VEGA ARV60.CB4 up to 64 bar - Manual (Page 3)

Lock fitting ARV60.CB4 up to 64 bar 3
Product description
1 Product description
The lock fitting ARV60.CB4 is a pressure-tight
clamping connection with G 1
A, G1½A or 1
NPT, 1½ NPT thread and can be used to-
gether with a level sensor in tube version
(e.g. VEGASWING 63). The tube extension of
the sensor must have a diameter of
21.3 mm
(DIN 2463/2462 D4-T3) .
The wetted parts of the lock fitting are either
manufactured of steel 1.4435 (316L) or
Hastelloy C22 (2.4602).
The compression screw of the lock fitting
ARV60.CB4 radially squeezes a graphite
package consisting of four rings, which then
presses axially against the tube of the sen-
sor. When properly mounted, a tight seal is
formed by the graphite package. The lock
fitting bracket secures the compression
screw and the clamp against unauthorised or
inadvertent loosening.
The lock fitting has the following approvals:
- tested by TÜV Rheinland acc. to
DruckbehV
- Zone 0 (ElexV) in combustible substances
of Ex group IIB up to max. 6 bar
- WHG
Note
If the lock fitting has to be removed for serv-
ice or control purposes, you have to make
sure that the vessel is unpressurised. Switch
the power supply of the sensor off and re-
move all connection cables. Loosen the
mounting boss (6) with a spanner (SW 46).
Now you can remove the sensor together
with the lock fitting. It is therefore not neces-
sary to readjust the switching point and the
lock fitting must not be completely disassem-
bled.
1.1 Safety information
• Dismount the lock fitting only in
unpressurised condition.
• Only use suitable graphite packing rings
(article no. 2.26486). Make sure that the
graphite packing rings are not damaged.
Damaged rings do not ensure tightness. If
you are not sure, use new rings.
• Exclusively use approved hexagon socket
head screws DIN 912 M6 x 25 made of A4-
70 acc. to AD regulation W2. The respec-
tive spring rings B6 must be made of A4
acc. to DIN 7980.
• Before screwing in, lubricate the thread of
the mounting boss, as well as the thread
and the head of the screws with a suitable
lubricant. The lubricant must be suitable for
the material combination 1.4435/1.4435
(stainless steel/stainless steel) or 2.4602/
2.4602 (Hastelloy/Hastelloy) and for a
temperature range of -50°C up to +250°C,
e.g. Varybond type NSS-16/7. The threads
come factory-treated with a suitable lubri-
cant.