Mody Pumps MHMXP 6 X 12 - Manual (Page 3)

GENERAL INFORMATION.
THE
“MHMXP” SERIES OF MODY'S SUBMERSIBLE SEWAGE PUMPS ARE PRIMARILY DESIGNED FOR
HANDLING HIGH QUANTITIES OF ABRASIVES LIKE FLY ASH, SEWAGE, SLUDGE, WASTEWATER
AND LIQUID MANURE IN CLASS 1 DIVISION 1 GROUP C & D ENVIRONMENTS. 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
“MHMXP” SERIES OF PUMPS ARE AVAILABLE WITH A WIDE RANGE OF IMPELLERS TO
SUIT PRACTICALLY EVERY PUMPING DUTY WITH HIGH EFFICIENCES AND DIFFERENT
IMPELLER TRIMS AND ARE AVAILABLE IN CD4MCU AS WELL AS IN NI-HARD CONSTRUCTION.
THE MHMXP HAS A VORTEX IMPELLER WITH PUMP OUT VANES ON THE BACK SIDE AND A
MINIMUM 75MM/3” SOLIDS HANDLING CAPABILITY.
IMPELLERS ARE IN NI-HARD CONSTRUCTION. THE PUMP VOLUTES ARE ALSO IN NI-HARD
WITH SMOOTH PROFILED GEOMETRY FOR CLOG FREE OPERATION AND HIGH EFFICIENCES. ALL
VOLUTES ARE FITTED WITH WEAR RINGS WHEN EQUIPPED WITH CHANNEL IMPELLERS.
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: FM APPROVED EXPLOSION PROOF CLASS 1, DIV. 1, GROUP C & D THREE
PHASE AIR FILLED CONTINUOUS DUTY RATED (15 MIN. IN AIR) SQUIRREL CAGE MOTOR
WITH DIE CAST ALUMINUM ROTOR. BI-METALLIC SWITCHES EMBEDDED IN STATOR WINDING
TO PROTECT AGAINST OVERHEATING. STATOR INSULATION CLASS “F”.
C] THE SEAL CHAMBER: THE HEART OF THE "MODY" PUMP. DOUBLE MECHANICAL SEALS,
STANDARD UPPER SEAL IS CARBON/CERAMIC (OPTIONAL SILICON CARBIDE/SILICON
CARBIDE, LOWER SEAL IS SILICON CARBIDE/SILICON CARBIDE. SECONDARY SEALS OF
NITRILE RUBBER AND METAL PARTS IN STAINLESS STEEL, RUNNING IN AN OIL BATH.
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/VORTEX AND THREE VANE IMPELLERS WITH
LARGE SOLIDS HANDLING CAPACITY. SMOOTH PROFILED VOLUTES FOR HIGH EFFICIENCES.
F] CABLE GLAND ASSEMBLY: THE PUMP IS SUPPLIED WITH 25’ POWER CABLE AS
STANDARD. THE CABLE IS SIZED ACCORDING TO MOTOR HP. 25’ TRAILING CABLE
INCORPORATING THERMAL OVERLOADS AND SEAL PROBE SENSOR ARE STANDARD. THE CABLE
IS TERMINATED IN THE PUMP AT THE CABLE GLAND. THE GLAND ASSEMBLY SEALS THE
CABLE ON THE OUTSIDE SHEATH USING A CABLE GROMMET.
G] ELECTRICAL INFORMATION: MOTORS ARE DESIGNED TO OPERATE ON SINGLE VOLTAGE
AND FREQUENCY. MAXIMUM DEVIATION IN VOLTAGE ALLOWED IS -/+ 6% AND FREQUENCY -/+
3%. CHECK NAME PLATE FOR OPERATING VOLTAGE AND FREQUENCY.