Richter RG5 - Manual (Page 3)

Series SCK mechanical seal RG-5, stationary, double, Page 3
with quench or pressurized
9220-065-en Revision 10
TM 7827 Edition 03/2010
2 Safety, transport and storage
The relevant sections in the adjacent installation and
operating manuals apply to safety, transport and
storage.
This installation and operating manual is only valid in
conjunction with the installation and operating
manuals of
SCK long-life grease and oil bath lubrication
9220-050-en
2.1 Intended use
Double mechanical seals for plastic-lined pumps of
the series SCK are suitable for the use of aggressive,
toxic, pure and inflammable media.
The instructions contained in the operating
manual or contractual documentation are to be
observed, if necessary consult the manufacturer.
All the important features are documented in the data
sheet included in the scope of delivery.
3 Product description
For a product description of the pump, see the
installation and operating manual for the SCK series.
The sectional drawing shows a stationary, double
mechanical seal RG-5, with quench or liquid sealed.
See Section 7 All components which come into contact with the
process medium are either lined with plastic or are
made of other resistant materials, e.g. silicon carbide.
4 Commissioning / Shutdown
4.1 Initial commissioning
See installation and operating manual for the series
SCK.
4.2 Mechanical seals
The design and material combination are specified in
the data sheet.
The proper condition of the components and
the protective facilities must be ensured to
prevent any risk from escaping medium.
The regulations and recommendations of the
mechanical seal manufacturer must always be
observed.
4.2.1 Use in an explosive area
Use in an explosive area means that only
mechanical seals may be employed which
permit observation of temperature.
The operating manual of the respective mechanical
seal manufacturer is an integral part of this general
operating manual.
This permits, amongst other things, the calculation of
the expected surface temperature at the mechanical
seal. The suitability for the permissible temperature
class as per ATEX is hereby given.
CAUTION:
The permissible temperature class of the complete
unit (pump, mechanical seal, coupling, motor) is
determined by the lowest temperature class of the
individual components.
Example: Pump T4, mechanical seal T3,
coupling T4, motor T4
In both cases the unit may only be used in
atmospheres which may ignite above the temperature
class T3, i.e. >200 °C (>392°F).
4.2.2 Mechanical Seal RG-5, with quench
The design and material combination are specified in
the data sheet.
A pump with a stationary mechanical seal with
quench may only be started up when the quench
system is in operation and the pump is filled with
process medium.
The pressure of the quench fluid must be max. 1 bar.
The admissible pressure for the storage container
must also be observed.
If process water is used for quenching, a flow rate of
approx. 40 l/h should be set. After a running-in phase
of approx. 10 h the flow rate can be reduced so that
the quench fluid emerges heated by about 20°C. A
minimum flow rate of 5 l/h should be maintained.
Are the available connections correctly made?
QE - quench fluid inlet
QA - quench fluid outlet
See also sectional drawing in Section 7.