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ISO PRO Centrifugal Pump
Section 7..........................................................Maintenance and Servicing
1. SAFETY INSTRUCTIONS WHILE MAINTENANCE & SERVICING
• Before attempting any maintenance on a pump particularly if it has been handling any form of
hazardous liquid, it should be ensured that the unit is safe to work on. The pump must be flushed
thoroughly with suitable cleaner to purge away any of the product left in the pump components. To
avoid any risk to health it is also advisable to wear protective clothing as recommended by the site
safety officer especially when removing old packing which may be contaminated.
• Check and ensure that the pump operates at below the maximum working pressure specified in the
manual or on the pump nameplate and before maintenance, ensure that the pump is drained down.
• Be aware of the hazards relating to the pumped fluid, especially the danger from inhalation of
noxious and toxic gases, skin and eye contact or penetration. Obtain and understand the hazardous
substance data sheets relating to the pumped fluid and note the recommended emergency and first
aid procedures.
• Isolate the equipment before any maintenance work is done. Switch off the mains supply, remove
fuses, apply lock-outs where applicable and affix suitable isolation warning signs to prevent
inadvertent reconnection. In order to avoid the possibility of maintenance personnel inhaling
dangerous fumes or vapors, it is recommended that the maintenance work be carried out away
from the pump locations by removal of bearing housing and shaft assembly to a suitable to a
suitable maintenance area.
2. MAINTENANCE CHECKLIST
Preventive maintenance schedule is the periodical checks and precautions by which possibilities of
failure and breakdown are made very remote.
2.1 Daily Checks
a) Pressure gauge reading.
b) Bearing temperature.
c) Leakage through stuffing box.
d) Noise and vibration.
e) Voltage and current.
f) Constant flow of external sealing liquid if provided.
g) Check all lubricant levels
h) On grease lubricated pumps, check running hours since last recharge of grease or complete grease
change.
2.2 Periodical Maintenance
i) Replenish the grease.
j) Change the stuffing box packing.
k) Check the alignment of the pump set.
l) Calibrate the measuring instruments.
m) Check all paint or protective coatings.
n) Check all power/instrument cable glands for tightness.
o) Check the sealing connections for leakage etc.
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