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M0087475-06
The document series ISO standard 22241 will give
information on quality requirements, test methods,
handling, transportation, storage, and refilling
interface.
Spillage
Care should be taken when dispensing DEF. Spills
should be cleaned immediately. All surfaces should
be wiped clean and rinsed with water.
DEF that has been split will crystallize when the
water within the liquid evaporates. Spilt DEF will
attack paint and metal. If DEF is split, wash the area
with water.
Caution should be used when dispensing DEF near
an engine that has recently been running. Spilling
DEF onto hot components may cause the release of
ammonia vapors. Do not breathe ammonia vapors.
Do not clean up any spills with bleach.
Filling the DEF Tank
The fill cap on the DEF tank must be colored blue.
The DEF level is important, allowing the DEF tank to
run dry or operate at a low level can affect the engine
operation. Because of the corrosive nature of DEF,
the correct materials must be used when filling a DEF
tank.
DEF Quality
The quality of DEF can be measured by using a
refractometer. The DEF must comply with ISO
standard 22241-1 with the urea solution of 32.5
percent. Perkins offer a T40-0195 Refractometer
for checking the concentration of the DEF.
Cleanliness
Contaminants can degrade the quality and life of
DEF. Filtering DEF is recommended when dispensed
into the DEF tank. Filters should be compatible with
DEF and should be used exclusively with DEF.
Check with the filter supplier to confirm compatibility
with DEF before using. Mesh-type filters using
compatible metals, such as stainless steel, are
recommended. Paper (cellulose) media and some
synthetic filter media are not recommended because
of degradation during use.
Care should be taken when dispensing DEF. Spills
should be cleaned immediately. Machine or engine
surfaces should be wiped clean and rinsed with
water. Caution should be used when dispensing DEF
near an engine that has recently been running.
Spilling DEF onto hot components will cause harmful
vapors.
Storage
Do not store DEF in direct sunlight.
Follow all local regulations covering bulk storage
tanks. Follow proper tank construction guidelines.
Tank volume typically should be 110% of planned
capacity. Appropriately vent indoor tanks. Plan for
control of overflow of the tank. Heat tanks that
dispense DEF in cold climates.
Bulk tank breathers should be fitted with filtration to
keep airborne debris from entering the tank.
Desiccant breathers should not be used because
water will be absorbed, which potentially can alter
DEF concentration.
Table 5
Storage Temperature
Below 25° C (77° F)
25° C (77° F) to 30° C (86° F)
30° C (86° F) to 35° C (95° F)
Above 35° C (95° F)
Perkins recommend that all DEF taken from storage
should be checked to ensure the DEF meets ISO
standard 22241-1.
Refer to "ISO 22241" document series for more
information about DEF quality control.
Note: Dispose of all fluids according to applicable
regulations and mandates.
Handling
Follow all local regulations covering transport and
handling. DEF transport temperature is
recommended to be −5° C (23° F) to 25° C (77° F).
All transfer equipment and intermediate containers
should be used exclusively for DEF. Containers
should not be reused for any other fluids. Ensure that
transfer equipment is made from DEF-compatible
materials. Recommended material for hoses and
other non-metallic transfer equipment includes:
• Nitrile Rubber (NBR)
• Fluoroelastomer (FKM)
• Ethylene Propylene Diene Monomer (EPDM)
The condition of hoses and other nonmetallics that
are used with DEF should be monitored for signs of
degradation. DEF leaks are easily recognizable by
white urea crystals that accumulate at the site of the
leak. Solid urea can be corrosive to galvanized or
unalloyed steel, aluminum, copper, and brass. Leaks
should be repaired immediately to avoid damage to
surrounding hardware.
Materials compatibility
DEF is corrosive. Due to the corrosion caused, DEF
must be stored in tanks constructed of approved
materials. Recommended storage materials:
Stainless Steels:
71
Maintenance Section
Diesel Exhaust Fluid (DEF)
Expected DEF Life
18 months
12 months
6 months
test quality before use
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