Goulds Pumps 3393 - IOM - Manual (Page 43)

Commissioning, Startup, Operation, and Shutdown
2. Check that the oil level is correct. The correct oil level is centered in the bullseye sight
glass, when the pump is not in operation. During operation, bullseye sight gives a false oil
level reading.
1. Plug
2. Reservoir
3. Main body
Purge Oil Mist
The 3393 can be modified for purge oil mist lubrication. Consult a factory representative for
details.
Lubricate the bearings after a shutdown period
1. Flush out the bearings and bearing frame with a light oil to remove contaminants.
During flushing, make sure to rotate the shaft slowly by hand.
2. Flush the bearing housing with the proper lubricating oil to ensure oil quality after cleaning.
3. Refer to "Reassembly" section for proper bearing greasing procedure.
Shaft sealing with a mechanical seal
The mechanical seal used in an ATEX classified environment must be properly certified.
Precautions
WARNING:
The mechanical seal used in an ATEX or 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.
NOTICE:
• The mechanical seal must have an appropriate seal-flush system. Otherwise, excess heat
generation and seal failure can occur.
• Cooling systems such as those for bearing lubrication and mechanical-seal systems must
be operating properly to prevent excess heat generation, sparks, and premature failure.
• Sealing systems that are not self-purging or self-venting, such as plan 23, require manual
venting prior to operation. Failure to do so will result in excess heat generation and seal
failure.
Shipping
Pumps may be shipped with or without a mechanical seal installed.
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
Model 3393 Installation, Operation, and Maintenance Manual 41