Richter MPB 25-25-115 - Manual (Page 5)

Series MPB, close-coupled design Page 5
9240-050-en Revision 05
TM 7345 Edition 10/2008
Risk to people and their personal property from
magnetic fields.
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 MPB are plastic-lined
peripheral pumps for the leak-free conveyance of
aggressive, toxic, pure and inflammable liquids. These
liquids must not contain any solids.
Gas contents of up to 30% may be entrained. If gas is
entrained in an explosive area, it must be ensured that
no explosive atmosphere enters the pump as a result
of the gas conveyed.
The pump is equipped with a permanent magnetic
synchronous drive.
The observance of the specified physical
limits is important for perfect functioning and
safe operation, especially with regard to
explosion 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 >5% in order to avoid a lack
of lubrication and dry-running. If gas is entrained in
an explosive area, it must be ensured that no
explosive atmosphere enters the pump as a result
of the gas conveyed.
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.
Owing to its design the pump can draw in media
on its own within certain operating limits.
It is imperative for the pump to be filled completely
prior to self-priming.
For self-priming in or out of an explosive area it
must be ensured that no potentially explosive
atmosphere can form.
This can be achieved by superimposing the plant
with an inert gas (e.g. nitrogen).
The medium must not exceed the medium
temperature shown in the table in Section 2.6.7
nor its boiling temperature. This can, for example,
be ensured by a temperature monitor.
Improper operation, even for a short period,
may result in serious damage to the unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks) may
result from these improper operation; their occurrence
can only be prevented by adhering to the intended
use.
Furthermore, reference is made in this connection to
the Directive 95/C332/06 (ATEX 118a) which contains
the minimum regulations for improving the
occupational 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 temperature as
well as the motor rating.
The instructions contained in the operating
manual or contract documentation must be
observed; if necessary consult the manufacturer.
All important features are documented in the data
sheet included in the scope of delivery.
In the event of operating conditions other than those
described in the data sheet, the following are to be
checked again:
design of the pump
design of the accessories
resistance of the materials.
2.2 For the customer/operator
The following must be observed:
The notes on safety contained in this operating
manual,
the prevailing regulations on accident prevention,
in-house work, operating and safety regulations of
the customer.
Hot or cold machine parts must be protected by
the customer against being touched.
No protective facilities may be removed when the
machine is in operation.
The ring bolt 900/1 must not be removed or
loosened as deposits could form between
the drive magnet assembly and the lantern.
For example, overheating and thus potential
sources of ignition could arise due to frictional
energy.
Hazards due to electricity are to be excluded.
Leaks of hazardous media (e.g. explosive, toxic,
hot) must be removed so that no risk arises for
people and the environment. The statutory
provisions are to be observed.
Caution when using the units in potentially
explosive area! Improper operation must be
prevented.