Flowserve MNV - Manual (Page 22)

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04
Page 22 of 47
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5 COMMISSIONING, START-UP,
OPERATION AND SHUTDOWN
These operations must be carried out
by fully qualified personnel.
To ensure safety, keep the power supply
turned off to the motor and pump accessories during
commissioning.
5.1 Pre-commissioning procedure
The gland is to be filled with grease and flush supply
to be in place. Flush piping to be checked for leaks.
Mechanical seals to be checked for leaks, flush flow
and pressure. In addition, follow the list below.
a) Pump bearings must be filled with the
recommended lubricant to avoid running dry and to
guarantee acceptable performance of the pump.
b) Check all vent connections for complete filling of
the pump.
c) Check the direction of rotation of the pump
(Coupling spacer dismantled).
d) The pump rotor and the shaft seal must be in
correct axial position.
e) Check the readiness of all auxiliary systems (seal
sys. lubrication sys.,) for start up.
f) All pipe work, including the internal and the
auxiliary pipe work, must be connected correctly
and must be absolutely tight. Check the tightness
of all connections of the auxiliary pipe work. The
suction valve must be open, the discharge valve
shall be closed or partially open as required.
g) Turn the pump by hand, if required with the help of
a lever, to check the free rotation of the rotor. The
rotor must turn uniformly and noiselessly. Some
resistance may be felt due to the friction in the
bearings and seals.
h) Check the readiness of the driver for start up.
Refer to driver User instructions before energizing the
motor.
5.2 Pump Lubrication
Determine the mode of lubrication of the pump set,
e.g. grease, oil, and product lubrication.
Recommended grease types with
their brand names and quantities are provided in
section 5.2.5. Grease lubricated pumps and electric
motors are supplied pre-greased.
5.2.1 Bearings – oil lubricated
MNV/MNZ pumps are furnished with grease
lubricated bearings as standard. At the customer’s
request, special arrangements can be made to
lubricate the bearings with oil. However, although
the oil and grease lubricated bearing frames are
physically interchangeable in whole, individual parts
may or may not be interchangeable. Check with the
nearest Flowserve Sales Representative to
determine inter-changeability of parts.
Before starting the pump, check the
lubricant level or the required quantity.
5.2.2 Bearings – grease lubricated
MNV & MNZ pumps are normally furnished with
grease lubricated bearings with grease fittings on the
line and thrust bearing ends of the bearing housing;
see sec 5.2.3.1.
Before starting the pump, check the bearing frame
cavities for grease and add grease as necessary.
The suggested frequency and grease quantity for re-
lubrication are provided in sec . 5.2.5.2
After start up, remove the grease fittings or pipe plug
closest to the cover and allow the excess grease to
flow out.
5.2.3 Filling the grease reservoir
The grease flowing out of the bearing
frame may be hot and under pressure . Bearings may
run slightly hot immediately after adding new grease.
Monitor the bearing temperatures until they return to
normal. Any marked increase in the temperature of
the bearings after return to normal operation may
indicate the presence of dirt in the bearing,
insufficient cleaning, improper re-assembly, or a
faulty/damaged bearing. In this case the pump
should be immediately stopped and the cause of the
trouble investigated.