Goulds Pumps XHD - IOM - Manual (Page 55)

Commissioning, Startup, Operation, and Shutdown
3. Fill the bearing frame with oil until the oil level reaches the middle of the sight glass or
opposite sight glass (319 or 408N).
1. Correct level
Figure 14: Oil lubricated bearings
4. Replace the oil fill pipe plug (319B).
Shaft-sealing options
In most cases, the manufacturer seals the shaft before shipping the pump. If your pump does
not have a sealed shaft, see the Shaft-seal maintenance section in the Maintenance chapter.
This model uses these types of shaft seals:
• Cartridge mechanical seal
• Packed-stuffing-box option
Mechanical seal options
Pumps are usually shipped with mechanical seals installed. If they are not, then refer to the
mechanical seal manufacturer's installation instructions.
These are the mechanical seal options for this pump:
• Cartridge mechanical seal
Connection of sealing liquid for mechanical seals
Seal lubrication is required
Seal faces must have liquid film between them for proper lubrication. Locate the taps using the
illustrations shipped with the seal.
If a flushless slurry seal was ordered, then consult manufacturers instructions for seal
lubrication.
Seal flushing methods
You can use these methods in order to flush or cool the seal:
Method Description
Product flush Run the piping so that the pump pushes the pumped fluid from the casing and
injects it into the seal gland. If necessary, an external heat exchanger cools the
pumped fluid before it enters the seal gland.
External flush Run the piping so that the pump injects a clean, cool, compatible liquid directly into
the seal gland. The pressure of the flushing liquid must be 5 to 15 psi (0.35 to 1.01
kg/cm
2 ) greater than the seal chamber pressure. The injection rate must be 0.5 to
2 gpm (2 to 8 lpm).
Other You can use other methods that employ multiple gland or seal chamber
connections. Refer to the mechanical seal reference drawing and seal flush/
cooling piping diagrams.
XHD Installation, Operation, and Maintenance Manual 53