Airlock - Walinga Central-Vac Operator And Parts Manual

5.2.3

AIRLOCK

The airlock acts as a seal between the vacuum
and atmosphere sides of the machine and is
located at the bottom of the collector cyclone tank.
As the airlock rotor turns, a pocket is filled with
material when it points upward. As the pocket
rotates, it is moved to the bottom where the
material drops out of the pocket into the discharge
pipe.
Efficient operation of the airlock requires a close fit
between the tips of the rotor and the case to
maintain a seal between vacuum and atmosphere
sides.
When checking or maintaining the airlock, follow
this procedure:
1. Clear the area of bystanders, especially small
children.
2. Turn machine off, lock out tag out master
control panel and wait for all moving parts to
stop before starting maintenance work.
3. Checking Tip Clearance:
WARNING
Lock out tag out master panel
before inspecting or main-
taining airlock.
a. Checking the airlock can be
done through the inspection
door.
b. Use a feeler gauge to check
the clearance between the tip
and the case. Inspect each
tip over its entire width.
c. The clearance of the tips
must be maintained at 0.004
to 0.006 inches at all times.
Adjust or replace tips as
required to insure system
sealing.
d. Replace any tips that are
bent, chipped or broken.
NOTE
Blades are reversible if not
excessively damaged.
Fig. 31 AIRLOCK
Fig. 5-18 AIRLOCK