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Maintenance
2. Inspect it.
3. Replace worn parts.
Bearing maintenance
These bearing lubrication sections list different temperatures of the pumped fluid. If the pump is
ATEX-certified and the temperature of the pumped fluid exceeds the permitted temperature
values, then consult your ITT representative.
Bearing lubrication schedule
Type of bearing
Oil-lubricated bearings
Mechanical-seal maintenance
WARNING:
The mechanical seal used in an Ex-classified environment must be properly certified. Prior to startup,
make sure that all areas that could leak pumped fluid to the work environment are closed.
CAUTION:
Never operate the pump without liquid supplied to mechanical seal. If you run a mechanical seal dry,
even for a few seconds, this can cause seal damage. Physical injury can occur if a mechanical seal fails.
NOTICE:
• Sealing systems that are not self-purging or self-venting, such as plan 23, require manual
• Cooling systems, such as those for bearing lubrication and mechanical-seal systems, must
• The mechanical seal must have an appropriate seal flush system or excess heat
Cartridge-type mechanical seals
Cartridge-type mechanical seals are commonly used. Cartridge seals are preset by the seal
manufacturer and require no field settings. Cartridge seals installed by the user require
disengagement of the holding clips prior to operation, allowing the seal to slide into place. If the
seal has been installed in the pump by ITT, these clips have already been disengaged.
Other mechanical seal types
For other types of mechanical seals, refer to the instructions provided by the seal manufacturer
for installation and setting.
Before you start the pump
Check the seal and all flush piping.
Mechanical seal life
The life of a mechanical seal depends on the cleanliness of the pumped fluid. Due to the
diversity of operating conditions, it is not possible to give definite indications as to the life of a
mechanical seal.
56
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
venting prior to operation. Failure to do so will result in excess heat generation and seal
failure.
be operating properly to prevent excess heat generation, sparks, and premature failure.
generation and seal failure can occur.
First lubrication
Add oil before you install and start After the first 200 hours, change
the pump. Change the oil after
200 hours for new bearings.
Lubrication intervals
the oil every 2000 operating hours
or every three months.
Manual
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Troubleshooting
