(Translated from original letter)
MSM , MINERA SANTA MARTA , S.A. E09250 BELORADO – Burgos – (Spain)
Belorado,
1st August 1998
Dear
Sir,
In reply to your request, having reached 25,000 - 26,000 operation
hours of 3 Deutz engines installed in our Cogeneration Plant in Belorado, we
are pleased to express the satisfaction in our factory with the benefits
obtained by the use of your rb bertomeu additive, which we have been adding
to the fuel oil (nº 1 Bia and nº 1) for exactly 3 years (August/95 - August/98).
In addition to the already detected improvements regarding the
reduction of fuel oil sludge, we would like to emphasise the following
achievements observed and quantified during this period, regarding the
conservation of the engine valves:
- Total absence of corrosion in the inlet valves of the 3 engines, none of them
having been replaced for this reason (only 3 have been changed because
of mechanical misadjustment, which
represents 3.1 % of the total installed)
- Almost complete
elimination of corrosion in the exhaust valves of the 3 engines, only 4
valves have been replaced for this reason (4.2 % of the total valves
installed)
- Notable total increase of the useful life of the exhaust valves, which
practically doubles the value estimated by the manufacturer. Currently, 60%
of the valves and 84% of the original valve baskets are in service, the
remainder having been replaced gradually due to thermal fatigue or by not
reaching the necessary minimum measures, as of approximately 20,000-21,000
operation hours.
Also, we would also like to express our satisfaction with the
Technical Service that offer, especially referring to the inspections of the
engines, whose technical and photographic reports constitute a valuable
element for the follow-up and statistical control of the evolution
of the maintenance of our engines.
We authorise the use of this letter for reference purposes.