KROHNE OPTISWITCH 3300C ARV33 16bar EN - Manual (Page 6)

4 Mounting
4.1 General instructions
The note of the following general safety instructions:
l
Dismount the lock fitting only in unpressurized condition
l
Use only suitable graphite gasket rings. Make sure that the
graphite gasket rings are not damage. Damaged rings are
no longer tight. If you are not sure, use new rings.
l
Only use approved hexagon screws DIN 912 M8 x 30 of
A4-70 acc. to AD leaflet W2. The corresponding spring
rings B8 must be made of A4 acc. to DIN 7980.
l
Grease the thread of the mounting boss as well as the
thread and the support of the terminal screws with a
suitable lubricant. The lubricant must be suitable for
material combination 316L/316L and for a temperature
range of -50 … +250°C (-58 … +482°F) e.g. Varybond
type NSS-16/7. The threads are already supplied with a
lubricant.
4.2 Mounting procedure
The lock fitting is already premounted.
The numbers in brackets refer to the following illustration.
1 Loosen the screw (6) and remove the locking bracket (4)
2 Screw mounting boss (7) with a resistant seal ring into the
thread of the vessel and tighten the mounting boss (7) on
the hexagon (SW 75)
3 Clean the connection tube of the sensor and the surfaces
of the clamp (1) as well as the pressure screw (11)
carefully and remove grease, oil and dirt. Insert the sensor
into the lock fitting. Slide the tube into the requested
position and hold it
4 Make sure that the sensor is in the correct position (height.
The height adjustment of the sensor determines also the
switching point
5 Tighten the pressure screw (11) with a torque 240 ±10 Nm
(177 ±7 lbf ft)
6 Continue to turn the pressure screw (11) clockwise until the
hexagon surfaces of the pressure screw (11) and the
mounting boss (7) correspond (max. 1/6 turn)
6 Lock fitting ARV 67 - up to 16 bar for OPTISWITCH 3300 C
Mounting
30925
-EN
-050704