Flowserve ER 50-1 - Manual (Page 12)


Attention
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The seating surfaces of the threads or flange provided on the vessel or boiler standpipe
must be accurately machined, Fig. 5.
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Do not bend electrode tips when mounting.
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Do not include electrode body in the thermal insulation of the boiler.
Note
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For the approval of the boiler standpipe with connecting flange the relevant local and
national regulations must be considered.
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See four examples of installation on page 3.
Tools
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Open-end spanner 4 mm A. F.
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Bolt cutter
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Hacksaw
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Flat file, medium cut
Installation
ER 50-1, ER 56-1
. Determine required measuring lengths of the electrode tips and enter data in the table “Functions”,
Fig. 4.
. Cut electrode tips 1 , 2 , 3 and 4 accordingly.
3. Deburr faces of electrode tips.
4. Strip off 50 mm of PTFE insulation from the ends of the electrode tips.
5. Check seating surfaces of threads or flange provided on vessel or boiler standpipe,
Fig. 5.
6. Place joint ring 3 onto seating 2 of the electrode, Fig. 4.
Use only joint ring (of stainless steel .430) D 33 x 39 to DIN 7603 supplied with electrode.
7. Apply a light smear of silicone grease (e. g. DOW Corning  Compound) to electrode thread 4.
8. Screw level electrode into threads or flange provided on vessel or boiler standpipe and tighten with a
4 mm open-end spanner. The torque required is 40 Nm when cold.
Table “Functions”
Please enter data.
Function Function Electrode tip Length [mm]
Reference electrode 
e. g. pump OFF 
e. g. pump ON 3
e. g. high-level alarm 4