Mody-pumps G 556 T Manuel d'utilisateur télécharger pdf (Page 7)

GALVANIC CORROSION PROTECTION (FOR SEA-WATER DUTY PUMPS ONLY)

THE PARTS OF THE "MODY" SUBMERSIBLE PUMP THAT ARE IN CONTACT WITH SEA- WATER

ARE PRIMARILY OF STAINLESS STEEL AND ALUMINUM. AS SEAWATER IS AN ELECTROLYTE

THE PROBLEM OF GALVANIC CORROSION EXISTS DUE TO THE DIFFERENT ELECTRIC

POTENTIALS OF THE MATERIALS IN FLOWING SEAWATER. TO PREVENT THIS, THE PUMPS ARE

EQUIPPED WITH ZINC ANODES FIXED ON THE OUTER CASING AND DIFFUSER. ZINC, BEING

THIS LESS "NOBLE" METAL (MORE NEGATIVE POTENTIAL) GETS CORRODED THUS PREVENTING

CORROSION OF ALUMINUM AND STEEL. IT IS HOWEVER NECESSARY TO INSPECT THE

CONDITION OF THE REPLACEABLE ANODES PERIODICALLY AND REPLACE WHENEVER

NECESSARY. (INSPECTION ONCE IN A YEAR IS ENOUGH.)

NON REPAIRABLE ITEMS

1. ALL "O" RINGS TO BE REPLACED WHENEVER PARTS ARE DISMANTLED.

2. SEAL ELASTOMER PARTS SHOULD NEVER BE RE-USED AFTER DIS-ASSEMBLY.

3. DO NOT REFILL BEARING GREASE. ALWAYS REPLACE COMPLETE NEW BEARING WITH

SPECIAL HIGH TEMPERATURE GREASE.

ELECTRICAL INFORMATION:

MOTORS ARE DESIGNED TO OPERATE ON SINGLE VOLTAGE AND FREQUENCY. MAX. DEVIATION

IN VOLTAGE ALLOWED IS + - 6 % AND FREQUENCY +- 3%. CHECK NAMEPLATE FOR

OPERATING VOLTAGE AND FREQUENCY.

LINE TO LINE RESISTANCE VALUES FOR NINE LEAD STATORS

230V 460

G 506 T 0.63 Ω 2.5 Ω

G 536 T 0.45 Ω 1.80 Ω

G 556 T 0.31 Ω 1.23 Ω

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Mody-pumps G 556 T Manuel d'utilisateur Page 7