Fig. 13: Checking the coupling alignment: Coupling without spacer sleeve (a) or Coupling with spacer sleeve (b)
1 Straight-edge 2 Gauge
✓ The coupling guard and its footboard, if any, have been removed.
1. Loosen the support foot and re-tighten it without transmitting any stresses and
strains.
2. Place the straight-edge axially on both coupling halves.
3. Leave the straight-edge in this position and turn the coupling by hand.
The coupling is aligned correctly if the distances A and B to the respective shafts
are the same at all points around the circumference.
The radial and axial deviation between the two coupling halves must not
exceed 0.1 mm, during standstill as well as at operating temperature and under
inlet pressure.
4. Check the distance (dimension see general arrangement drawing) between the
two coupling halves around the circumference.
The coupling is correctly aligned if the distance between the two coupling
halves is the same at all points around the circumference.
The radial and axial deviation between the two coupling halves must not
exceed 0.1 mm, during standstill as well as at operating temperature and under
inlet pressure.
5. If alignment is correct, re-install the coupling guard and its footboard, if any.
5.7 Aligning the pump and motor
After having installed the pump set and connected the piping, check the coupling
alignment and, if required, re-align the pump set (at the motor).
5 Installation at Site
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MegaCPK
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