Richter Mechanical Seals - Manual (Page 7)

Series SCK, mechanical seal, external, single Page 7
single with double lip seal on the wetted side
single with lip seal on the atmosphere side, with quench
9220-060-en Revision 10
TM 7827
Edition 03/2010
5.2.2 Assembly
Observe notes in Section 5.1.2.
Secure mating ring 475/1, intermediate ring 509/2,
support ring 506 and mating ring adapter 487 on
the back plate 161 with the stud screw 902/3,
washer 554/3 and hex. nut 920/3. For sequence
for back plate, see Sections 4.2 and 7.7.4 in the
installation and operating manual SCK.
Insert assembly cone (see Section 10.3 Assembly
aids in the installation and operating manual SCK)
into the shaft sleeve and pull the lip seal 413 with
the pre-mounted back plate over the cone.
Remove assembly cone.
Push entire unit over the shaft 210.
5.3 Single mechanical seal with lip
seal and quench
Dismantling can be checked using the sectional
drawings in Section 7.4 and Section 9 in the
installation and operating manual SCK, also the
available components.
5.3.1 Dismantling
Undo hex. nuts from the screw-in pipe connectors
917/1
and 917/2 and remove pipe.
Undo screw fitting 901/6, 554/6 from the bearing
pedestal 330 / back plate 161.
For design, see Sections 4.2.1 and 7.7.4 in the
installation and operating manual SCK.
Move back plate almost up to the impeller with light
hammer blows (plastic hammer).
Bearing pedestal group 3:
Labyrinth disc 555 must be secured with two bolts
prior to the dismantling of the impeller.
For this purpose there are 2 bores Ø5mm
in the bearing pedestal. The double
mechanical seal is relieved of pressure as a result.
See dismantling in Sections 7.7.1 and 7.7.5 in the
installation and operating manual SCK.
Undo impeller 230 with a strap wrench or
assembly wrench. Right-hand thread.
For assembly aid for impeller, see Section 10.1 in
the installation and operating manual SCK.
See also installation and operating manual SCK,
Section 7.7.1
.
Then completely undo the impeller 230, remove
back plate 161 with mating ring 475/1 and the flat
gasket 400/3.
Remove mating ring adapter 487 with flat gasket
400/6 .
Pull shaft sleeve 524 with the rotating unit 470/2
still mounted off the shaft 210.
When changing the rotating unit 470/2, observe
the operating manual of the mechanical seal
manufacturer.
Remove seal housing 483.
Undo setscrew 904/1.
Pull seal cover 471, flat gasket 400/7, distance
bush 543, lip seal 413/2 and O-ring 412/12 off the
shaft.
5.3.2 Pre-assembly
Pre-assembly without seals.
Push distance bush 543 onto the shaft.
Push the shaft sleeve 524 with the rotating unit
470/2
not attached onto the shaft.
Mount back plate 161 with the mating ring 475/1,
tighten plate screws 901/6 and 554/6.
Mount impeller 230.
Prepare rotating unit (observe setting dimension)
and tighten on the shaft sleeve.
Dismantle everything again.
5.3.3 Assembly
Observe notes in Section 5.1.2.
Perform assembly in reverse sequence to
dismantling using new seals.