Maintenance
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TT
Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
Maintenance
Maintenance schedule
Maintenance inspections
A maintenance schedule includes these types of inspections:
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Daily routine inspections
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Weekly routine inspections
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Three-month inspections
•
Annual inspections
Shorten the inspection intervals appropriately if the pumped fluid is abrasive or corrosive or if
the environment is classified as potentially explosive.
Daily routine inspections
Perform these tasks whenever you check the pump during routine inspections:
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Check oil level in the bearing housings.
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Listen for unusual noise, vibration.
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Measure the bearing temperatures.
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Check the pump and piping for leaks.
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Check that there is no leakage from the mechanical seal.
Weekly routine inspections
Perform these tasks every week:
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Run any idle pumps under power.
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Check operation of suction and discharge valves
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Check all automatic controls and regulators
Three-month inspections
Perform these tasks every three months:
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Check that the foundation bolts are tight.
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Check the mechanical seal if the pump has been left idle and replace as required.
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Change the oil every three months (2000 hours) at minimum, or more often if there are
adverse atmospheric or other conditions that might contaminate or break down the oil.
•
Check the shaft alignment and realign as required.
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Check the pump and motor hold down bolts for proper tightness.
Annual inspections
Perform these inspections one time each year:
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Check the pump flow rate against a known differential pressure.
•
Check the pump power consumption.
If the pump performance does not satisfy your process requirements, and the process
requirements have not changed, then perform these steps:
