Series SCK, Size 25-25-100
Page 5
9220-003-en
Revision 14
TM 10272
Edition 01/2021
2
Notes on safety
This
operating
manual
contains
fundamental
information which is to be observed during installation,
operation and maintenance.
It must be read before installation and commis-
sioning!
This operating manual must always be available at the
place of use of the machine/plant.
In addition to the general notes on safety under the
main heading “Safety”, special notes on safety are
included at other points and must be observed.
Installation, operation and maintenance are to be per-
formed by qualified staff.
The area of responsibility, authority and supervision of
the staff must be exactly regulated by the customer.
If the staff do not have the necessary expertise, they
are to be trained and instructed. If necessary, this can
be provided by the manufacturer/supplier on behalf of
the machine operator.
General hazard symbol!
People may be
put at risk.
Safety symbol!
The pump and its function
may be put at risk if this safety symbol is
not observed.
EU
marking!
Explosion-protected
equipment must be identified for work in
potentially explosive areas.
Warning of electric power!
It is imperative to observe signs attached directly to
the pump / unit, e.g.:
Direction of rotation arrow
Warning against dry-running
and they are to be kept legible.
Non-observance of the notes on safety may result
in the loss of any and all claims for damages.
Non-observance may involve the following hazards :
Failure of important functions of the machine/plant.
Risk to people from electric, mechanical and chemical
effects.
Risks to the environment through leaks of hazardous
substances.
If the unit is used in potentially explosive
areas, special attention is to be paid to the
sections identified with “Ex” in this operating
manual.
2.1 Intended use
Richter pumps of the series SCK are plastic-lined cen-
trifugal pumps for the leak-free conveyance of ag-
gressive, toxic, pure and inflammable liquids.
Vertical installation of the pumps is only possible with
pumps with grease-lubricated rolling bearings or roll-
ing bearings with oil mist lubrication. Please consult
the manufacturer.
The observance of the specified physical
limits is important for perfect functioning and
safe operation, especially with regard to ex-
plosion protection to prevent potential
sources of ignition (see
Section 2.6
):
It must be ensured that the pump is always filled with
liquid during operation.
For safe pump operation, we recommend a flow rate
which lies between 0.3 and 1.1 Q
opt
. The maximum
operating temperature must never be exceeded.
See
Section 2.6.7
. In case of doubt, you must
consult the manufacturer.
The manufacturer must be consulted in the event of
entrainment of gas >2% as well as solids in order
to avoid a lack of lubrication and dry-running.
The plant NPSH value (NPSHA) should be 0.5 m
higher than the NPSH value of the pump
(NPSHR). See also
Section 5.4.1
.
Improper operation, even for brief periods,
may result in serious damage to the unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and in-
duced 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.
Furthermore, reference is made in this connection to
the Directive
1999/92/EG („ATEX 137“)
which con-
tains the minimum regulations for improving the occu-
pational health and safety of the workers who may be
at risk from an explosive atmosphere.
This unit must not be operated above the
values specified in the data sheet as regards
the fluid to be conveyed, flow rate, speed,
density, delivery head and operating temper-
ature as well as the motor rating.
The operating manual of the mechanical seal manu-
facturer in particular must be examined with regard to
the maximum medium temperature limit and a com-
parison be made with the medium temperature limits
indicated in the table in
Section 2.6.7
.
Observe the instructions contained in the operat-
ing manual or contractual documentation; if nec-
essary, consult the manufacturer.
All important features are documented in the data
sheet included in the scope of delivery.
