Richter MNK-B Series - Manual (Page 10)

Series MNK-B, close-coupled design Page 10
9230-055-en Revision 09
TM 7345 Edition 10/2008
4 Product description
The housing dimensions, nominal ratings and
technical requirements of the pump series MNK-B
correspond to ISO 2858 / DIN EN 22858 / ISO 15783 /
DIN ISO 5199. The technical requirements of the
VDMA 24279 are satisfied.
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 100 consists of a metallic shell with a
plastic lining.
The bearing bushes 545 are secured against turning
in the plain bearing pedestal.
The bearing sleeves 529 are secured against turning
in the impeller or in the inner magnet assembly.
Bearing sleeve old design: can be used on inner
magnet assembly and impeller side.
Bearing sleeve new design from 2006: Can only be
used on the inner magnet assembly side. The
bearing sleeve 529/2 has, in addition to the previous
anti-torsion insert, an additional positive connection in
the shape of a "lemon". As a result, an increase in the transmissible torque is
achieved. The anti-torsion insert of the bearing sleeve
529/1 on the impeller side remains unchanged.
All inner magnet assemblies are provided with the
new anti-torsion insert geometry as from 2006. For
exchangeability reasons, plain bearing sleeves of the
old design can be combined with the new inner
magnet assembly.
The distance ring 504 prevents the bearing sleeves
from “moving”.
The can 159 is made of high-resistance, carbon fibre
composite material. It is protected against the medium
by a can insert 158 made of resistant plastic.
Special designs:
A vacuum-proof can unit is produced by gluing
the can to the can insert.
The flushing flow flows through the bores in the plain
bearing pedestal into the can chamber.
From there it is returned into the housing through the
plain bearings.
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.
Other possibilities of alignment are:
4-point-alignment
4-point-alignment 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 / motor
The following information is of a general
nature. If necessary, special notes of the
motor manufacturer are to be observed.
Prior to alignment work, loosen the screwing
901/6, 920/2 in the lantern. Align the unit with the
housing so that there is no tension and retighten
the screwing.
Use supports in the direct vicinity of the bolts
foundation/base plate.
5.4 Piping
Before the pump is installed, both the suction and
supply lines as well as the discharge line are to be
cleaned.
Dirt or damage to the sealing surfaces is best avoided
if the flange covers remain on the flanges until just
before installation.
Use flange gaskets suitable for the medium.
The screw tightening torques in Section 1.1 are to be
observed for tightening the flange screws.