CAUTION:
Running a mechanical seal dry, even for a few seconds, can cause seal failure and physi-
cal injury. Never operate the pump without liquid supplied to the mechanical seal.
1.
Slide the cartridge seal onto the shaft or sleeve until it contacts the inboard labyrinth oil seal.
2.
Assemble the seal chamber.
3.
Slide the cartridge seal into the seal chamber and secure using the four studs and nuts.
4.
Continue with the pump reassembly.
5.
Tighten the setscrews in the seal locking ring in order to secure the seal to the shaft.
6.
Remove the centering clips from the seal.
6.6.3.3 Seal the shaft with a conventional inside-component mechanical
seal
WARNING:
The mechanical seal used in an Ex-classified environment must be properly certified.
CAUTION:
Running a mechanical seal dry, even for a few seconds, can cause seal failure and physi-
cal injury. Never operate the pump without liquid supplied to the mechanical seal.
1.
Assemble the seal chamber:
a) Install a seal-chamber cover and fasten with hexagon head screws.
b) Install the shaft sleeve (524).
161
412.21
433
524
Figure 55: Install shaft sleeve
2.
Mark the shaft and sleeve at the face of the seal chamber.
3.
Continue the complete reassembly of the pump, except for the mechanical seal.
4.
Scribe a line on the marked shaft and sleeve at the face of the seal chamber.
5.
Remove the casing, the impeller, and the seal chamber.
6.
If applicable, slide the gland, with the stationary seat and gland gasket installed, onto the shaft
until it contacts the inboard labyrinth oil seal.
7.
Install the mechanical-seal rotary unit according to the manufacturer's instructions.
Use the scribed line and the seal-reference dimension.
8.
Reinstall the seal chamber.
9.
Slide the gland on the seal-chamber studs and secure them with the gland nuts.
Tighten the nuts evenly so that the gland is seated on the seal-chamber pilot and is perpendicu-
lar to the shaft.
10. Complete the reassembly of the pump.
6.6 Reassembly
Model IC, ICI, ICH, ICIH Installation, Operation, and Maintenance Manual
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