Richter RMA Series, Installation And Operating Manual

Page: 10 / 36

Series RMA-B
close-coupled design
Page 10
9450-055-en Revision 01
TM 9886 Edition 11/2018
4 Product description
The housing dimensions, nominal ratings and
technical requirements of the pump series RMA-B
correspond to ASME B73.1, ASME B73.3, ISO 15783,
ISO 5199. The technical requirements of the VDMA
24279 are satisfied.
The sectional drawing shows the design of the pump.
See
Chapter 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
100
consists of a metallic shell with a
plastic lining.
The shaft spider
338
is pressed into the housing and
secured with the anti-torsion inserts 566/1 .
The two bearing bushes 545 are pressed in from the
bearing pedestal side and secured with the anti-
torsion insert 566/2 .
The distance ring 504 is inserted in-between.
The can 159 is made of CFK (high-resistance, carbon
fibre composite material). It is protected against the
corrosive medium by a can insert
158
made of
resistant plastic.
The thrust ring
510/3
is pressed in and has a positive
connection with the shaft 222 to prevent it from
turning. The shaft 222 is mounted with a positive
connection in the can insert 158 .
The impeller 230 and the inner magnet assembly 859
can be separated and can therefore be replaced
independently of each other. Both components have a
positive connection for power transmission.
The static tightness of the pump is guaranteed by
the screw fittings of the bracket 344 and housing
100 . The bearing pedestal gasket 401 and the lips of
the can unit are jammed between both components
with the required sealing force.
In NEMA motors, the torque is transmitted to the
drive rotor via the dowel pins engaging the motor
shaft groove.
For ISO motors, the torque is transmitted from the
motor shaft to the drive rotor via the key.
This is secured axially on the motor shaft with two
threaded pins 904/1 .
In the event of a leak in the can unit, the closed
lantern construction offers additional time-limited
protection against the medium leaking into the
atmosphere.
The flushing flow is guided on the outside past the
impeller assembly into the can. The flushing flow
returns to the housing through flushing bores in the
impeller assembly and through the plain bearings.
Further design details are provided in the enclosed
drawing. Additional information are provided in the
brochure and the product manual.