KSB MAMMOUTH 25 User manual

Double Mechanical Seals
Back-to-back Arrangement
With Seal Supply System
Supplementary Operating
Manual

Legal information/Copyright
Supplementary Operating Manual Double Mechanical Seals
Original operating manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced,
edited or processed for any other purpose, nor otherwise transmitted, published or made available to a
third party without the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB SE & Co. KGaA, Frankenthal 19/01/2018

Contents
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Double Mechanical Seals
Contents
1 Supplementary Operating Manual....................................................................................................... 4
1.1 General..............................................................................................................................................................4
1.2 Technical data...................................................................................................................................................4
1.3 Removing the shaft seal...................................................................................................................................4
1.3.1 Removing the shaft seal - shaft units 25/35 .......................................................................................4
1.4 Installing the shaft seal ....................................................................................................................................5
1.5 Seal supply system ............................................................................................................................................6
1.5.1 Applications..........................................................................................................................................6
1.5.2 Connections..........................................................................................................................................7
1.5.3 Requirements to be met by the seal supply system...........................................................................7
1.6 General assembly drawing with list of components ......................................................................................9
1.6.1 Shaft units 25/35 ..................................................................................................................................9

1 Supplementary Operating Manual
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1 Supplementary Operating Manual
1.1 General
This supplementary operating manual accompanies the installation/operating
manual. All information contained in the installation/operating manual must be
observed.
Table1: Relevant operating manuals
Type series Reference number of the installation/operating
manual
Etaprime L 2753.81
Etaprime B 2753.82
1.2 Technical data
Design details The shaft is sealed by 2 unbalanced single bi-directional mechanical seals to EN12756
in back-to-back arrangement, with barrier fluid system.
Seal size/ material variant Table2: Material variant
Shaft unit
Mechanical seal
Outboard (433.02) Inboard (433.01)
Seal size Material variant1) Seal size Material variant
25 KU028S-M7-N Q1BVGG KU028S-M7-G49 Q1Q1K9GG-G
35 KU038S-M7-N KU038S-M7-G49
Material code Table3: Material code
Item Description Code Materials
1 Primary ring Q1 SiC, silicon carbide, sintered without
pressure
2 Mating ring B Resin-impregnated hard carbon
Q1 SiC, silicon carbide, sintered without
pressure
3 Secondary seal V Fluoroelastomer (Viton)
K9 Perfluoroelastomer
4 Spring G CrNiMo steel
5 Other
components
G CrNiMo steel
1.3 Removing the shaft seal
1.3.1 Removing the shaft seal - shaft units 25/35
üDismantle the pump as described in operating manual 2753.81 or 2753.82.
üThe back pull-out unit has been placed in a clean and level assembly area.
1. Take hexagon nut 920.95, disc 550.95 (shaft unit 25 only), safety device 930.95,
impeller 230 and discs 550.02/.04 off shaft 210.
2. Take key 940.01 out of the shaft keyway.
3. Take spacer sleeve 525 (shaft unit 35 only) off shaft 210.
4. Remove fitting 720.13/.14 and joint ring 411.13/.14.
5. Undo hexagon nut 920.02 at seal cover 471. Abut the seal cover against the
bearing bracket or motor, as applicable.
1) For units with closed thermosyphon system: material variant Q1Q1K9GG

1 Supplementary Operating Manual
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Double Mechanical Seals
6. On models with a clamped casing cover: Undo bolt 901.98 (long-coupled
design) or screw 914.22 (close-coupled design) and remove. Separate casing
cover 161 from the locating fit of bearing bracket 330 or from the locating fit of
drive lantern 341, as applicable. Pull it off shaft 210.
On models with a bolted casing cover: Undo hexagon nut 920.15. Use forcing
screws 901.31 to separate casing cover 161 from bearing bracket 330 or drive
lantern 341. Pull it off shaft 210.
7. Pull shaft sleeve 523 with the two rotating assemblies of mechanical seals
433.01/433.02 off shaft 210.
8. Remove seal cover 471 with the mating ring of outboard mechanical seal 433.02
from shaft 210.
9. Remove circlip 932.05 and the ring from casing cover 161.
10. Remove the stationary mating ring of mechanical seal 433.01 from the casing
cover.
11. Remove the stationary mating ring of mechanical seal 433.02 from seal cover
471.
12. Loosen and remove the rotating assembly of mechanical seals 433.01 and 433.02
from shaft sleeve 523.
13. Remove and dispose of gasket 400.15 (for SU25: joint ring 411.15) and gasket
400.75.
1.4 Installing the shaft seal
Installing the
mechanical seal
The following rules must be observed when installing the mechanical seal:
▪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.
Fig.1: Adjusting dimension A
Table4: Adjusting dimension
Bearing bracket Adjusting dimension A
WS25 53,5
WS35 63
üObserve / carry out the notes and steps given in operating manual 2753.81/.82.
üThe bearing assembly as well as the individual parts have been placed in a clean
and level assembly area.
üAll dismantled parts have been cleaned and checked for wear.
üAny damaged or worn parts have been replaced by original spare parts.
üThe sealing surfaces have been cleaned.
1. Clean shaft sleeve 523 and the mating ring location in casing cover 161 and seal
cover 471. Gently remove any deposits. If score marks or scratches are still
visible, replace the affected parts.