843V
843U
Figure 36: Oil mist plugs
Oil mist connections are provided on both the radial and thrust end of the bearing frame:
•
1/4 in. NPT connection on the radial side of the frame (228)
•
1/4 in. NPT connection on the thrust side of the frame (228).
Purge-oil mist lubrication provides intermittent oil mist in the frame. This system uses the oil sump in the
housing, and requires the oil ring and the constant-level oiler.
Pure-oil mist lubrication provides constant oil mist in the frame. This system does not use the oil sump,
oil ring, or constant-level oiler. The drain connections in the frame are used as part of the oil recirculation
system.
1.
On both the radial and thrust end replace the ¼" NPT plug (358F) with an oil mist fitting provided by
the oil system manufacturer.
2.
For pure-oil mist, connect the drain lines (408A) to the outlet connections. This is not required for
the purge-oil mist.
5.4.2.8 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. Coat the internal bearing surfaces with lubricant to be used in service.
5.5 Shaft sealing with a mechanical seal
Precautions
CAUTION:
Running a mechanical seal dry, even for a few seconds, can cause seal failure and physical
injury. Never operate the pump without liquid supplied to the mechanical seal.
NOTICE:
•
Follow seal manufacturer's guidelines for proper seal installation procedures.
Shipping
Pumps may be shipped with or without a mechanical seal installed.
5.5 Shaft sealing with a mechanical seal
58
Model 3700i API610 / Type OH2 Installation, Operation, and Maintenance Manual