Walinga Airlock 1008, Operator'S Manual

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OPERATOR’S MANUAL
Uneven or poor material flow
Air loss through airlock due to
excessive tip clearance
Adjust the tips to decrease the clearance to the required specifications.
Excessive clearance causes operating problems including bridging and
erratic flow. Prolonged operation with excessive clearances will cause
uneven casing wear, resulting in lower performance even after tip
adjustment.
Airlock casing not pressure vented
Note: venting is not usually needed in
free-flowing materials with high bulk
densities, such as cereal grains
CAUTION : both air and excess feed may blow out of the vent hole
during testing. Keep eyes and face clear of the vent hole.
1. Loosen vent plug in end plate ( Figure 6-1 F )
2. Operate the airlock to transfer product, first with vent plug
installed and then with vent plug removed.
3. Check whether flow improves with the vent plug removed.
4. If flow improves, fit a pressure-vent kit. Refer to
Section 7:
Maintenance and Adjustments . Custom-designed vented
hoppers may also be used for fine products such as milled
meals.
Airlock tip or flexible tip wiper
breaks
Prolonged operation in reverse
direction
The airlock must operate in a counter-clockwise direction when viewed
from the driven end. Change the rotational direction and repair, adjust,
or replace tips and flexible wiper as necessary.
Tip wiper fouling on blade tips Readjust the clearance of the flexible tip wiper with the blade tips..
Excessive noise
Rotor blade tips not fully seated after
adjustment
It is normal to hear a light grinding noise for several hours after
adjustment of the airlock tip clearances. This noise will disappear after
the tips seat fully on the casing. If the noise is excessive the tips may
be adjusted too tight against the casing. Re-adjust tip clearances.
Tip clearances too tight
Check that the tip clearance matches the specifications. Adjust or
replace tips as required.
6-8 00-144476-0 A OPERATION