6
ROTA‑GRATE
®
MAGNETIC SEpARATOR
The speed of operation should be 30 rpm or less,
depending upon the condition of the material
being processed. A good average speed for best
results is 16.5 rpm.
AUTOMATED ROTA‑GRATE
®
MAGNET
1. Be sure the Automated Rota-Grate is rigidly
attached to mating flanges in the vertical
closed system.
2. Before separating material, turn on the control
box power supply and cycle the unit using the
manual switch. (Allow ten seconds for the unit
to complete the cycle).
3. Continue to cycle three or four times to
become familiar with operating the unit.
4. On the control box, set the automatic cycle
time as desired. Timer unit can be changed to
hours or minutes by removing the timer face and
setting lever on the desired increment. A lever
behind the face will also set the decimal point.
NOTE:
For optimum iron separation, cycle the
unit frequently. Cycle times of fifteen minutes
to one hour are standard, but product testing
or observation of magnet loading, through the
product area access door, will help determine
your specific requirement. Fully loaded magnets
will have bands of iron particles that are built
up from 1/8 to 1/4-inch (3 to 6 mm) above the
surface of the tube. Cycle times less than ten
minutes are not recommended. Consider adding
additional units if extremely short cycle times
are required to remove excessive iron buildup.
Operation
Cleaning & Maintenance
WARNING
If your product is abrasive to the point of wearing
through the non–magnetic magnet tubing, magnet
material may enter the product stream. This
exposure could be harmful to the quality of your
product. Examine each magnet tube for wear
during your cleaning operation.
5. Regulator pressure has been preset at the
factory. However, there may be conditions during
material separation (sticky or wet material,
heavy tramp iron load) that will prevent the
magnetic tubes from moving out of product
flow for automatic cleaning. If the Automated
Grate experiences slow operation, adjust the
regulator to increase the air pressure. Increase
air pressure in increments of 10 psi (.7 bar),
until the unit operates fully, without hang-ups.
DO NOT LuBRICATE MAGNET TuBES.
ROTA‑GRATE
®
MAGNETIC SEpARATOR
WARNING
Never attempt to clean the magnets while the
unit is in operation. Bodily injury can occur.
lockout/Tagout before cleaning.
Cleaning is accomplished by removing
accumulated ferrous material by hand. Should
fine ferrous contamination be involved, the tubes
can be wiped clean by means of a rag or gloved
hand. Care should be taken to prevent dropping
any ferrous particles back into the cleaned material
outlet. It is recommended that the tubes be
cleaned at the top position so that if any ferrous
particles are dropped they may be caught by the
lower magnetic tubes.
Blotting the tube with the sticky side of masking
tape will also aid in fine iron removal.
The necessary frequency of cleaning will be
determined by the amount of ferrous contamination
in the material being processed. The unit should
be cleaned often to prevent an excessive
accumulation of ferrous contamination on the
magnetic tubes, as this will reduce the magnetic
separation efficiency.
Lubricate bearings on a schedule consistent
with other equipment in use with your product
and environment. An NGLI No. 2 lithium-based
grease is recommended. For motor and gear
reducer maintenance, refer to the manufacturer’s
instructions packed with the equipment.