Mody Pumps NC 06360_08360_10360-M - Manual (Page 3)

GENERAL INFORMATION.
THE
“mody”
NC-M SERIES LINE OF SUBMERSIBLE PUMPS ARE PRIMARILY DESIGNED FOR
HANDLING SLUDGE AND SOLIDS. THEY CAN ALSO BE USED FOR HANDLING WASTE WATER, FLY
ASH, CERAMIC SLIP AND IN OTHER ALLIED APPLICATIONS WHERE THE CONCENTRATION OF
SUSPENDED SOLIDS IS HIGH.
THE SERVICE LIFE OF A SUBMERSIBLE PUMP DEPENDS MAINLY ON TWO THINGS: THE
DEPENDABILITY OF THE SEALING SYSTEM AND THE WEAR RESISTANCE OF THE PUMP ITSELF.
IN THE NC-M SERIES PUMPS, THE WEAR PLATE IS RUBBERLINED WHILE THE VOLUTE AND
IMPELLER ARE MADE OF CAST STAINLESS STEEL. THE IMPELLER IS A RECESSED VORTEX
DESIGN THAT ALLOWS THE PUMP TO HANDLE 2 1/2" SPHERICAL SOLIDS. ALL LARGE
PARTICLES ARE SUCKED IN USING THE VORTEX CREATED BY THE IMPELLER AND PASS OUT
DIRECTLY THROUGH THE DISCHARGE.
ALL MODELS HAVE BUILT-IN THERMAL PROTECTION, WHICH CAN BE AUGMENTED WITH AN
OVERCURRENT RELAY. IT IS HOWEVER RECOMMENDED THAT IRRESPECTIVE OF TYPE OF PUMP,
ADEQUATE MOTOR PROTECTION SWITCHGEAR SHOULD BE USED AT THE INSTALLATION. WE
STRONGLY RECOMMEND THE USE OF SUITABLE CONTROL PANELS WHICH ARE AVAILABLE FROM
US INCORPORATING ALL REQUIRED PROTECTION.
IT IS IN THE INTEREST OF THE USER THAT HE GO THROUGH THIS MANUAL IN DETAIL
PRIOR TO USING THE PUMP. THIS MANUAL WILL HELP HIM UNDERSTAND THE
CONSTRUCTIONAL FEATURES AND TO OBTAIN TROUBLE FREE SERVICE FROM 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 (LOWER SEAL) AND TUNGSTEN
CARBIDE V/S TUNGSTEN 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 BAG - CREATES THE ULTIMATE SEAL SOLUTION. THE DESIGN
OPTIMIZES SEAL LIFE AND ALLOWS FOR SIX MONTHLY (2500 HRS) SERVICE INTERVALS.
D] BEARINGS: SINGLE ROW DEEP GROOVE BALL BEARING (UPPER), DOUBLE ROW ANGULAR
CONTACT BEARING (LOWER) SEALED FOR LIFE WITH A SPECIAL HIGH TEMPERATURE BEARING
GREASE REQUIRING NO PERIODIC MAINTENANCE WHATSOEVER.
E] THE HYDRAULIC ELEMENTS : A RECESSED VORTEX STAINLESS STEEL IMPELLER
(AVAILABLE IN CORROSION RESISTANT 304 SS OR IN ABRASION RESISTANT 410 HARDENED
SS RUNNING AGAINST A RUBBERLINED WEAR PLATE. THE VOLUTE IS STAINLESS STEEL OF
AISI 304 QUALITY, DESIGNED FOR LARGE SOLID HANDLING CAPACITY OF 2 1/2"