Series MNK pedestal group 4
Page
10
9230-003-en
Revision 19
TM 10458
Edition 06/2022
4
Product description
The housing dimensions, nominal ratings and technical
requirements of the pump series MNK 200-150-315
and 125-100-315 correspond to ISO 2858
1)
/ DIN EN
22858 / ISO 15783 / DIN ISO 5199. The technical re-
quirements of the VDMA 24279 are satisfied.
The sectional drawing shows the design of the pump.
See
Section 10.1
.
All components which come into contact with the me-
dium are either plastic-lined or made of other resistant
materials, e.g. silicon carbide.
The housing
100
consists of a metallic shell with a plas-
tic lining.
The bearing bushes
545
and axial bearing
314
are se-
cured against turning in the plain bearing pedestal.
The bearing sleeves
529/1
are in the impeller, resp.
529/2
in the inner magnet assembly secured against
turning.
The can
159
is made of CFK (high-resistance, carbon
fibre composite material). It is protected against the
medium by a can insert
158
made of resistant plastic.
_____________________
1)
For MNK 125-100-315, the dimensions f, w, and d deviate
from the standard.
The plain bearing pedestal 339 separates the hydraulic
section of the pump from the can area. Both chambers
are connected by flushing bores in the plain bearing
pedestal so that an internal flushing circuit is formed
owing to the pressure differences. This circuit serves to
flush and cool the plain bearings.
Only oil bath lubrication:
The bearing pedestal
330
contains radial ball bearings
321/1, 321/2,
which are lubricated by an oil bath. This
oil bath is sealed by means of the shaft seals
421/1
,
421/2
and the o-ring
412/1.
Special designs:
♦
A vacuum-proof can unit is produced by gluing the
can to the can insert.
The can chamber is also vented and evacuated
through the bores in the plain bearing pedestal.
Additional information is provided in the brochure.
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 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.
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 cou-
pling 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 deviation max. 0.2 mm/m).
♦
A distance depending on the coupling used is to be
observed between the pump and motor shafts. See
installation drawing.
♦
Use supports in the direct vicinity of the bolts foun-
dation/base plate.
Ensure that the unit cannot be started
during work without the coupling guard.
