Vega VEGAPULS 63 - 4 Mounting Alternatives; Measurement in Bypass Tube

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4 Mounting
VEGAPULS 63 • Modbus and Levelmaster protocol
41364-EN-170711
Constructive requirements:
•
Material metal, smooth inner surface
•
Preferably pultruded or straight beaded stainless steel tube
•
Welded joint should be straight and lie in one axis with the holes
•
Flanges are welded to the tube according to the orientation of the
polarisation
•
Whenusingaballvalves,alignthetransitionsontheinsideandx
accurately
•
Gapsizewithjunctions≤0.1mm
•
Surge pipes must extend all the way down to the requested min.
level, as measurement is only possible within the tube
•
Diameterofholes≤5mm,anynumberOK,ononesideorcom-
pletely through
•
The antenna diameter of the sensor should correspond to the
inner diameter of the tube
•
Diameter should be constant over the complete length
Instructions for surge pipe extension:
•
The ends of the extension tubes must be bevelled and exactly
aligned
•
WeldedconnectionviaexternalUprolesaccordingtoillustration
above.LengthoftheUprolesshouldbeatleastdoublethetube
diameter
•
Do not weld through the pipe wall. The surge pipe must remain
smooth inside. Roughness and beads on the inside caused by
unintentional penetration should be removed since they cause
strong false echoes and encourage buildup
•
Anextensionviaweldingneckangesorpipecollarsisnotrecom-
mended.
An alternative to measurement in a surge pipe is measurement in a
bypass tube outside of the vessel.
Measurement in the
bypass tube