319B
319 and
408N
(opposite side)
1
1.
Correct level
Figure 39: Oil lubricated bearings
4.
Replace the oil fill pipe plug (319B).
5.11 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.
WARNING:
•
The mechanical seal used in an ATEX classified environment must be properly certified.
•
The mechanical seal must have an appropriate seal-flush system. Failure to do so will re-
sult in excess heat generation and seal failure.
This model uses these types of shaft seals:
•
Cartridge mechanical seal
•
Packed-stuffing-box option
5.11.1 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
5.11.2 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 illustra-
tions shipped with the seal.
If a flushless slurry seal was ordered, then consult manufacturers instructions for seal lubrication.
Seal flushing methods
Table 12: 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
5.11 Shaft-sealing options
XHD Installation, Operation, and Maintenance Manual
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Summary of Contents for XHD
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