11
MAINTENANCE
For both models
1.
Install gasket on backplate.
2.
Place the casing in position and close and tighten the clamp while lightly tapping the clamp with a
hammer to ensure even tightening. Assemble seal guard and tighten nut.
3.
Assemble the cascading water attachment, if so equipped, to the adapter. Close and tighten the
clamp. Assemble the suction and discharge piping to the pump. Check for strain on the casing.
Adjust as necessary.
EXTERNAL BALANCED SEALS - SETTING SEAL DRIVE COLLAR LOCATION
The balanced seal is designed for outside applications, and is available with cascading water
attachment. Sealing of the process fluid along the shaft is accomplished by action of the process
pressure on an o-ring seal installed in a groove in the carbon seal. The same action pressurizes the
o-ring groove and augments the spring tension in keeping a tight joint at the sealing faces. The width
of the seal face controls balancing of the seal. This type of seal should be replaced when the
clearance between the carbon seal face and the backplate is less the
1
/
32
" (.79mm), or when leakage
is noted.
To replace the seal:
1.
Disconnect the suction and discharge piping, and remove the casing, impeller and backplate.
2.
Assemble the spring, seal cup, o-ring seal and carbon seal, and install as a unit, taking care that
slot in seal cup is aligned with pin on drive collar. Gentle finger pressure will overcome o-ring
resistance on the shaft.
When the carbon seal is replaced, the location of the drive collar should be checked and relocated if
necessary, by one of the two following methods.
Summary of Contents for C-Series
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