Table 19: Installation dimensions of the mechanical seal
Shaft unit
10)
Installation dimension b
25
7.5 mm
35
10 mm
55
15 mm
7.5.3.2 Packing the gland
d
a
d
i
l
Fig. 18: Gland packing chamber
Table 20: Gland packing chamber
Shaft unit
11)
Gland packing chamber
Packing cross-
section
Packing rings
12)
Ø d
i
Ø d
a
l
25
30
46
45
□
8 x 126
3 packing rings
1 lantern ring
35
40
60
56
□
10 x 165
3 packing rings
1 lantern ring
55
50
70
56
□
10 x 196
3 packing rings
1 lantern ring
✓
The notes and steps stated in (
have been observed/carried out.
✓
The assembled bearing/gland packing as well as the individual parts are kept in a
clean and level assembly area.
✓
All disassembled parts have been cleaned and checked for wear.
✓
Any damaged or worn parts have been replaced by original spare parts.
✓
The sealing surfaces have been cleaned.
Packing ring cut to size
1. Clean the packing chamber.
2. Insert packing ring 461 into the packing chamber of discharge cover 161.1.
3. Use stuffing box ring 454 to push home packing ring 461.
Insert lantern ring 458, if any (see drawing above).
Insert each subsequent packing ring with its joint displaced by approximately 90°
in relation to the previous one. Use stuffing box ring 454 to push each packing
ring separately into the packing chamber.
4. Place gland follower 452 on studs 902.2 and tighten gently and evenly with
hexagon nuts 920.2, so that packing rings 461 are not compressed yet.
5. Use a feeler gauge to verify that gland follower 452 is mounted centred and at a
right angle to the shaft.
Fig. 19: Packing ring cut
to size
10)
Shaft unit see data sheet.
11)
Shaft unit see data sheet.
12)
For operation with positive suction head and suction pressure > 0.5 bar, the lantern ring is replaced by two additional
packing rings.
7 Servicing/Maintenance
48 of 66
Etanorm
