Exchanging The Seal - Siemens SITRANS LG240 Operating Instructions Manual
Guided wave radar profibus pa polished rod probe
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Also See for SITRANS LG240:
- Operating instructions manual (88 pages) ,
- Operating instructions manual (80 pages)
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Exchanging the seal
PBD-51041044
2. Screw out the loosened measuring rod by hand
3. Push the enclosed new seal ring onto the thread.
4. Screw the new rod carefully by hand onto the thread on the pro-
cess fitting.
5. Exert counterforce manually and tighten the rod on the flat sur-
faces with a torque of 4.5 Nm (3.32 lbf ft).
Fig. 23: Exchanging the measuring rod
1
Seal ring
Information:
Please maintain the specified torque so that the max. tensile strength
of the connection remains.
6. Enter new probe length and if necessary the new probe type and
then carry out a fresh adjustment (see "Setup procedure, Carry-
ing out min. adjustment - Carrying out max. adjustment").
9.7
Exchanging the seal
If necessary, the seal of the probe can be exchanged.
You can exchange the seal in case of wear or replace the existing seal
for resistance reasons against a seal of another material. If you have
to remove the process fitting of the probe for cleaning purposes, then
you also have to use a new seal.
To loosen the measuring rod, you need a size 10 wrench.
Note:
Instruments with 3A manufacturer declaration have to be specially
sealed. Such instruments must therefore be returned to the factory
when a seal replacement is necessary.
Three different seal sets are available. They contain the seals for the
process fitting and the measuring rod. For segmented rods, several
seals for the measuring rod are included.
Exchange the seal whenever you loosen connection.
•
EPDM (Freudenberg 70, EPDM 291), -20 ... +130 °C
•
FFKM (Kalrez 6221), -20 ... +150 °C
•
FEPM (Vi 602 Extreme-ETP, COG), -10 ... +150 °C
SITRANS LG240 - Operating Instructions
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