n
Figure 1
Operation of the Magnet Lowering Device: 1.
pull outwards, 2. slide along slot, 3. lock into position.
WARNING:
Make sure the drive unit is not running
and in automated installations make sure that lock-out
procedures have been followed.
1. Pull the handle outwards to unlock it from its locked
position.
2. Slide the handle through the S-shaped slot to move
the shaft and magnet rotor down/up.
3. Make sure that when in its final position the handle
locks back into the locked position.
CAUTION:
Make sure that while operating the Magnet
Lowering Device there is enough room for the handle
and the operator’s hand to move freely without inter-
fering with pipes, tank legs or other objects.
CAUTION:
Keep fingers away from the S-shaped slot
when operating the Magnet Lowering Device, the mag-
netic forces present and the spring-loaded locking han-
dle might cause involuntary movements with risk for
pinching fingers.
See figure 2 for an example of a warning sign that can
be used to avoid incorrect installation/removal of the
impeller.
4. MAGNET LOWERING DEVICE PRODUCT
RANGE
The Magnet Lowering Device is available for non-ATEX
Sterimixer from size 85 and up. In order to accommodate
Mixer size
Delivered before 2018
Magnet Lowering Device
DU LD UPGRADE KIT
a
85
113062
120/150
112393
120/190
112830
120H
112832
210
112834
Mixer size
Delivered in/after 2018
Magnet Lowering Device
DU LD KIT
b
85
113121
120/150
112835
120/190
112836
120H
112837
210
112838
a
includes extended drive unit flange, extended shaft and lowering device
b
includes lowering device, assumes re-using shaft and flange
n
Table 1
Part numbers for upgrade kits. Refer to sec-
tion 7 for details.
for the magnet rotor when in the lowered position, the use
of the Magnet Lowering Device requires the drive unit to
be equipped with the cooling jacket extension.
Retrofit kits are available that facilitate upgrading ex-
isting installations with this feature. Two different kits are
available depending on the original drive unit’s age, see
table 1. Fitting the upgrade kit is described in section 7.
5. SENSOR OPTION FOR AUTOMATION
The lowering device can be equipped with an optional
sensor that verifies that the Magnet Lowering Device is in
the raised position and that the mixer can be started. This
sensor included a LED which facilitates quick visual feed-
back (rotor up/down) during walk-around inspections of
the plant.
6. MAINTENANCE
The Magnet Lowering Device does not require special
maintenance.
7. FITTING THE UPGRADE KIT TO EXISTING
DRIVE UNITS
The upgrade kits (see table 1 for part numbers) come in
two versions:
DU LD UPGRADE KIT:
This kit must be used when up-
grading drive units that were delivered before 2018
(and after 2008, consult the factory for details). This
kit can also be used to upgrade drive units that do
not have the cooling jacket extension (adding the low-
ering device will change the space requirement of
the drive unit!). The kit includes extended drive unit
flange, an extended shaft, the mounting tool and the
lowering device (items 1, 2, 3, 4 in figure 3).
www.steridose.com
Installation & Operation
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