Fuel Filtering and Polishing

Fuel Filtering and Polishing

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CommTank has been offering fuel filtering and polishing services as an alternative to tank cleaning since 2008. Mission critical facilities prefer our service because it requires no down time. The fuel system remains online during the fuel filtration.  Our polishing service provides a clean tank containing fuel that performs like new.

The cost of diesel fuel, although expensive, is small when compared to the cost of repair for problems that may develop without the proper maintenance of fuel storage systems. Fuel filtering and polishing is an effective method for maintaining fuel that meets the ASTM D975-10 specification for fuel quality.

Why filter and polish your fuel?

If your diesel filter is clogging frequently and causing generator shutdowns during weekly testing, the fuel may look like this diesel sample taken from an emergency generator.

Before and after samples of diesel fuel that's been polished

Diesel fuel samples before polishing and after polishing

Many fuel suppliers recommend that diesel fuel stored for emergency use should be replaced with new fuel if not used within a year. Disposing of old fuel, cleaning the tank, and purchasing new fuel is an expensive process when working with large aboveground and underground storage tanks. As an alternative, CommTank recommends testing your fuel to measure it against ASTM standards as specified by the original supplier. If fuel testing determines that the fuel is contaminated, we provide a fuel polishing service that removes the microorganisms and the water that supported the growth. Once the fuel has been filtered and polished, we re-test the fuel to verify that it meets ASTM specifications.

CommTank's diesel fuel polishing system

How We Filter Fuel Storage Tanks

CommTank's fuel filtration system contains 3 stages. The first stage utilizes a strainer with 1/16th inch mesh that removes large particles. A 25-micron bag filter acts as the second stage of filtration in our system. Bag filters are meant to be thrown away when they clog and it’s not uncommon for 3 bag filters to become spent when polishing dirty fuel. The third stage of filtration utilizes 5-micron filters and water separation filters.  Filtering particles smaller than 5 microns will affect the Cetane value of the fuel and manufacturers do not recommended going below this filtration level.  Additionally, we add an algaecide to prevent regrowth of harmful microbes and algae, and ensure it circulates through the entire tank volume. A typical polishing service includes processing three times the volume of each tank.

For examples of our work please see the fuel polishing projects section of our web site.

Call us if you’d like more information on our fuel filtration and polishing services: 1-800-628-8260