KROHNE OPTISWITCH 52x0C ARV52 16bar EN - Manual (Page 9)

5 Maintenance and fault rectification
5.1 Maintenance
When used as directed in normal operation, lock fitting ARV 60
is completely maintenance-free.
5.2 Exchange seals
If the lock fitting is untight, you have to exchange the graphite
gasket rings. If you want to shift the sensor to change the
switching point, you also have to replace the graphite gasket
rings.
The numbers in brackets refer to the illustration under
"Mounting".
Danger:
Before dismounting, make sure that the vessel is unpressu-
rised
1 Loosen the screw (6) and remove the locking bracket (4)
2 Loosen pressure screw (11)
3 Hold the tube of the sensor and loosen the terminal screws
(3)
4 Pull the sensor out of the lock fitting
5 Unscrew the pressure screw (11) out of the mounting boss
(7)
6 Screw the mounting boss (7) with a new resistant seal ring
into the thread of the vessel and tighten the mounting boss
(7) on the hexagon (SW 41 or SW 60)
7 Unpack the new gasket and graphite gasket rings. The
graphite gasket ring (9) is thin; the gasket rings (8) are a
little thicker and have a layer configuration.
Make sure that the rings are not damaged. If you are not
sure, use new rings.
8 First of all place one of the new gasket rings (8) into the
mounting boss (7). Then place the graphite gasket ring (9)
on top. This is followed by the second gasket ring (8)
9 Place the pressure ring (10) of metal to the gasket rings
Lock fitting ARV 60 - up to 16 bar for OPTISWITCH 5200 9
Maintenance and fault rectification
30922
-EN
-050704