Installing a VN2000 Meter
Page 10 June 2018VRX-UM-02217-EN-04
5. Apply plumber’s tape to the threaded ends of the meter shaft.
6. Align the meter to the valve and turn the machined hex of the seal assembly to screw the meter into the valve.
OTE:N When screwing the 1-1/2 in. NPT threads into the valve, do not use the large nut on the top of the seal assembly. Use
the machined hex on the seal assembly. The large nut is only used to tighten down on the split ring, which holds the
bar in place, keeping it from being pushed out of the line under pressure. It is not a sealing nut.
7. After the meter is sealed into the valve, slowly open the valve and check for possible leaks between the valve and meter
seal assembly. If there are any leaks, close the valve and retry sealing the valve and meter seal assembly.
8. After the valve is completely opened, you are ready to insert the meter sensing element.
9. Loosen the large hex nut to allow the meter shaft to move.
DO NOT LOOSEN THE NUT UNLESS THE LINE IS DEPRESSURIZED OR A HOT-TAP MECHANISM HAS BEEN INSTALLED
PROPERLY ON THE METER SHAFT.
10. Insert the meter shaft until the distance from the alignment ag at the top of the insertion shaft to the top of the pipe = A.
Check the Alignment
After installing the meter, check for alignment. There is an arrow on the flats on the top of the bar nearest to the electronics,
which should point EXACTLY DOWNSTREAM.
This arrow is aligned with the element and will give proper alignment of the element. If this arrow does not point downstream
after installing the meter, rotate the bar.
1. The ats on the top of the bar next to the electronics will accommodate a 1 in. open-ended wrench. Rotate the bar until
the arrow faces downstream. If the assembly is too tight to rotate the bar, loosen the large nut on the seal assembly. The
bar will not slide out.
2. After aligning the arrow, keep the 1 in. open-ended wrench on the ats on top of the bar. Hold it in place and tighten
down on the larger nut on the seal. This will prevent the bar from turning when completing the nal tightening on the
split-ring nut.
MPORTANTI
For a final check, make certain that the meter has not come loose from its 1-1/2 in. NPT connection and that the split ring nut and
seal assembly are firmly in place.
STAY CLEAR OF THE METER WHEN THE LINE IS BEING PRESSURIZED. THIS IS GOOD SAFETY PROCEDURE FOR THE
INSTALLATION OF ANY EQUIPMENT IN A PRESSURIZED LINE.
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