PFT levelling pin / Safety, overview, operation and service
Maintenance
4
3
Figure 15: Top up measuring liquid
5. Press self-closing valve (3) and hold open with ring (4).
6. Add measuring liquid through the top valve until the liquid column
in the measuring scale has risen again.
7. Re-attach the dust cap (2).
5.3.3
Venting
1
2
3
4
2
Figure 16: Opening shut-off valves
1. Open the shut-off valves (1) and the self-closing valve (2).
2. Bring the shut-off valves (1) and self-closing valve (2) to the same
level.
3
4
5
Figure 17: Venting
3. Pull the measuring hose (3) over a soft broom (4).
4. The broom (4) must be at a higher level than the base tank.
5. From the base tank (5), vent the hose to allow the liquid to flow
from the base tank.
6. Make sure that there is always enough measuring liquid in the base
tank.
7. After venting, close the shut-off valves (1) and the self-closing
valve (2).
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