Series MNK-B,
size 25-25-100
Page 17
9230-056-en
Revision 14
TM 9542
Edition 06/2016
7.8.4 Determine thicknesses S
1
and S
2
of
the distance washers 551
Fig. 5
The distances X and Z are given in the works
certificate.
X
: Distance behind the impeller
Z
: Axial clearance of the plain bearings
Press inner magnet assembly in the direction of
the impeller.
Measure distance X
1
behind the impeller.
Press impeller in the direction of the motor.
Measure distance X
2
behind the impeller.
Thickness of the distance washer on the inner magnet
assembly side: S
1
= X
1
- X
Thickness of the distance washer on the impeller side:
S
2
= X - X
2
- Z
Example
Figures in the works certificate (mm) :
X
= 2.0
Z
= 0.4
Measurements during trial assembly : X
1
= 2.5
X
2
= 1.3
S
1
= X
1
– X
= 2.5 - 2.0
=
0.5 mm
S
2
= X - X
2
– Z = 2.0 - 1.3 - 0.4 = 0.3 mm
Dismantling of impeller and bearing bushes.
7.8.5 Final assembly
Final assembly of impeller
230
, bearing bushes
245/1
,
245/2
and distance washers
551/1
,
551/2
.
Assembly with the back plate
161
.
Insert the back plate with the impeller
230
into the
lantern
344
.
Insert intermediate ring
509/1
into the lantern
344
.
Insert housing gasket
401
.
Screw housing
100
to slide-in unit.
The works certificate also indicates the distance Y.
Y : Distance in front of the impeller
This distance can be influenced by the thickness of
the housing gasket.
When tightening the housing screws, observe the
tightening torques in
Section1.1
.
After tightening the housing screws
901/3
,
554/9
the support screws (
901/6, 554/6
) in the support
bracket of the lantern
344
are to be brought into
contact and counter-checked with the nuts
920/2
.
7.9 Tests
The
pumps
are
tested
with
water
at
the
manufacturer's.
The operating data measured are documented in a
works certificate
.
If, during a test after repairs, discrepancies compared
with the works certificate are discovered, the following
people can be called in :
1) in-house pump office
2) The manufacturer Richter
or its local agent
The following conveying data can be checked using
the
pump performance curves
:
Flow rate
Head
Power requirement
NPSHR
9299-00-5058.4-00.1
X
S
S
Z
1
2
