Alfa Laval LeviMag, Инструкция по эксплуатации, Страница: 23 / 68

5 Maintenance
It is important that the drive unit is dismounted before removing the impeller.
The maintenance interval for the mixer depends on the application - shorter or longer service interval may appear.
Handle the mixer with care and follow the recommended inspection to prevent unnecessary damage.
5.2 Inspection
After 25 hours of operation, listen for abnormal sounds. If any, dismount the mixer and check all parts for scratches and dents.
CAUTION
ATEX zone must only be present after the 25 hours run-in period. For ATEX all parts must be checked for scratches and
dents after the 25 hours run-in.
Alfa Laval recommend that the bearings and O-rings should be checked for cleanability and wear after one month of operation.
If there is abnormal wear on either component, contact Alfa Laval for further instructions.
After each CIP sequence, check that the mixer and parts are clean - also look for wear, check the gaskets ensuring that
it is without tear or cracks.
Regular inspections should be performed at least every 6
th
months or as according to local Preventative Maintenance plans.
If any component is found damaged during inspection, please contact Alfa Laval for repair and/or replacement parts.
All wear parts or damaged parts should be replaced only with genuine Alfa Laval components.
Beware of special maintenance interval for ATEX option see section 7.7 Additional maintenance for ATEX.
Possible damages on the parts are listed below:
No Component Check zone Description Control method Action
1 Impeller Surfaces and edges - scratches, foreign particles
- tolerance on bearing surface
- visual
- measuring
- cleaning
- change bearing
2 Female bearing
Surfaces and edges
- scratches - visual - change bearing
Thread - tolerance on surface
- damage on thread
- measuring
3 Male bearing Surfaces and edges - scratches - visual - change bearing
Thread - tolerance on surface
- damage on thread
- measuring
4 O-rings Surface - deformed
- cracks
- visual - change O-rings
5 Weld Plate Surfaces and edges - damage on thread - visual - re-thread, if possible
Thread - damage on outer OD - measuring - re-polish, if possible
6 Drive Unit Drive Rotor - foreign particles on parts - visual - cleaning
Gear motor - leaks or noises - audible - change gear motor
Motor - cable failure - repair gear motor
7 Drive Rotor Run-out - out of balance - measuring - align so run-out is
maximum 0.2 mm,
see section 8.11
Measuring of total
run-out
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