Flowserve NMD - Manual (Page 23)

NMD, NMAD USER INSTRUCTIONS ENGLISH 71576436 - 11/09
Page 23 of 40
6.2 Maintenance schedule
It is recommended that a maintenance plan
and schedule is adopted, in line with these User
Instructions. It should include the following:
a) The pump must be completely vented and
drained and rendered inert before any
disassembly operation.
b) Any auxiliary systems installed must be
monitored, if necessary, to ensure they function
correctly.
c) During cleaning of the pump ensure the
compatibility between the cleaning products and
the gaskets.
d) Verify the condition of the gaskets.
e) Gland packings must be adjusted correctly to
give visible leakage and concentric alignment of
the gland follower to prevent excessive
temperature of the packing or follower.
Mechanical seals should present no leakage.
f) Check for any leaks from gaskets and seals.
The correct functioning of the shaft seal must be
checked regularly.
g) Check bearing lubricant level, and if the hours
run show a lubricant change is required.
h) Check that the duty condition is in the safe
operating range for the pump.
i) Check vibration, noise level and surface
temperature at the bearings to confirm
satisfactory operation.
j) Check the tightness of the connections.
k) Check dirt and dust is removed from areas
around close clearances, bearing housings and
motors.
l) Check coupling alignment and re-align if
necessary.
m) Verify the correct operation of the system.
The equipment used for maintenance and
disassembly in an ATEX zone must be in conformity
with the requirements zone.
Our specialist service personnel can help with
preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.
If any problems are found the following sequence of
actions should take place:
a) Refer to section 7, Faults; causes and remedies,
for fault diagnosis.
b) Ensure equipment complies with the
recommendations in this manual.
c) Contact Flowserve if the problem persists.
6.2.1 Standard maintenance
Roller bearing
The bearings fitted are prepacked with grease at the
factory. When the regreasing period is reached it is
necessary to remove as much of the old grease as
possible with a clean lint free cloth and repack the
bearings with fresh grease.
Lubrication
Frequency *
Quantity
Pump type
1450 min -1 (cm 3 )
102 NMD 8000 40
122 NMD 7000 30
152 NMD 6000 40
202 NMD 5500 60
252 NMD 5000 60
* At least once a year.
The grease used in factory for first filling is:
SHELL ALVANIA R2
Its equivalents: MOBIL : Mobilux EP 2,
TOTAL : Multis 2,
ELF : ELF MULTI
6.2.2 Routine inspection (daily/weekly)
The following checks should be made
and the appropriate action taken to remedy any
deviations:
a) Check operating behavior. Ensure noise,
vibration and bearing temperatures are normal.
b) Check that there are no abnormal fluid or
lubricant leaks (static and dynamic seals) and
that any sealant systems (if fitted) are full and
operating normally.
c) Pump fitted with a stuffing box: leakage of 20
drops per minute.
d) Pump fitted with a mechanical seal: no leakage.
e) Check the level and condition of oil lubricant. On
grease lubricated pumps, check running hours
since last recharge of grease or complete
grease change.
6.2.3 Periodic inspection (six monthly)
a) Check foundation bolts for
security of attachment and corrosion.
b) Check pump-running records for hourly usage to
determine if bearing lubricant requires changing.
c) The coupling should be checked for correct
alignment and worn driving elements.