Richter MNKA Series (ASME) User Manual download pdf (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)).

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Richter MNKA Series (ASME) User Manual Page 10

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