DEF Delivery in Florida — Diesel Exhaust Fluid Supply
DEF (Diesel Exhaust Fluid) delivery across Florida — bulk totes, drums, and tanker supply for fleets and job sites. ISO 22241-compliant, API-certified formula for all SCR-equipped diesel engines.
What Is DEF?
Diesel Exhaust Fluid (DEF) is a precisely formulated solution of 32.5% high-purity automotive-grade urea and 67.5% deionized water. DEF is injected into the exhaust stream of diesel engines equipped with Selective Catalytic Reduction (SCR) systems to convert harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor.
DEF works through a process called Selective Catalytic Reduction (SCR). The fluid is injected into the hot exhaust stream, where the urea decomposes into ammonia (NH3) and carbon dioxide (CO2). The ammonia then reacts with nitrogen oxides (NOx) on a catalyst surface, converting them into harmless nitrogen gas (N2) and water vapor (H2O).
The 32.5% urea concentration is not arbitrary — it is the eutectic point of the urea-water solution, meaning it has the lowest possible freezing point (12°F / -11°C) for any urea-water mixture. This precise formulation is critical: using a different concentration will not freeze correctly, may damage SCR components, and will not meet ISO 22241 specifications.
DEF purity requirements are stringent. Even trace contamination from metals, dust, or non-deionized water can poison the SCR catalyst, leading to expensive repairs. This is why DEF must be stored and handled using only dedicated HDPE (high-density polyethylene) containers, hoses, and pumps — never metal containers, which can introduce catalytic poisons.
The EPA requires that SCR-equipped engines enter a reduced-power mode (deration) when DEF is depleted. For on-road trucks, this typically limits speed to 5 mph — effectively immobilizing the vehicle until DEF is replenished. For construction equipment, power output is reduced to a fraction of rated capacity. Maintaining adequate DEF supply is as critical as maintaining diesel fuel supply for any fleet or job site.
Common Uses for DEF
Over-the-Road Trucking
All Class 8 trucks manufactured after 2010 use SCR systems requiring DEF. A typical truck uses 2-3 gallons of DEF per 100 miles driven.
Construction Equipment
Tier 4 Final construction equipment — excavators, dozers, loaders, cranes — requires DEF for emissions compliance. Running out of DEF triggers engine power deration.
Learn more →Fleet Vehicles
Diesel delivery vans, service trucks, and medium-duty fleet vehicles with SCR systems require regular DEF replenishment alongside diesel fueling.
Agricultural Equipment
Modern Tier 4 tractors, combines, and farm equipment require DEF. Bulk DEF delivery to farms eliminates trips to town for supplies.
Learn more →Generators & Stationary Engines
Tier 4 Final stationary diesel generators and industrial engines use SCR systems that consume DEF during operation.
DEF Technical Specifications
| Property | Value |
|---|---|
| Composition | 32.5% urea + 67.5% deionized water |
| ISO Standard | ISO 22241 (all parts) |
| API Certification | American Petroleum Institute certified |
| Freezing Point | 12°F (-11°C) |
| Shelf Life | 12 months at 77°F (25°C) |
| Storage Temperature | 12°F to 86°F (-11°C to 30°C) |
| Specific Gravity | 1.0872-1.0932 at 68°F |
| Color | Clear, colorless to slightly amber |
How BettyJet Delivers DEF
Delivery Method
Available in multiple formats: 275-gallon IBC totes, 330-gallon totes, 55-gallon drums, and bulk tanker delivery for high-volume users. Totes and drums can be delivered on flatbed trucks.
Minimum Order
1 tote (275 gallons) or 4 drums (220 gallons total)
Storage Notes
Store DEF out of direct sunlight in a temperature range of 12°F to 86°F. DEF freezes at 12°F (-11°C) but returns to full effectiveness when thawed — freezing does not degrade the product. Avoid contamination: use only dedicated DEF-rated containers, pumps, and hoses. Do not store in metal containers (use HDPE). Shelf life is approximately 12 months at 77°F; shorter in higher temperatures.
DEF Frequently Asked Questions
What is DEF and why do diesel engines need it?
DEF (Diesel Exhaust Fluid) is a 32.5% urea and 67.5% deionized water solution injected into the exhaust of SCR-equipped diesel engines. It converts harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor. Since 2010, EPA Tier 4 and on-road emissions standards have required SCR systems on most new diesel engines, making DEF essential for compliance.
What happens if a diesel engine runs out of DEF?
When DEF runs low, the engine computer triggers a series of warnings. If DEF is depleted completely, EPA regulations require the engine to enter a reduced-power mode (deration), typically limiting speed to 5 mph. The engine will not shut off, but it becomes effectively unusable until DEF is replenished. This applies to both on-road trucks and off-road equipment.
How much DEF does a diesel truck use?
DEF consumption is typically 2-3% of diesel fuel consumption. A Class 8 truck averaging 6 mpg will use approximately 2-3 gallons of DEF per 100 miles. A truck with a 100-gallon diesel tank might use 2-3 gallons of DEF per fill-up. Annual consumption for a long-haul truck is roughly 1,000-1,500 gallons.
Can DEF freeze and does freezing damage it?
Yes, DEF freezes at 12°F (-11°C). However, freezing does not damage or degrade DEF. When thawed, it returns to full specification and effectiveness. In Florida, DEF freezing is rarely a concern, but heated storage or dispensing systems are available for operations in colder regions.
Does BettyJet deliver DEF in bulk across Florida?
Yes. BettyJet delivers DEF statewide in 275-gallon totes, 330-gallon totes, 55-gallon drums, and bulk tanker loads. We provide ISO 22241-certified, API-approved DEF with documentation. Call (813) 694-8898 for pricing and delivery scheduling.
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