Mody Pumps G 506_536_556T_SS316 - Manual (Page 6)

THE SEAL CHAMBER
THE HEART OF THE MODY PUMP. DUAL MECHANICAL, SILICON CARBIDE V/S SILICON
CARBIDE SEAL FACES (LOWER SEAL) AND SILICON CARBIDE V/S SILICON CARBIDE (UPPER
SEAL), SECONDARY SEALS OF HNBR RUBBER AND METAL PARTS IN STAINLESS STEEL,
RUNNING IN AN OIL BATH, ENCLOSED IN A PRESSURE COMPENSATING RUBBER OIL BAG
-CREATES THE ULTIMATE SEAL SOLUTION. THE DESIGN OPTIMIZES SEAL LIFE AND ALLOWS
FOR SIX MONTHLY (2500 HOURS) SERVICE INTERVALS.
BEARINGS:
SINGLE ROW DEEP GROOVE BALL BEARINGS SEALED FOR LIFE WITH SPECIAL HIGH
TEMPERATURE BEARING GREASE REQUIRING NO PERIODIC MAINTENANCE WHATSOEVER.
THE HYDRAULIC ELEMENTS :
TWO STAINLESS STEEL IMPELLERS IN TANDEM RUNNING AGAINST A RUBBER LINED
DIFFUSERS AND A GUIDE PLATE, CONSTITUTE THE HYDRAULIC ELEMENTS OF THE PUMP. THE
IMPELLERS/DIFFUSERS CAN BE ADJUSTED TO MAINTAIN MAXIMUM OUTPUT AFTER USAGE
WITHOUT PARTS REPLACEMENT. IT IS IMPORTANT, HOWEVER, TO MAINTAIN CLEARANCES
BETWEEN THE WEAR PARTS.
CABLE GLAND ASSEMBLY. (REFER DRG.)
THE PUMP IS SUPPLIED WITH 50 FEET CABLE AS STANDARD. THE CABLE IS AWG 14 - 6
CORE EPR SHEATHED AND INSULATED CABLE CONFORMING TO UL STANDARDS. THE CABLE IS
WATERPROOF AND CAN BE COMPLETELY SUBMERGED IN WATER. THE CABLE IS TERMINATED IN
THE PUMP AT THE CABLE GLAND. THE GLAND ASSEMBLY SEALS THE CABLE ON THE OUTSIDE
SHEATH AS WELL AS A WATER DAM ARRANGEMENT IS PROVIDED WHICH SEALS THE
INDIVIDUAL CORES OF THE CABLE. THIS FEATURE IS UNIQUE AND IS ESSENTIAL TO
PREVENT WATER SEEPING THROUGH THE CORES OF THE CABLE INTO THE CONTACTOR CHAMBER
IN THE EVENT OF A CUT CABLE. THE CABLE IS ALSO SHEATHED FOR THE FIRST ONE METER
BY MEANS OF A CABLE GRIP MADE OF STAINLESS STEEL. THIS IS ESSENTIAL TO ENSURE
THAT THERE IS NO UNDUE STRAIN ON THE CABLE IF THE PUMP IS PULLED OR LOWERED
INADVERTENTLY BY MEANS OF THE CABLE. COMPLETE DETAILS OF THE CABLE GLAND
ASSEMBLY ARE SHOWN IN THE DRAWING.
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.