3½-year monitoring programme demonstrated that the additive treatment of
fuel oil with additives from “rb bertomeu” acts to double the life of the exhaust valves of Diesel engines.
This extensive monitoring programme was applied to the three engines at the
cogeneration plant at M.S.M.
The exhaust valves of the Deutz engine BV 16M 640 (producing 6.3 MWhe) are assigned an operational life of
9,000 hours by the manufacturers, who stipulate a maximum of 12,000 hours.
The system of procedures at general overhauls on exhaust valves between the
years 1995 and 1999 consisted of removing, rectifying and reinstalling the same valves. Replacements were only made when valves
had blown out, been excessively corroded, suffered thermal fatigue, or when
the valve seating had failed to conform to size due to successive
rectification (the depth of rectification is directly proportional to the
severity of corrosion). This system permitted exhaustive monitoring of
the actual duration of the valves.
The Plant at MSM has used additives
for fuel oil from “rb bertomeu” practically since the plant was brought into operation, and it has
practised this exhaustive monitoring programme that has resulted in
quantifiable data on the relationship between the use of these additives
and the prolongation of the operational life of exhaust valves in the
engines. Throughout the 29,000 hours in operation of each engine, the
anticorrosive action of the additive meant that the rectifications on the
valve seats were highly superficial and that there were practically no
valve blowouts. This resulted in attaining
double the average operational life as estimated by the manufacturer,
reaching 29,000 hours for 70% of the valve cones and for 86% of the valve
baskets of the exhaust valves. In practice, this meant
reducing the cost of replacing exhaust valves by half during this period
(of approximately 3½ years).
For further information on
this subject, consult the following documents compiled by rb bertomeu:
· MSM Co-generation Plant. Valve replacement history-Jun 98
· MSM Co-generation Plant. Historial data on valves
· Reference letter from clients : MSM (01-08-1998)