IPU Group were recently called in to check out the storage tanks supplying diesel to a bank of generator sets maintained by Puma Generator Service Ltd. The generators are supplying vital back up power to the data centre of a leading law firm in the City of London. The Puma engineers were concerned about the quality and cleanliness of the diesel fuel in the storage tanks and the potential for premature engine filter blockage and fuel system wear.
Each fuel tank was sampled and the fuel subjected to a full suite of tests by IPU. Thankfully the fuel was found to be free of water and ‘diesel bug’ but there was a concern over the high levels of particle contamination were found.
The proposed solution was fitment of a DD28 fuel polishing unit with inbuilt particle counter. The fuel polishing unit is now set, via an inbuilt timer, to run on a daily cycle. Fuel is drawn from the tank and through a multi-stage filtration process which removes particle contamination and water, before being returned to the tank. The integral particle counter takes cleanliness reading of the fuel every 10 minutes, storing the data in its inbuilt memory ready to be downloaded by the visiting Puma service engineer.
As a result of this installation, ISO cleanliness levels have been reduced from a wildly out of spec 24/24/19 to well below the EN590 standard for diesel fuel 18/16/13.