Richter MNK Series - Manual (Page 10)

Series MNK
Page 10
9230-050-en Revision 11
TM 7903 Edition 07/2010
4 Product description
The housing dimensions, nominal ratings and
technical requirements of the pump series MNK
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 9.2.
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 529/1 are in the impeller, resp.
529/2 in the inner magnet assembly secured against
turning.
The bearing bushing 529/2 has an additional form
closure in the “lemon shape” along with the anti-twist
device. This increases the transmissible torque.
The distance ring 504 prevents the bearing sleeves
from “moving”.
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.
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-rings 412/1, 412/5.
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 by 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 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 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
foundation/base plate.
Ensure that the unit cannot be started during
work without the coupling guard.