Series RMI-B
close-coupled design
Page
10
9430-005-en
Revision 03
TM 10456
Edition 06/2022
4
Product description
The housing dimensions, nominal ratings and technical
requirements of the pump series RMI-B correspond to
ISO 2858 / DIN EN 22858 / DIN EN ISO 15783 / DIN
EN ISO 5199. The technical requirements of the VDMA
24279 are satisfied
The sectional drawing shows the design of the pump.
See
Section 9.2
.
All components which come into contact with the me-
dium are either plastic-lined or made of other resistant
materials, e.g. silicon carbide.
The housing
100
consists of a metallic shell with a plas-
tic 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
504/1
is inserted in-between.
The can
159
is made of high-resistance CFK (carbon
fibre composite material). It is protected against the
corrosive medium by a can insert
158
made of PTFE.
The thrust ring
510/3
is pressed in and locked with the
shaft
222
in a form-locking manner against twisting.
The shaft
222
is positively mounted in the can insert
158
.
The impeller
230
and the inner magnet assembly
859
are separable and thus can be exchanged inde-
pendently of one another. Both components are posi-
tively connected to one another for force transmission.
The static tightness of the pump is guaranteed by the
screw fittings of the bracket
344
and housing
100
. The
sealing collar of the wear ring seal
502/1
and the rims
of the can unit are clamped between the two compo-
nents with the required sealing force.
The torque is transmitted from the motor shaft through
whose key to the drive magnet assembly
858
.
This is secured axially on the motor shaft with two set-
screws
904/1
. The magnets are glued in the drive
magnet assembly.
In the case of a leakage of the can unit, the closed
lamella construction provides a temporary additional
protection
against
media
leakage
into
the
atmosphere.
The flushing flow is guided on the outside past the im-
peller 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.
