KROHNE LS 72xx EN - Manual (Page 4)

02/2013 LS 72xx 4
1 Installation
1.1 Mechanical installation
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Use only the recommended sleeves or adapters. If other systems are used, no guarantee can
be given for proper functioning or leak-tightness.
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The connection thread must have direct electrical contact with the threaded sleeve and the
metal vessel.
•
Do not use Teflon or paper gaskets.
•
The stub electrode can be used in electrically non-conducting vessels (e.g. plastic tanks) if
the screw-in sleeve has a metal surface that can be used as reference ground.
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The tightening torque for the sleeve should be between 10 and
20 Nm.
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The rod electrodes can be shortened to any required length (by clipping, sawing, etc). Make
sure not to damage the coating or the insulating part.
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Insulated rods: remove about 10 mm of the coating from the end of the rod, using an abrasive
disc, a sanding belt or a sharp knife.
•
Make absolutely sure that the rod electrode cannot come into contact with the pipe or tank
wall. Also take into consideration the fact that the rod may be deflected by movement in the
liquid product. If necessary, select a more favourable mounting location.
1.2 Process connection
The hygienic ½” process sleeve is easy to weld in into tanks or pipes. The kind of assembly allows
installation in conformity with standards of hygiene (to EHEDG, FDA). The G1/2” and G1”
connections can be mounted in any counter thread acc. to ISO 228.
Various hygienic adapter sleeves (refer to chapter “Accessories”) are available for fitting to other
process connections. For more information refer to data sheet “Accessories”