KSB 4K Series, Installation & Operating Manual

5 Installation/Dismantling

15 of 32

4K / 4KD

5.3 Installing the mechanical seal

The rules of sound engineering practice and the pump manufacturer's general
provisions apply. Tidiness and cleanliness are essential for proper execution of the
installation work.

For dismantling and reassembly observe the general assembly drawing.

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 Section 9.1, Page 23)

CAUTION

Use of grease or other permanent lubricants

Torque transmission impeded / overheating of and damage to the pump!

▷

Never use grease or other permanent lubricants for fitting the torque-
transmitting elements of a mechanical seal.

▷

Use soft soap to reduce any friction caused during assembly.

▷

Never coat the mechanical seal faces with grease or oil.

Example of an installation sequence for KSB pumps

ü

The operating manual for the pump is on hand.

ü

The pump and/or machinery has been prepared in accordance with the
manufacturer's instructions for installing the mechanical seal.

ü

Any corrosion or wear has been removed.

ü

The mechanical seal and assembly aids are on hand.

ü

The installation of the mechanical seal is carried out in accordance with the
installation drawing.

ü

The back pull-out unit of the pump has been placed in a clean and level assembly
area.

ü

The original mechanical seal is fully assembled and undamaged.

1.

Clean the seal faces with a suitable paper tissue and ethyl alcohol.

2.

Insert thrust ring 474.51 into the turned recess on the rear side of casing cover
161.

3.

Slide springs 477.51 onto hexagon socket head cap screws 914.

4.

Thread hexagon socket head cap screws 914 with fitted springs 477.51 through
the holes in thrust ring 474.51 and fasten them inside casing cover 161.

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 Section 5.5, Page 18) 

Important: When tightening the screws, make sure not to block the axial
movement of thrust ring 474.51. Make sure that it can move freely.

CAUTION

Contact of O-ring with lubricant made of mineral grease or oil

Damage to the O-ring!

▷

Make sure that O-rings made of ethylene propylene rubber cannot come into
contact with mineral oil or mineral grease.

▷

Make sure that O-rings made of silicone rubber cannot come into contact with
silicone oil or silicone grease.

5.

Apply a suitable lubricant to O-ring 412.51 and the groove in the casing cover.

6.

Insert O-ring 412.51 into the groove provided in the casing cover.

7.

Carefully install primary ring 472.51.

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The protruding tags of thrust ring 474.51 must engage in the grooves of
primary ring 472.51. Important: Make sure that thrust ring 474.51 can still
move freely.

8.

Completely mount casing cover 161 with the joint ring on the bearing bracket
lantern.

9.

Tighten the hexagon head bolts.

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 Section 5.5, Page 18)