Richter MNK Series - Manual (Page 10)

Series MNK 200-150-315
Page 10
9230-053-en Revision 12
TM 8195 Edition 03/2011
4 Product description
The housing dimensions, nominal ratings and
technical requirements of the pump series MNK 200-
150-315 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 10.1.
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 and axial bearing 314 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 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.
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
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.