MBH Ni-HARD Maintenance Manual
Instruction, Installation, Operation
and Maintenance Manual
Ni-HARD SUBMERSIBLE PUMP
© 2018 mbh pumps (gujarat) pvt. ltd.
ISO 9001
Certied Company
A Mark of Quality
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CROSS SECTION DRAWING
RECOMMENDATIONS
NO. DESCRIPTION MATERIAL
1 CABLE
2 GLAND COVER C.I. IS-210 FG260
3 EYE BOLT S.S.
4 TOP COVER C.I. IS-210 FG260
5 BEARING COVER C.I. IS-210 FG260
6 HEX BOLT S.S.
7 TOP BRG. COVER C.I. IS-210 FG260
8 HEX NUT S.S.
9 WINDING COPPER
10 END RING M.S.
11 STATOR STAMPING M-47
12 STATOR BODY C.I. IS-210 FG260
13 ROTOR SHAFT S.S. 410
14 BALL BEARING (D.E.) STD. MAKE
15 OIL CHAMBER C.I. IS-210 FG260
16 MECH. SEAL UPPER CR./ S.S.
17 MECH. SEAL LOWER SIC / SIC.
18 VOLUTE NI. HARD
19 IMPELLER NI. HARD
20 IMPELLER NUT S.S.
SPIRAL PLATE
21
(WEAR PLATE)
22 STRAINER S.S.
23 PUMP STAND M.S.
24 CUTTER S.S.
25 NECK RING S.S.
26 OIL PLUG S.S.
27 OIL HYLUBE MILCY Gr, 40
28 BALL BEARING (NDE) STD. MAKE
PVC. INSULATED
SHEATHED
NI. HARD
1. Follow maintenance schedule strictly, so as to avoid costly repairs in the long run.
2. ‘MBH’ Ni-hard submersible pumpsets are being supplied with special features
like over heating protection (Thermistor) and seal monitor sensor, control panel is
a mandatory supply with each and every pumpset. Ensure that pumpset is connected
properly to the control panel.
3. If pumping media available is falling short of the pump capacity, it will result in spurt, which
is harmful for the pump. In such a case reduce discharge by throttling.
4. Ensure that pump rotates in correct direction (clockwise). Counter clockwise rotation
result in lower discharge and increased wear. At instant of starting Ni-hard pump
should give anticlockwise jerk.
The rotation of impeller should match the arrow on the pump casing.
In case of reverse rotation the current consumption will rise and pumpset will produce
unwanted noise.
5. Avoid too many creases in the hosepipe (in case of portable installation), it results
in increased friction losses. Use the shortest possible delivery line.
6. Protect cable from damage-during storage, transportation and operation. A damaged
cable may give shock or burn the motor.
7. Always earth the unit, before starting.
8. Never hoist the pumpset up or down by the connecting cable.
9. Use NRV if pipe length is more than 4.5 mtrs.
PRECAUTION FOR LONG STORAGE
Clean the pump set with fresh water and wipe the cable. Put pump set in cool, dry
place in vertical position and the cable wrapped on top of the pump.
Do not leave cable on the oor where it is likely to get damaged.
CONSTRUCTION OF NI-HARD SUBMERSIBLE PUMPSET
‘MBH’ Ni-hard submersible pumps are of close couple compact design and have pump
below and motor above construction hence sump cleaning is possible to the minimum
level. These are powered by squirrel cage induction dry motors suitable for operation at
400/440 volts, 3 phase, 50 Hz, A.C. Supply; bearing of these pumps are grease packed.
Being a Submersible pump, it saves a lot of cost of construction compared to other
conventional pumps and also provides noise free operation. Pumps are tted with high
efciency non-clog or free ow impeller for smooth and economical pumping operation.
Since they work under pumping liquid, suction is always ooded, hence no need of
PORTABLE MOUNTING
The pump must be installed in vertical
motor position above on a solid oor.
For portable mounting, stand is supplied
along with the pumpset.
Suspend the pump from the chain and
shackle attached to the eye bolt which is
on the top cover.
priming or suction pipe. Pumps are tted with double mechanical seals to separate
motor chamber from oil chamber and oil chamber from liquid being pumped. Pumps
are provided with special safety devices like moisture detection sensor and thermistor
protection against high winding temperature. That can also be provided with special
lowering arrangement for easy access of the pump for maintenance.
© 2018 mbh pumps (gujarat) pvt. ltd. © 2018 mbh pumps (gujarat) pvt. ltd.
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Ni-Hard Submersible Pump
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Ni-Hard Submersible Pump
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