will restart without
warning if the power is on.
IMPORTANT! After initial assembly and installation, flush the entire dispensing
system by pumping 5 – 10 gallons of DEF through it. This purges the system of
air, and insures any impurities that may have been in the system are washed out.
Dispose of the DEF used to flush the system using approved DEF handling
procedures; do not return the fluid to the drum or tote, or use it in a vehicle.