Mavel Kaplan BULB Turbine
Technical Specification
2.2 Cavitation
MAVEL guarantees that the weight of the lost material caused solely by cavitation during the warranty
period for cavitation specified below will not be greater than the value defined by the IEC code —
60609/2004, provided however, that the turbine operates within the operating range (zone) determined
in the operating instructions provided by MAVEL. The warranty for cavitation is provided for the period
of 8000 hours of effective operation, but not longer than two (2) years from the date of the startup of
the turbine.
If not otherwise specified in the Contract, the turbine must not be operated (i) longer than 500
operation hours per year (in aggregate) at working points below 60% of the load (between 0% and 60%
of output) at minimum and nominal net head; (ii) at working points below minimum discharge at
maximum net head; (iii) if the position of the centerline of the runner in relation to the tail water level
does not observe (meet) the values stipulated by MAVEL; (iv) if during operation rumbling, detonation
or excessive noises occur in the draft tube.
Any damage caused directly or indirectly by aggressive chemical substances, galvanic or electrolytic
reaction or caused by bacteriological aggression, erosion or damages caused by solid particles in
suspension in the water are expressly excluded from the warranty.
Slight marks and/or normal wearing and/or corrosion shall not be considered defects.
2.3 Vibration
Vibration is evaluated in compliance with ISO 10816 and the vibration level should be zone B (the
machines with vibrations within this zone are normally considered as acceptable for unlimited long time
operation).
3 QUALITY CONTROL
All parts manufactured by MAVEL will be inspected according to internal inspection and testing
programs. The standard manufacturing program includes certificates of chemical analysis, material
tests, testing of non-destructive parts such as castings and welds, visual and dimensional inspection,
static and dynamic balancing of all rotating parts and leakage and pressure tests of all parts exposed to
fluid pressure.
4 COMMISSIONING PROCEDURE
The commissioning procedure consists of the following:
e Tests without water
e Tests with water (wet tests)
e Tests without turbine loading
e Tests with unit loading
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