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Pressure screws have been tightened and tested in our factory with the
•
corresponding tightening torques (see table chapter 8.6). Never re-tighten
pressure screws during mounting / commissioning.
Check if level gauge shows any leakages especially during first days after
•
commissioning.
Leakage
In case of leakage, close upper and lower shutoff valve (2, 3) and slowly open
•
drain valve (4) a little.
Fully open drain valve if pressure has escaped.
•
Re-tighten pressure screws from top to bottom in several steps (see table
•
chapter 8.6) starting in the centre and using successively opposite diagonal
tightening up to a tightening torque of Md
8. Maintenance
8.1 Leakage
Re-tighten corresponding screw connection in case of leakage
See point 7.3 (Re-tightening of screws).
If necessary, replace gasket and check sealing surface.
Severe burns and scaldings on the whole body are possible!
Replace gaskets only if level gauge is empty and pressureless!
8.2 Cleaning of glasses
During first commissioning or re-commissioning, oil or grease residues can
deposit on the inside of the glass.
In this case:
Close shutoff valves (2,3).
•
After removing plug (6), the glasses and channel of the gauge body can be
cleaned with a circular brush.
8.3 Cleaning / purging of level gauge
Close upper and bottom shutoff devices (D1,D2,W1,W2).
•
Open drain valve (4), hence unit is drained. Normally, the cleaning is finished
•
now.
For commissioning see point 7.
•
If cleaning was not sufficient:
Close upper and bottom shutoff device (D2,W2).
•
= 60 Nm .
max
11
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