Series MNKA,
acc. to ASME
Page 10
9250-050-en
Revision 11
TM 7903
Edition 07/2010
4
Product description
The housing (casing) dimensions, nominal ratings and
technical requirements of the pump series MNKA
correspond to ASME B73.3M, ISO 15783 / DIN ISO
5199.
The
sectional drawing
shows the design of the
pump. See
Section 9
.
All components which come into contact with the
medium are either plastic-lined or made of other
resistant materials, e.g. silicon carbide.
The housing (casing)
100
consists of a metallic shell
with a plastic lining.
The bearing bushes
545
are secured against turning
in the plain bearing pedestal
339
. The bearing sleeves
529/1
are secured against turning in the impeller
230
or the bearing sleeves
529/1
in the inner magnet
assembly
859
.
The distance ring
504
prevents the two bearing
sleeves
529
from rubbing together during assembly.
Only oil bath lubrication
The bearing pedestal
330
contains radial ball bearings
321
which are lubricated by an oil bath.
The oil bath is sealed against the atmosphere by two
rotary shaft seals
421/1
and
421/2
and the cover
gasket
403.
The can (containment shell)
159
is made of high-
resistance, carbon fibre composite material. It is
protected against the medium by a can (containment
shell) insert
158
made of resistant plastic.
Special designs :
A
vacuum-proof can (containment shell) unit
is
produced by gluing the can (containment shell) to
the can (containment shell) insert.
The
flushing flow
flows through the bores in the plain
bearing pedestal
339
into the can (containment shell)
chamber.
From there it is returned into the housing (casing)
through the plain bearings.
The can (containment shell) chamber is also
vented
and
evacuated
through
the bores in the plain bearing
pedestal
339
.
Additional information is provided in the
brochure
and
the
Product manual
.
5
Installation
5.1 Safety regulations
Equipment which is operated in potentially
explosive areas must satisfy the explosion
protection regulations.
People with a pacemaker are at risk from the
strong magnetic field of the magnetic drive. It
may be life-threatening for them to stay at a
distance of less than 20” (500 mm) to the pump.
5.2 Installation of pump/unit
The structural work must be prepared in accordance
with the dimensions in the installation drawing.
Method of installation: on a grouted base plate and
firm foundation
Align base plate on the ground foundation.
Insert foundation bolts and grout base plate.
Do not tighten the foundation bolts uniformly and
firmly until the mortar has set.
Other possibilities of installing the pump are:
4-point installation
4-point installation with base plate.
As soon as additional installations are
mounted, the stability of the entire unit
installed without a foundation must be
checked.
5.3 Alignment of pump-coupling-
motor
The following information is of a general
nature. If necessary, special notes of the
coupling and motor manufacturer are to be
observed.
After attachment of the base plate on the
foundation and connection of the pipes, the
alignment of the coupling must be carefully
checked and, if necessary, the unit re-aligned with the
motor.
A coupling check and possible re-alignment is also
necessary if the pump and motor are supplied on a
common base plate and aligned.
Prior to alignment undo the support bracket
183
and then tighten it without stress.
The pump is to be aligned in all directions using a
spirit level (on shaft/discharge nozzle) (admissible
position max. 0,008”/ft (0.2 mm/m)).
