Fuel-Treatment Systems / Filter Water Separators
February 3, 2011 No CommentsFuel-Treatment Systems / Filter-Water-Separators of Mahle NFV
Diesel fuel oils
Dieseloils, e.g. medium distillates like HEL, MDO, MGO, F75 / F76, F54 etc., are industrial manufactured products with specific defaults but enormous differences.
Especially the way from the refinery to the road tanker, bulkcarrier or pipelines in the tank reservoirs and from there through further carriers to the end-user is causing unintended and not calculable changement of the fluids.
Contaminations
The contaminations caused by the previously mentioned ways are:
Solids:
- particles of rust in different sizes
- dust and sand
- sediments of the products
Water, leading to:
- micro organisms
An effective fuel-treatment means suitable filtration with simultaneous water-separation.
SOLID
Filtrationtest with a contaminated fueloil MGO, stored in an aluminium tank.
In the range of 1,2 µm only parts of oxydations remain.
WATER/MICRO ORGANISMS
Reason for contamination with water:
Normally water in diesel fuel oils occures out of:
Diesel fuel oil with a temperature of 20°C is already binding 70 ppm water, without causing a dull. Technical delivery conditions permit even a much higher water – content.
Max. permissible water-contents under technical delivery-conditions:
Removing water out of medium-distillates down to a minimum possible rate has the following reasons:
the limit for micro organisms growing is up to
ca. 50 – 60 ppm non-solved water
In this tank(Al Mg Si 4,5) the silicons served as trace minerals and hence as fertile soil for micro organisms.
A black slimy „placenta“ with a particle-size of approx. 1µm grew.
The solution is: Fuel-Treatment with a MAHLE NFV – Dewatering System
Development of the filter- coalescer- elements
The classic Coalescer initially had been developed for the whole aviation-range, i.e. normally for a clean and low-viscosity product of low density.
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