12 Servicing
12.6 Replacing the mechanical seal
12.6.3
Removing the mechanical seal (DL3/DL4/DS3/DS4)
Personnel qualification:
o
Fitter
Personal protective equipment:
o
Work clothing
o
Protective gloves
o
Safety boots
Aids:
o
Extractor
Requirement:
ü
Cartridge pump removed
1
2
3
4
5
8
7
6
1.
Remove the feather key
1
from the main screw
7
.
2.
Remove the circlip
2
and mounting ring
3
from the pump housing
8
.
3.
Remove the O-ring
4
and press the stationary seal ring
5
together with the O-ring from the
mounting ring.
4.
Standard mechanical seal:
Remove the rotary seal ring with spring
6
from the main screw.
Mechanical seal of hard material
(without figure): Loosen the threaded pins. Remove the rotary
seal ring and associated parts of the mechanical seal from the main screw.
12.6.4
Installing the mechanical seal (DL3/DL4/DS3/DS4)
Personnel qualification:
o
Fitter
Personal protective equipment:
o
Work clothing
o
Protective gloves
o
Safety boots
Aids:
o
Silicone grease
1
2
3
4
5
8
7
6
1.
Clean the fitting surfaces, grease the O-ring of the stationary seal ring
5
.
2.
Press the stationary seal ring with O-ring into the mounting ring
3
. Take the position of the recess
for the dowel pin (anti-rotation screw).
3.
Clean the main screw
7
carefully in the area of the mechanical seal and grease it.
4.
Standard mechanical seal
: Push the rotary seal ring with spring
6
onto the main screw.
Mechanical seal of hard material
(without figure): Slide the rotary seal ring and associated parts
of the mechanical seal onto the main screw and tighten the threaded pins.
5.
Clean the sliding surfaces of the mechanical seal carefully and grease lightly with silicone grease.
6.
Insert the O-ring
4
and mount the mounting ring.
7.
Mount the circlip
2
.
8.
Mount the feather key
1
on the main screw.
Operating instructions
OID 06en-GB Edition 2019-11
35