Burkert Type 8071 - Manual (Page 18)

18
Maintenanceandtroubleshooting
Type 8071
9.5. Assemble the device
Put the magnetized rotor on the same side as the groove
(see Fig. 8 and table below).
→
Put the rotors inside the housing, at 90° (see Fig. 8).
Neutral oval rotor (without magnet)
groove
Magnetized oval rotor
Fig. 8: Position of the oval rotors
Flow rate range Magnetized oval rotor
0.5-50 l/h
hole of the magnet seat is visible (set towards
the cover)
• 0.5-50 l/h
• 2-100 l/h
• 15-500 l/h
hole of the magnet seat is not visible (set
towards the bottom of the housing)
→
Set the radius of curvature present on the periphery of the oval
rotors towards the bottom of the rotor housing (see Fig. 9).
A A
A-A
round-off
right angle
Fig. 9: Cross-section of an oval rotor
→
Make sure that the magnet is in place by using a detector.
→
Make sure that the rotors freely turn by turning them slowly with
the finger.
→
Put the seal (mark 3 Fig. 7) in its groove.
→
Put the cover (mark 4 Fig. 7) on the housing, aligning the groove
on the cover with the one of the housing.
→
Tighten the 4 screws (mark 5 Fig. 7), carefully to avoid damages
to the housing, and in an alternating pattern at the following
torque:
- 1 Nm for a PPS housing
- 2 Nm for an aluminium housing
- 9 Nm for a stainless steel housing
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