7 Servicing/Maintenance
53 of 68
Multitec A SX
Installing the mechanical seal
L
D
Ø
Fig. 22:
Adjusting dimension L for mechanical seal
Table 15:
Adjusting dimension L for mechanical seal, seal codes 55, 62, 63, 67, 68
Size
Seal code
Diameter D
mechanical seal
[mm]
Adjusting dimension
L
[mm]
62
100
H12N
50
28
The following rules must be observed when installing the mechanical seal:
▪
For installing the mechanical seal, proceed as shown in the seal installation
drawing.
▪
Work cleanly and accurately.
▪
Only remove the protective wrapping of the seal faces immediately before
installation takes place.
▪
Prevent any damage to the sealing surfaces or O-rings.
▪
After inserting the mating ring, check that it is plane-parallel in relation to the
casing part.
▪
The surface of the shaft protecting sleeve must be absolutely clean and smooth,
and the sleeve's mounting edge must be chamfered.
▪
When sliding the rotating assembly onto the shaft protecting sleeve, take
appropriate steps to protect the surface of the shaft protecting sleeve from
damage.
ü
The notes and steps stated in
(
ð
Section 7.5.1, Page 51)
to
(
ð
Section 7.5.2, Page 51)
have been observed/carried out.
ü
The bearing assembly and the individual parts of the mechanical seal are kept in
a clean and level assembly area.
ü
All disassembled parts have been cleaned and checked for wear.
ü
Any damaged or worn parts have been replaced by original spare parts.
ü
The sealing surfaces have been cleaned.
1.
Depending on the mechanical seal design, proceed as follows:
Installing the standard mechanical seal
1.
Fit O-ring 412.4 on the shaft.
2.
Fit seal housing 441.1 with O-ring 412.5 and two studs 902.2 on the shaft.
3.
Fit the rotating assembly (primary ring) of mechanical seal 433.1 on shaft
protecting sleeve 523.1 (observing adjusting dimension L).
4.
Slip shaft protecting sleeve 523.1 with the pre-assembled rotating assembly of
mechanical seal 433.1, or shaft sleeve 523.2 with the rotating assembly of
mechanical seal 433.2 (depending on seal code) onto the shaft.
5.
Fit key 940.2.
6.
Carefully press the stationary mating ring of mechanical seal 433.1 or 433.2 into
seal cover 471.1.
7.
Fit seal cover 471.1 with gasket 400.1.
8.
Insert and tighten nuts 920.3.
9.
Connect circulation line 710.2 (depending on seal code).
