Kongskilde TRL 20 Instructions De Service page 13

varies during operation. This en-
sures that the air velocity suits the
conveying and reduces the load on
the motor.
When working the motor should al-
ways run on delta. If the motor runs
on star the risk of damage is great,
as it is not protected against over-
loading.
Rotary Valve
Start first the blower as described
above. Check that the rotary valve´s
intake shutter is closed. Start the
rotary valve when the blower has
reached full speed and open the
shutter gradually. (The blowers TRL
100/150/200/300/500 can be deliv-
ered with automatic start of the ro-
tary valve).
The capacity is regulated by means
of the intake shutter. For blowers
with air intake regulator the biggest
capacity is reached by slowly open-
ing the intake shutter of the rotary
valve until the indicator on the in-
take regulator is about 10 mm from
the left stop. For blowers without air
intake regulator maximum capacity
can only be achieved by trial and
error.
Venturi
Where the venturi is provided with
an intake shutter, this must be
opened fully when the blower is
started. The venturi is self-regulat-
ing. It does not take in more materi-
al than the blower can cope with.
The shutter must be closed again
before the blower is stopped.
Maintenance
TRL 500: Grease the bearings on
the blower belt side every 200 work-
ing hours. Use a lithium base
grease of minimum quality as Mobil
Mobilux EP2 or Esso Beacon EP2.
Regrease with approx. 20 cm³ =
20 g each time. Never overgrease
the bearings. If the casing is filled
with too much grease, the bearing
will get hot.
It is quite normal for the housing of
a new blower to get up to 60-70°C
(140-160°F) warm.
All other bearings are greased at
the factory and no further greasing
is required.
The motor must not be covered and
should be kept free from dirt which
might reduce cooling down the mo-
tor.
Check regularly that the V-belts are
tight, especially when they are new.
A new V-belt normally requires ad-
justment after 1-2 hours work. To
inspect the V-belts remove the cov-
er of the belt guard. Press the V-
belts, they must be tight.
The V-belts are adjusted by moving
the motor in the slots. Ensure that
the belt pulleys remain in alignment.
This can, for example, be done by
holding a straight board against the
belt pulleys.
After the first day of operation all
bolts must be retightened.
Mounting the
pipeline
Use Kongskilde OK 160 pipes for
the pipeline. They are easy to
handle and the tight, smooth joints
are ideal for conveying and high
capacity.
The pipeline should be as short as
possible and with no more bends or
diverter valves than necessary. This
will give the highest conveying ca-
pacity.
The pipeline should also be as air-
tight as possible, leaks reducing
conveying performance. Leaks in
the pipes near to the blower will
cause the biggest drop in capacity.
Use any older pipes farthest away
from the blower.
Always use pipes of the same diam-
eter in the pipeline. Even a short
lenght of piping having a bigger or
smaller diameter will reduce con-
veying performance quite dramati-
cally.
With horizontal pipelines the OK-
pipes should be assembled in such
a way that the seams are on top or
at the sides as this will reduce
wearing of the pipes.
On fixed pipe layouts OK-160 bolt
clamps should be used. They pro-
vide stronger joints than quick re-
lease clamps do.
Rotary valve or venturi can be
placed whereever it is required in
the pipeline. Bends before the rota-
ry valve do not materially reduce
conveying capacity.
It is recommended to place appr. 2
metres of straight piping between
rotary valve and the first bend. It is
also recommended to have a mini-
mum of 2 metres of straight piping
between any two bends in the pipe-
line. This gives the highest convey-
ing capacity.
Always avoid inclined pipelines as
this reduces conveying perform-
ance more than vertical pipelines
and increases wear of the pipes.
Terminate the pipeline with a cy-
clone or an exhaust head.
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