INTRODUCTION
Follow the instructions in this guide to assemble an EZ-View
Variable Area Flow Meter.
PRELIMINARY INSPECTION
When the meter arrives, it should have red caps in both ends, as
shown in Figure 1.
Figure 1: Red Caps
If the cone, piston and spring are not inside the meter, follow
all the instructions in this guide to install them and the
fittings. If the cone, piston and spring are already inside the
meter, simply install the fittings according to instructions in
“First Fitting” and “Spring Installation”.
CONE INSTALLATION
1. Stand the body on a table with the pointer guide rails toward
the top
NOT:N The deeper, inside ledge should be facing up.
Figure 2: Cone Installation
2. Insert the cone into the body, making sure it rests ush on
the ledge.
FIRST FITTING
1. Place the o-rings in the o-ring grooves on both end caps.
NOT:N Each end connection/fitting uses two o-rings. The
o-rings will sit on the lip above the point where the
threads start.
Figure 3: Lubricate o-rings
2. Lubricate the o-rings with DTE-24 oil or equivalent.
3. By hand or with a wrench, screw one tting ush onto the
end of the body to secure the cone.
NOT:N If at any time during the installation the fitting needs to
be unscrewed (even partially), unscrew the end cap all
the way and make sure that the o-ring is seated properly
on the end cap before putting the end cap back on.
4. Turn the body over so that the end with the assembled end
tting is on the table.
PISTON INSTALLATION
1. Locate the piston.
Figure 4: Piston
VAM-QG-03804-EN-01 (February 2019)
Variable Area Flow Meter
EZ-View® Fittings Assembly
Quick Guide
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2. Place the piston inside the meter, over the cone as shown in
Figure 5.
Figure 5: Piston installed
SPRING INSTALLATION
1. Install the spring into the body with the double coils up.
Figure 6: Spring double coils
2. Secure the already fastened tting of the meter in a vice or
dedicated xture.
Figure 7: Meter in a dedicated xture
3. Place the second tting into the open end of the meter and
hand-thread for a few turns, making sure that it is at/level.
4. Once the tting is started, use a spring depressor to keep the
spring from hindering the tting from fully seating.
Figure 8: Spring depressor
5. Using appropriate torque wrench with locknut socket,
tighten the tting to 85…90 ft·lb.
Figure 9: Torque wrench
6. Flip the meter over in the vice and tighten the second tting
using the appropriate torque wrench.
NOT:N After installing the second fitting, visually inspect
both ends of the unit to make sure that the o-ring has
been properly installed and is properly seated. If it is
protruding out of the o-ring groove, remove the fitting,
remove and inspect the o-ring (replace with a new
o-ring if there are any nicks, cuts or scrapes) and reinstall
making sure that it is seated properly.
NOT:N After assembly of the meter, visually inspect both ends
of the meter for uniformed circumferential lines of
contact between the o-rings and meter body.
FULLY ASSEMBLED METER
Figure 10: Assembled meter
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