KRAL C Series - Installing the Mechanical Seal

12 Servicing
12.4 Replacing the mechanical seal (inner bearing)
16 16
17
1 1
5. Mechanical seal standard/with throttle ring/with quench: (figure left):
Remove the rotary seal ring16 from the main screw1.
-or-
Mechanical seal hard material (figure right):
Loosen the fixing screws17 of the mechanical seal (quantity depends on size). Remove the
rotary seal ring16 from the main screw1.
12.4.2 Installing the mechanical seal
Personnel qualification: o Fitter
Personal protective equipment: o Work clothing
o Protective gloves
o Safety boots
Aids: o Tool set mechanical seal or radial shaft seal Ä Spare
parts,Page56
o Silicone grease
18
1
19
B
1. Ensure that all parts of the mechanical seal are dismantled so that the supporting ring18 with
circlip19 is visible on the shaft of the main screw1.
2. Clean the main screw around the mechanical seal carefully and grease it, and push the mounting
sleeve main screwB onto the main screw.
16B 12B
171
1
18
19
18
19
20
20
3. Mechanical seal standard/with throttle ring/with quench (figure left):
Press the supporting ring20 and rotary seal ring16onto the main screw until it stops.
-or-
Mechanical seal hard material (figure right):
Loosen the fixing screws17 of the mechanical seal (quantity depends on the size). Slide the sup-
porting ring20 and rotary seal ring onto the main screw until it stops and retighten the fixing
screws.
4. Attention: When pressing the components into the seal housing/seal flange ensure that the ad-
apter sleeve21/threaded pin22 is not damaged. Take the recess into account.
1212 103
A
21 22
A
Mechanical seal standard/hard material
Size15–660, 880 (figure left)/Size851, 951–3550 (figure right):
Use the mounting arbour stationary seal ringA to press the stationary seal ring12 with mounted
O-ring into the seal housing3/seal flange10.
-or-
34
OIC 18en-GB Edition 2020-01
Operating instructions