KSB CTN - Fitting the Shaft Seal

7 Servicing/Maintenance
52 of 76
CTN / CTN-H
7.5.5 Fitting the shaft seal
7.5.5.1 Installing the mechanical seal
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 contact faces immediately before
installation takes place.
▪ Prevent any damage to the sealing surfaces or O-rings.
▪ After inserting the stationary ring of the mechanical seal, 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48) to
(ðSection7.5.4,Page51) have been observed/carried out.
ü All dismantled 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ü Any damaged or worn parts have been replaced by original spare parts.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. Fit the rotating assembly of the mechanical seal onto the shaft protecting
sleeve.
2. Slide the shaft protecting sleeve with O-ring 412.32 (if applicable) and pre-
assembled mechanical seal unit onto the shaft.
Make sure that anti-rotational device 562.06 is assembled in the shaft.
3. Carefully press the stationary mating ring of mechanical seal 433 with O-ring
into seal cover 471.01.
4. Screw seal cover 471.01 with the pre-assembled mechanical seal unit to stuffing
box housing 451.02. using bolts 902.09 and nuts 920.09.
5. Attach adjusting ring 500.12 to the shaft protecting sleeve with grub screw
904.32.
CAUTION
Fastening the adjusting ring to the shaft
Damage to the mechanical seal!
▷ Secure the adjusting ring to the shaft with grub screw after setting the axial
impeller clearance. (ðSection7.5.6,Page55) and
(ðSection7.5.7,Page57)