Mody Pumps MS 6202 - Manual (Page 3)

GENERAL INFORMATION.
THE
“MS” SERIES OF MODY'S SUBMERSIBLE SEWAGE PUMPS ARE PRIMARILY DESIGNED FOR
HANDLING SEWAGE, SLUDGE, SLURRIES, WASTEWATER AND LIQUID MANURE. THEY CAN ALSO
BE USED FOR HANDLING STORMWATER DRAINAGE WITH HIGH SOLIDS CONTENT.
THE SERVICE LIFE OF A SUBMERSIBLE PUMP PRIMARILY HINGES ON TWO ASPECTS: THE
DEPENDABILITY OF THE SEALING SYSTEM AND THE WEAR RESISTANCE OF THE PUMP ITSELF.
THE “MS” SERIES OF PUMPS ARE AVAILABLE WITH A WIDE RANGE OF IMPELLERS TO SUIT
PRACTICALLY EVERY PUMPING DUTY WITH HIGH EFFICIENCES. THE MS 6100 & 6200
SERIES
HAVE TWO MODELS AS UNDER :
1. MS 6152 15HP SINGLE CHANNEL IMPELLER WITH 100MM/4” SOLID HANDLING CAPACITY.
2. MS 6202 20HP SINGLE CHANNEL IMPELLER WITH 100MM/4” SOLID HANDLING CAPACITY.
THE SINGLE CHANNEL IMPELLERS ARE IN CAST IRON CONSTRUCTION. THE PUMP VOLUTES
ARE ALSO IN CAST IRON WITH SMOOTH PROFILED GEOMETRY FOR CLOG FREE OPERATION AND
HIGH EFFICIENCES. COMPLETE STAINLESS STEEL CONSTRUCTION AVAILABLE. ALL VOLUTES
ARE FITTED WITH REPLACEABLE WEAR RINGS.
IT IS IN THE INTEREST OF THE USER THAT HE/SHE GO THROUGH THIS MANUAL IN DETAIL
PRIOR TO USING THE PUMP.
TECHNICAL DESCRIPTION
.
THE PUMPSET IS IN A MODULAR CONSTRUCTION ENSURING EASY AND SIMPLE
SERVICEABILITY. THE MAJOR DESIGN FEATURES ARE AS UNDER:
A] THERMAL PROTECTION : SEE UNDER "MOTOR PROTECTION" .
B] THE MOTOR: A RUGGED ALUMINUM DIE CAST ROTOR, DYNAMICALLY BALANCED TO GRADE
2.5 ACCURACY OF ISO 942. A STAINLESS STEEL SHAFT RUNNING IN TWO DEEP GROOVE
BALL BEARINGS. INSULATION CLASS "F" (155 DEGREES CELSIUS). END WINDINGS DULY
EPOXY COATED TO PREVENT DETERIORATION OF INSULATION EVEN IN EXTREMELY HUMID
CONDITIONS. WINDING WIRE IS DUAL COATED SUITABLE FOR "H" CLASS INSULATION.
C] THE SEAL CHAMBER: THE HEART OF THE "MODY" PUMP. DUAL MECHANICAL SEALS,
TUNGSTEN CARBIDE V/S TUNGSTEN CARBIDE SEAL FACES. SECONDARY SEALS OF NITRILE
RUBBER AND METAL PARTS IN STAINLESS STEEL, RUNNING IN AN OIL BATH. THE SEALS
HAVE BEEN SPECIFICALLY DESIGNED WITH EXTREMELY SHORT WORKING LENGTHS KEEPING
IMPELLER OVERHANG TO THE MINIMUM. THIS ENSURES EXTENDED SEAL AND BEARING LIFE.
D] BEARINGS: DOUBLE ROW ANGULAR CONTACT LOWER BEARING, WITH SINGLE ROW DEEP
GROOVE UPPER BALL BEARING GREASED FOR LIFE WITH A SPECIAL HIGH TEMPERATURE
BEARING GREASE REQUIRING NO PERIODIC MAINTENANCE WHATSOEVER.
E] THE HYDRAULIC ELEMENTS: SINGLE CHANNEL IMPELLERS WITH LARGE SOLID HANDLING
CAPACITY. SMOOTH PROFILED VOLUTES FOR HIGH EFFICIENCES.
F] CABLE GLAND ASSEMBLY: THE PUMP IS SUPPLIED WITH 50’ CABLE AS STANDARD. THE
CABLE IS AWG #8 SOOW 4 CORE WITH AN OPTION AVAILABLE FOR 6 CORE WHEN THERMAL
OVERLOADS ARE REQUIRED. THE CABLE IS TERMINATED IN THE PUMP AT THE CABLE GLAND.
THE GLAND ASSEMBLY SEALS THE CABLE ON THE OUTSIDE SHEATH. A WATER DAM
ARRANGEMENT IS ALSO 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 TERMINAL CHAMBER IN THE EVENT OF A CUT CABLE. THE
CABLE IS ALSO SHEATHED FOR THE 1ST ONE METRE LENGTH 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.