Siemens SITRANS LVL200E Manual de Instruções - Página 9
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MAN-100057
4
Mounting
4.1
General instructions
The note of the following general safety instructions:
•
Dismount the lock fitting only in unpressurized condition
•
Use only suitable graphite gasket rings. Make sure that the graph-
ite gasket rings are not damage. Damaged rings are no longer
tight. If you are not sure, use new rings.
•
Only use approved hexagon screws DIN 912, M6 x 25 of A4-70
according to AD leaflet W2. The corresponding spring rings B6
must be made of A4 according to DIN 7980.
•
Grease the thread and the support of the terminal screws with a
suitable lubricant. The lubricant must be suitable for material com-
bination 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 sequence
The lock fitting is already premounted.
The figures in brackets refer to the following illustration.
1. Loosen the fixing 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 41 or SW 60)
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 setting of the sensor also determines the switching point
5. Tighten the pressure screw (11) with a torque 70 ±10 Nm
(51 ±7 lbf ft)
6. Continue to turn the pressure screw (11) clockwise until the hexa-
gon surfaces of the pressure screw (11) and the mounting boss
(7) correspond (max. 1/6 turn)
7. Tighten the terminal screws (3) alternately. Make sure that the
gap between clamp and pressure screw is in parallel. Tighten the
terminal screws with a defined torque.
Corresponding torques: see chapter "Technical data".
Hence the clamp (1) is pressed against the tube and fixes the
tube of the sensor in this position
8. Fasten the locking angle (4) with the fixing screw (6) and the
spring ring (5) laterally on the pressure screw (11)
Hence the pressure screw and the terminal screw are secured
against unintentional loosening
Lock fitting - Operating Instructions
9