User`s manual

Chapter 2 Installation AX2200/AX2300 Instruction Manual
2-4 CM2-AX2000-2001 (Rev. 4, 4/2014)
Wafer-Style Flow Meter Installation
Install the wafer-style meter between two conventional pipe flanges of the
same nominal size as the flow meter. If the process fluid is a liquid, make
sure the meter is located where the pipe is always full. This may require
locating the meter at a low point in the piping system. Note: Vortex flow
meters are not suitable for two-phase flows (i.e., liquid and gas mixtures).
For horizontal pipelines having a process temperature above 300° F,
mount the meter at a 45 or 90-degree angle to avoid overheating the elec-
tronics enclosure. To adjust the viewing angle of the enclosure or dis-
play/keypad, see page 2-18 and 2-19.
Figure 2-3. Wafer-Style Flow Meter Installation
When installing the meter make sure the section marked with a flow arrow is po-
sitioned upstream of the outlet, with the arrow head pointing in the direction of
flow. (The mark is on the wafer adjacent to the enclosure mounting neck.) This
ensures that the sensor head is positioned downstream of the vortex shedder bar
and is correctly aligned to the flow. Installing the meter opposite this direction
will result in completely inaccurate flow measurement. To install the meter:
1. Turn off the flow of process gas, liquid or steam. Verify that the line
is not pressurized. Confirm that the installation site meets the required
minimum upstream and downstream pipe diameters.
2. Insert the studs for the bottom side of the meter body between the pipe
flanges. Place the wafer-style meter body between the flanges with the
end stamped with a flow arrow on the upstream side, with the arrow
head pointing in the direction of flow. Center the meter body inside the
diameter with respect to the inside diameter of the adjoining piping.
3. Position the gasket material between the mating surfaces. Make sure
both gaskets are smooth and even with no gasket material extending in-
to the flow profile. Obstructions in the pipeline will disturb the flow and
cause inaccurate measurements.
Caution!
When using toxic or corrosive
gases, purge the line with inert
gas for a minimum of four hours
at full gas flow before installing
the flow meter.