Vega VEGASWING 61 Operating Instructions Manual - page 13
VEGASWING 61, 63 - N
13
25470-EN-030707
Mounting
Fig. 2.3
Adhesive products
In case of horizontal mounting in adhesive
and viscous products, the surfaces of the
tuning fork should be vertical in order to
reduce buildup on the tuning fork (see fig.
2.2). The orientation of the tuning fork is
marked by a notch on the hexagon of VEGA-
SWING. With this you can check the orienta-
tion of the tuning fork when screwing it in.
When the hexagon touches the seal, the
thread can still be turned by approx. half a
turn. This is sufficient to reach the recom-
mended installation position.
In case of adhesive and viscous products,
the tuning fork should protrude into the ves-
sel to avoid buildup. Sockets for flanges and
mounting bosses should therefore not ex-
ceed a certain length. The tuning fork should
protrude into the vessel/pipeline.
Pressure
When there is gauge pressure or
underpressure in the vessel, the mounting
boss must be sealed on the thread. Cover
the thread with teflon tape, hemp or similar
material or use a sufficiently resistant seal
ring.
Vibrations
Extreme vibrations and shocks, e.g. caused
by stirrers and turbulence in the vessel, can
cause the extension tube of VEGASWING
63 to vibrate. This will cause increased stress
on the upper weld joint.
To counteract this, provide a support or
straining directly above the tuning fork to
firmly hold the extension tube (see fig. 2.3).
This applies mainly to applications in
Ex areas category 1G or WHG. Make
sure that the tube is not subjected to
bending forces.
Stirrers
Through the action of stirrers or similar de-
vices, the level switches can be subjected to
strong lateral forces. For this reason, do not
use an overlong extension tube for VEGA-
SWING 63, but check if it is possible to
mount a VEGASWING 61 level switch on the
side of the vessel in horizontal position.
Cable entries
Use a cable with round wire cross-section
and tighten the cable entry firmly. The cable
entry is suitable fro cable diameters from
5 mm to 9 mm.