Aalborg Vortex Insertion - Manual (Page 11)

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3.5 Orientation
The Insertion Model flow meter uses piezo-electric sensing elements with no
moving parts. This eliminates wear and allows for vertical or horizontal installation.
3.6 Insertion Meter Installation Procedure
A) The Insertion Model will be inserted into the center line of the pipe for line
sizes 3 inches and larger. For sizes which are larger than 24 inches, a
one-third diameter insertion depth is used.
B) Please refer to your configuration to verify the proper installation drawing.
C) The Insertion Model inserts through a 1-1/2 inch hole, the weldolet, nipple
and valve. The valve must be threaded full bore 1-1/2 inches in size.
D) When the flange version is used, a flange is supplied. This flange has an
overall height of 3 inches. This must be taken into account when installing
the nipple. The overall height is given on the drawings.
E) When screwing in the 1-1/2 inch NPT threads into the valve, do not use
the large nut on the top of the seal assembly to tighten the meter in the
valve. Use the machined hex on the seal assembly. The large nut is only
used to tighten down on a split ring, which holds the bar in place, keeping
it from being pushed out of the line.
F) After installing the meter, check for alignment. There is a mark on the top
of the bar nearest the electronics which should face exactly upstream.
This mark is aligned with the element and will give proper alignment of the
element in the flow while facing upstream. If this mark does not face
upstream after installing the meter, the bar must be rotated. There are
flats on the top of the bar next to the electronics which accommodate a
one inch open ended wrench. The bar can be turned until the mark faces
upstream. If the assembly is too tight to rotate the bar, the large nut on
the seal assembly can be loosened.
G) After aligning the mark, keep your 1 inch open-ended wrench on the flats
on top of the bar, holding it in place, then tightening down on the larger nut
on the seal. This will prevent the bar from turning when completing the
final tightening on the split ring nut.
CAUTION: DO NOT LOOSEN THE NUT UNLESS THE LINE IS
DEPRESSURIZED OR A HOT-TAP MECHANISM HAS BEEN INSTALLED
PROPERLY ON THE METER SHAFT. ƽ