Beware of Backflush Filter Failures – A Cause of Engine Damage

Automatic backflush filters are designed to protect engines by keeping fuel and lubricating oil clean. However, Gard’s recent claims experience shows that when these filters fail, they can become a serious source of engine damage, with potentially costly and time-consuming consequences.

Automatic backflush filters for fuel and lubricating oil cleaning have been in operation for many years and have become common in many engine installations. The filters generally consist of one or more chambers with a set of candles of fine wire mesh that the oil flows through. Larger particles get stuck on the surface while smaller particles flow through the filters and back into circulation.

The difference compared to traditional filtration is the backflush sequence, which is normally pressure triggered, dependent on make and type of your installation. When the differential pressure reaches a set value the filter compartment closes and the oil flow stops. Simultaneously, a new chamber opens to allow continuous filtration and engine operation. Air is then forced through the closed chamber, rinsing the candles before the chamber is then refilled with clean oil and set in standby for further operation

Published by Gard.

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