Richter MNKA Series (ASME) - Manual (Page 10)

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)).