Series SCK mechanical seal RG-5, stationary, double, Page 5
with quench or pressurized
9220-065-en Revision 10
TM 7827 Edition 03/2010
5.3 Dismantling of a stationary,
double mechanical seal RG-5
Dismantling can be checked using the sectional
d
rawings in Section 7 a
nd
Section 9 o
f the
installation and operating manual SCK as well as the
components available.
5.3.1 Dismantling of back plate, impeller
and RG-5
Loosen assembly gauges 694/1, push into the
groove and tighten again with the hex. screw
901/8.
Undo hex. nut 920/6 with washers 554/6 of the
bearing pedestal / back plate.
Undo back plate (for instructions, see Sections
4.2.1 and 7.7.4 in the installation and operating
manual SCK).
Move the back plate almost up to the impeller with
light hammer blows.
Unscrew the impeller 230 completely.
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! Press the
back plate off in the direction of the impeller as
well.
For assembly aid for impeller, see Section 10.1 in
the installation and operating manual SCK.
Undo nuts 920/6 and pull out RG-5 completely.
5.4 Notes on assembly
Only use original spare parts.
Do not use any defective parts.
The recommendations of the mechanical seal
manufacturer are to be observed.
Bearing pedestal group 3:
Always make sure that when installing the
mechanical seal the labyrinth disc is secured by 2
bolts.
The bolts must be removed again after assembly
of the impeller.
Undo assembly gauge 694/1 after tightening the
impeller, pull out of the groove and secure again
with the hex. screw
901/8.
6 Faults
Faults may result from inadmissible modes of
operation. Such inadmissible modes of operation –
even brief ones – may cause serious damage to the
unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks) can
result from these inadmissible modes of operation;
their occurrence can only be prevented by adhering to
the intended use. See also
Section 2.1.
Should there be any uncertainty about the remedy to
be applied, please inquire at the in-house pump office
or at the pump manufacturer's.
See also
Section 8 in the installation and operating
manual of the SCK series.
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