SPXFLOW CombiFlexBloc Series, Instruction Manual

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34 Disassembly and assembly
CFB/EN (1808) 2.4
7.7.4 Disassembling a mechanical seal M1
The item numbers used are referring to figure 11.
1 Remove the impeller, see paragraph 7.5.1 "Disassembling of the impeller".
2 Remove the nuts (1810) and push the mechanical seal cover (1230) backward.
3 Mark the position of the stuffing box cover (0110) in relation to the bearing bracket
(2100). Knock the stuffing box cover loose and remove it.
4 Pull the shaft sleeve (1200) from the pump shaft and remove the rotating part of the
mechanical seal from the shaft sleeve.
5 Pull the mechanical seal cover (1230) off the pump shaft and push the counter-ring
out of the cover.
7.7.5 Assembling a mechanical seal M1
➢
Special tools: the seal group M1 is easily mounted by using a special conical mounting
bush. The mounting bush covers the sharp edges on the shaft, which means that the risk
of damaging the seal during assembly is reduced. See figure 9.
1 Ensure the shaft sleeve (1200), the throttling bush (1210) and the splash ring (2220)
are undamaged. The splash ring should also clasp the pump shaft properly. If
necessary, replace these parts. In that case, secure the throttling bush (1210) with
Loctite 641.
2 Put the mechanical seal cover flat down and press the counter-ring of the seal
straight into it. If necessary, use a plastic pressure piece. Never hammer it inside!
The maximum axial turn of the counter-ring is 0,1 mm.
3 Place the electric motor with the shaft and the lantern piece upright and place a new
gasket (1300).
4 Push the mechanical seal cover onto the pump shaft.
Figure 11: Mechanical seal M1.