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Fig. 13: Checking the radial alignment with a
comparator
Fig. 14: Checking the radial alignment with a
ruler
Fig. 15: Checking the axial alignment with a
calliper gauge
Fig. 16: Checking the axial alignment with a
calliper gauge – circumferential check
22
Coupling size
ΔS
and ΔKr
perm.
1500 rpm
180
0.30
200
0.30
Permissible shaft displacement ΔS
Table 6: Maximum permissible shaft displacement ΔS
Checking the radial alignment
•
Firmly clamp a dial gauge to one of the couplings or to the shaft. The piston of the dial
gauge must lie against the crown of the other half-coupling.
•
Set the dial gauge to zero.
•
Turn the coupling and write down the measuring result after every quarter turn.
•
Alternatively, the radial coupling alignment can also be checked with a ruler.
NOTICE
The radial deviation of the two coupling halves must not exceed the maxi-
mum values found in table "Maximum permissible shaft displacement
ΔS
and ΔKr
perm.
including operating temperature and inlet pressure.
Checking the axial alignment
NOTICE
The axial deviation of the two coupling halves must not exceed the maxi-
mum values found in table "Permissible gaps S and S2". This requirement
applies to every operating status – including operating temperature and
inlet pressure.
Using a calliper gauge, circumferentially check the distance between the two coupling
halves.
Installation and operating instructions • Wilo-Atmos GIGA-NHT • Ed.01/2023-10
[mm]; speed dependent
perm.
1800 rpm
3000 rpm
0.25
0.20
0.30
0.20
and ΔKr
in mm (during operation, rounded)
perm.
perm.
and ΔKr
perm.
". This requirement applies to every operating status –
perm.
3600 rpm
0.20
0.20
perm.
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