Richter MNKA-B Series (ASME) - Manual (Page 6)

Installation and Operating Manual
Series MNKA-B, acc. to ASME/ANSI
9250-055-en Revision 01
TM 5976 MPE/Wm Page 6 Edition 10/2004
2.1 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.
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! Inadmissible modes of
operation must be prevented.
2.2 For maintenance
In principle, work on the unit may only be performed
when it is at a standstill.
It is imperative to observe the procedure for stopping
the machine described in this operating manual. See
Section 6.3.
Pumps which convey media which are a health
hazard must be decontaminated.
All safety and protective facilities must be remounted
or enabled immediately after the end of work.
In the assemble state, if the safety notes (see also
Section 5.1 and 7.5.2) are observed, the magnetic
drives do not cause any risks or have any affect on
the environment.
During dismantling and assembly as well as
during transport and storage of the magnetic
drives as single components, the notes on
safety in Section 7.5.2 must be observed.
The points listed in Section 6.1 must be followed
before recommissioning.
2.3 Conversion work and
production of spare parts by
the customer
Conversion of or changes to the machine are only
admissible after consultation with the manufacturer.
Original spare parts and accessories authorised by
the manufacturer serve to enhance safety.
The use of other parts may annul the liability for any
resultant consequences.
2.4 Inadmissible modes of
operation
The operational safety of the machine supplied is only
guaranteed if it is used properly in accordance with
Section 1.1 of this operating manual.
The operating limits specified in the data sheet must
under no circumstances be exceeded.
2.5 Explosion protection
If the units are used in potentially explosive areas, the
measures and notes in Sections 2.5.1 to 2.5.9 are
imperative to guarantee the explosion protection.
2.5.1 Filling the unit
During pump operation the wetted interior of
the pump must always be filled with the fluid.
This prevents any explosive atmosphere and
the risk of dry-running.
If the customer cannot ensure this, we
recommend that appropriate monitoring
facilities be provided.
All auxiliary, heating and cooling systems
must also be carefully filled.
2.5.2 Special operating conditions
In the standard design the can chamber and
the plain bearings are cooled and lubricated
by a flushing flow.
The cooling flow may be interrupted and an
inadmissible rise in temperature may occur due to
properties of the liquid (e.g. sticking, possibly by an
inadmissible ingress of solids, clogging, ingress of gas
etc.). Appropriate monitoring facilities are to be
provided. See Section 5.6.
For safe pump operation, we recommend a flow rate
of 0.3 to 1.1 Q
opt
. If the pump is operated outside this
range, it must be ensured that the max. admissible
flow rate according to the pump characteristic curve is
not exceeded and that the max. admissible operating
temperature according to Section 2.5.7 is observed.
If the flow rate is too high, the differential pressure
upstream and downstream of the plain bearings could
fall so much that a lack of lubrication or dry-running
may occur.
If the flow rate is too low, the medium may heat up so
much owing to the fluid friction that the max.
admissible surface temperature of the relevant
temperature class is exceeded.