Preventing Fuel Evaporation from Mobile Fuel Tanks
Effective strategies to minimize fuel exposure to air and reduce evaporation
Sealing Systems
High-quality mobile fuel tanks should be equipped with airtight caps or lids featuring durable gaskets made from fuel-resistant materials. These gaskets create a tight seal when the cap is secured, blocking air flow and preventing fuel vapors from escaping. Some advanced caps also include one-way valves that allow pressure to equalize inside the tank without letting fuel vapors leak out.
Minimizing Headspace
Headspace—the empty space above the fuel surface—contains air that interacts with fuel, allowing vapors to form and escape. When filling a mobile fuel tank, it should be filled to an appropriate level to leave minimal empty space. This reduces the volume of air in contact with the fuel, lowering the rate of vaporization.
Material Selection
Tanks made from opaque, heat-resistant materials help block sunlight and reduce heat absorption. Opaque materials prevent UV radiation from penetrating the tank, while heat-resistant options keep fuel temperatures more stable, even in hot outdoor conditions. Some tanks also feature external insulation layers, which further shield the fuel from temperature spikes.
Proper Storage and Transport
When not in use, mobile fuel tanks should be stored in shaded, cool areas rather than direct sunlight. During transport, securing the tank to prevent excessive movement helps maintain the integrity of the seal and avoids accidental opening of the cap. Avoiding prolonged exposure to extreme temperatures also reduces evaporation risk.
Using Fuel Stabilizers
Using fuel stabilizers can indirectly help reduce evaporation-related issues. While stabilizers primarily prevent fuel degradation, they can also slightly reduce vapor pressure in some fuel types, making vapors less likely to escape through small seal gaps. However, stabilizers should be used alongside, not in place of, proper sealing and storage practices.