Richter MNKA-B Series (ASME) - Manual (Page 14)

Installation and Operating Manual
Series MNKA-B, acc. to ASME/ANSI
9250-055-en Revision 01
TM 5976 MPE/Wm Page 14 Edition 10/2004
7.4 Stand-by pumps
If a pump is on stand-by, it is to be started up from
time to time. Regularly turn the shaft by hand in the
direction of rotation.
This operation is to be performed more often for
pumps which are exposed to very strong vibrations
from the plant.
When dismantling the pump from the plant, drain it,
thoroughly clean it, seal with flange covers and store
in accordance with the instructions.
7.5 Notes on dismantling
All repair and maintenance work is to be performed by
skilled staff using appropriate tools and original spare
parts.
Is the necessary documentation available?
Has the pump been taken out of operation, evacuated
and flushed correctly?
See also Section 6.3.
7.5.1 Protective clothing
Even if the pump has been properly
evacuated and flushed, residue of the
medium may still remain in the pump, e.g.
between sealing surfaces or in the bearing seats or in
the can (containment shell) or the can (containment
shell) insert.
Plastic components may absorb medium which
gradually emerges from the material after flushing.
Proper protective clothing is to be worn.
Protective clothing is also to be worn even if only
adapter and motor is to be removed. Medium may
have penetrated the lantern chamber through the can
(containment shell).
7.5.2 Magnetic fields
Caution ! Strong magnetic fields !
Risk during dismantling and in the vicinity of
magnetic drives as single parts.
Remove loose parts and other magnetisable metals
from the work bench. They could otherwise be
attracted: Risk of accident!
Place any tools needed at a safe distance.
Keep electronic equipment and measuring
instruments at a distance. In cases of doubt consult
the equipment manufacturer.
Hold magnetic drives as single parts firmly or secure.
Otherwise they could be attracted, for example, by a
vice: Risk of accident!
People with an artificial pacemaker:
Keep torso at a minimum distance of
20” (500 mm).
Mechanical watches as well as electronic data carriers
and digital watches or pocket calculators :
6” (150 mm) distance.
Data carriers such as credit cards, cheque cards, ID
cards with magnetic strips or magnetic tapes :
6” (150 mm) distance.
7.6 Dismantling
There are 2 possibilities for dismantling:
1. Remove the complete pump from the plant.
2. Remove the complete slide-in unit, i.e. the housing
(casing) remains in the plant.
The dismantling dimension is 3,78" (96 mm) for
group 1 and 5,12" (130 mm) for group 2.
See drawing 9220-00-3006.
Dismantling of the complete pump is described.
If the motor group 140TC is used, the adapter 346
has an integrated support bracket which has to be
detached from the base plate. With all other motor
sizes the motor is bolted to the base plate.
Undo housing (casing) screws 901/3.
Remove housing (casing) 100.
If the housing (casing) 100 remains in the plant, leave
the housing (casing) gasket 401 in the centering to
protect the housing (casing) sealing surface.
7.6.1 Removing the bearing pedestal
Caution ! Magnetic forces !
Risk of accident !
High magnetic forces can trap fingers and
personal injury.
Axial forces are produced when the bearing pedestal
330 is pulled out of the lantern 344. They diminish
again abruptly after it has been pulled out.
The torque of the magnetic drive installed is indicated
on the name plate.
Undo screws 901/4 of the lantern/adapter.
Separate adapter 346 from the lantern 344 using
the jacking screws 908/1.
Remove flat gasket 400/1.
7.6.2 Dismantling adapter and motor
Undo hex. socket screw 914/1 with toothed lock
washer 936/1 counterclockwise.
Pull off drive magnet assembly 858.
If the adapter is to be separated from the motor,
undo hex. screws 901/7.
Unscrew screw plug 903/3 out of the adapter 346.