Edwards LR1A200 - Yearly Intervals; Inspect Pipelines and Connections; Inspect the Liquid Ring Pump; Maintenance Plan: Yearly Intervals

LRP200000201 Issue A
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Maintenance
5.2.2 Yearly intervals
5.2.2.1 Lubrication plan
5.3 Inspect pipelines and connections
1. Inspect all the process inlet and outlet pipelines and connections; check for corrosion or damage and ensure
there are no leaks. Replace any pipelines that are corroded or damaged. Check that all the process inlet and
outlet pipelines are secure. Tighten any connections that are loose and seal any leak found.
2. Inspect all the seal liquid pipelines and connections; check that they are not corroded or damaged and that
there are no leaks. Replace any pipelines that are corroded or damaged. Check that all the seal liquid pipelines
are secure. Tighten any connections that are loose and seal any leak found.
3. If installed, inspect all the cooling liquid pipelines and connections; check for corrosion or damage and ensure
there are no leaks. Replace any pipelines that are corroded or damaged. Check that all the cooling liquid
pipelines are secure. Tighten any connections that are loose and seal any leak found.
4. Inspect all the ancillary pipelines and connections; check for corrosion or damage and ensure there are no leaks.
Replace any pipelines that are corroded or damaged. Check that all the ancillary pipelines are secure. Tighten
any connections that are loose and seal any leak found.
5. Inspect all the electrical cables and connections; check for damage and have not overheated. Replace any
cables that are damaged or have overheated. Check that all the electrical connections are secure. Tighten any
connections that are loose.
5.4 Inspect the liquid ring pump
1. Inspect all casing joints; check for corrosion or damage and ensure there are no leaks. Replace any components
that are corroded or damaged and seal any leak found.
2. Inspect the drive end and non-drive end bearing housings, end casings and exposed drive shaft surfaces; check
for corrosion or damage and ensure there are no leaks. If there is corrosion damage or a leak, immediately shut
down the pumping system and investigate the cause.
3. Check the drive end and non-drive end bearing housing top surface temperatures. If the measured temperature
exceeds 60 °C, immediately shut down the pumping system and investigate the cause.
4. Check the drive end and non-drive end bearing housings for abnormal noise. If abnormal noise is present,
immediately shut down the pumping system and investigate the cause.
5. Check the pump casings for abnormal noise, caused by water hammer or cavitation. If abnormal noise is present,
slowly close the seal liquid regulating valve.
 If the abnormal noise stops, the noise was caused by water hammer. Pump operation can continue as normal
with the seal liquid regulating valve at the new set point.
Table 11 - Maintenance plan: yearly intervals
Operation Refer to
Inspect the drive motor Manufacturer's instructions
If installed, inspect the heat exchanger Section 5.6
Table 12 - Lubrication plan
Operation Refer to
Replenish liquid ring pump bearings Section 5.7
If applicable, lubricate drive motor bearings Manufacturer's instructions