18.02 How often is filtration needed?

Filtration frequency for fuel systems can range from continuous to annual. There are a couple of characteristics of new generator systems that are driving the need for more frequent filtration. The first is that new engines designed to minimize emissions are more sensitive to particulates in the diesel fuel. The second is that biological issues are likely to increase as bio-diesel components are added in part to standard diesel fuel supplies.

A minimum filtration schedule would be (a) annual fuel testing and biocide treatment, with (b) annual filtration of tank volume with a portable pump – filter unit.

A maximum filtration schedule would be using a continuously running pump-filter system for the tank, with monthly fuel testing and biocide treatment as needed. This method of filtration polishing has the benefit of minimizing the controls associated with fuel pump cycling.

Commonly tank filter systems are setup on an ON-OFF cycle to provide a full filtration of the tank contents weekly, bi-weekly, or monthly.