Richter RSI Series - Manual (Page 5)

Series RSA , Mechanical Seals, external, single or Page 5
double, type Crane 58U – 58U
9485-060-en Revision 11
TM 8046 Edition 10/2010
5 Maintenance
The regulations of the mechanical seal
manufacturer must always be observed.
See also the installation and operating manual
for the RSA or RSI series.
5.1 External, single mechanical
seal
In normal operations this seal should not drip. The
leak should only be so minimal that it evaporates
immediately.
It is advisable to check the attachment screws of the
mating ring adapter 487 and of the rotating unit 470/2
for a tight fit from time to time.
The wear on the rotary ring can be readily seen by the
increased size of the set dimension in many makes.
See Fig. 1.
The external mechanical seals are to be replaced
before the wear on the rotary ring become so great
that the pressing forces are no longer sufficient
as a result major leaks occur.
Often marks on the mechanical seal indicate the
admissible wear.
Fig. 1
Dismantling can be checked using the sectional
drawings in Section 7.3 and Section 9 of the
installation and operating manual RSA or RSI as well
as the components available.
.
5.1.1 Dismantling
CAUTION: Make sure that the protective
shaft sleeve 524 remains on the shaft 210
and does not fall down (risk of breakage)
Deposit bracket 344 with the plastic side facing
downwards on a soft surface.
Pull the protective shaft sleeve 524 with the
rotating unit 470/1 off the shaft 210. The
replaceable shaft sleeves 523/2 and 523/3 are
normally removed as well.
Remove the seal guard 685 on one or both sides,
depending on requirements, by undoing the hex.
socket screws 914/1.
Undo the clamp connection of the single
mechanical seal and pull the rotating unit off the
protective shaft sleeve 524.
Undo hex. screws 901/4 and remove mating ring
adapter 487 with intermediate ring 509/1.
Push mating ring 475/1 out of the bracket.
When changing the rotating unit 470/1, observe
the operating manual of the mechanical seal
manufacturer.
5.1.2 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.
External single mechanical seals can be best set
to the required pre-tension with a clamping device
which is available from Richter. See Section 10.4.
Assembly aids, in the Installation and Operating
Manual RSA or RSI.
Prepare rotating unit (observe setting dimension,
see fig. 1) and tighten on the protective shaft
sleeve.