Product code Pressure class Open or closed impeller
2201.691 MT, HT Open
1. Prepare the shaft:
a) Polish off any flaws with a fine emery cloth.
The end of the shaft must be clean and free from burrs.
b) Clean and grease all sealing surfaces and O-rings.
Do not use molybdenum disulphide (MoS
2
).
c) Grease the end of the shaft and the impeller hub.
d) Insert the key in the keyway of the shaft.
e) Fit an appropriate number of adjusting washers on the shaft.
2. Check that the driving pin on the outer seal aligns with the key.
3. Without turning the shaft in relation to the driving ring, push the impeller carefully so
that the pin fits into the impeller keyway.
4. Fit the washer and the nut.
5. Tighten the impeller nut.
Tightening torque: 200 Nm (150 ft-lb)
6. Secure with washer.
7. Check that the impeller can rotate freely.
6.4.6 Install the impeller, alternative 2
Table 8: Applicability
Product code Pressure class Open or closed impeller
2190.010 HT Closed
2201.012 HT Closed
1. Prepare the shaft:
a) Polish off any flaws with a fine emery cloth.
6 Maintenance
Flygt 2190, 2201 Installation, Operation, and Maintenance Manual 41
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