from original letter)
MADRID , S.A.
– Madrid – (Spain)
the company responsible for the management of the operation and
maintenance of the Ufefys cogeneration plant at Aranjez (Madrid), we are
pleased to inform you that during the last overhaul of the DEUTZ 6.3Mwe
engines, carried out at 10,496 hours in engine nº1 and 9,946 hours in
engine nº2, we have observed the good condition of the inlet and
exhaust valves, despite having increased the scheduled time between
overhauls (TBO) by 47% and 25.6% respectively.
operation data and the satisfactory results obtained are the following:
- Fuel used:
fuel oil nº1, with normal quality characteristics.
- Additive used:
rb bertomeu beco F1/ASF (as used before)
- TBO schedule:
- Valve condition after normal
No corrosion in exhaust valves or valves bodies
No corrosion in inlet valves
- TBO of last working period:
Engine nº1: 4,406 hours (47% above normal TBO)
Engine nº2: 3,768 hours (25.6% above normal TBO)
- Condition of exhaust valves
and valves bodies after this period:
No corrosion in 63 of the 64 valves and valve bodies in both
Slight corrosion in 1 valve
- Condition of inlet valves
after this period:
No corrosion in any valve
- Average residues accumulated
on exhaust valves:
authorise the use of this letter for reference purposes.