Chapter 5 Maintenance and Inspection
UD-series Screw Compressor
5.2 Maintenance and Inspection List
5-5
5.2.2
Periodic Inspection
Inspect the following points at specified intervals.
Table 5-3 Periodic Inspection Items
Item
Inspection interval
Remarks
Pressure sensors
Annually
Temperature sensors
Annually
Protection devices and
safety valves
Annually
Suction strainer
Inspection after the first 500h of
operation
If the differential pressure between
the front and back of the suction
strainer increses, inspect and clean
the suction strainer
Inspect and clean annually
Lubricant
Replace after the first 500h of
operation
If the analysis results do not satisfy
the management criteria provided
in” 4.1.4 Management of Lubricant,
in this manual, replace oil.
Analyze lubricant at intervals of 6
months
Oil filter
Replace annually
Replace the filter element if the
pressure difference between the
inlet and outlet ports of the oil filter
exceeds 0.1 MPa.
Cooling water side of oil
cooler
Annually
Clean the oil cooler if it is confirmed
that it is heavily contaminated.
Cooling water side of
condenser
Annually
Clean the oil cooler if it is confirmed
that it is heavily contaminated.
Mechanical seal
Annually or every 8,000 operating
hours
*
To be replaced if any abnormality is
found.
However, in the case that it is
difficult to stop the operation not at
regular inspection replace the
mechanical seal assembly at every
inspection.
Coupling
Annually or every 8,000 operating
hours
*
Note*: Inspect the machine per period or operating hours, whichever comes first..
