Veris Verabar V400S Installation Instructions - Manual (Page 3)

5.3 Retract Sensor and Tighten Packing
Retract the Verabar such that the tip of the sensor is
flush with the end of the access nipple (Figure 3).
Tighten the packing bolts on the packing gland.
Figure 3. Access Nipple
5.4 Weld Mounting Flange to Pipe
Mark the location where the Verabar is to be mounted.
Position the mounting flange over the center of the mark.
Using the appropriate weld gap, tack weld the mounting
flange into position. Note the flange orientation per
Figure 4. The bolt holes on the flange should straddle
the centerline of the pipe (2-holing pattern). Finish
welding the mounting flange to the pipe per applicable
codes.
Figure 4. Flange Orientation
5.5 Install Access Valve
Bolt the access valve to the mounting flange using the
gasket, studs and nuts provided.
5.5.1 Horizontal Pipes
Orient the valve such that the valve stem is parallel with
the centerline of the pipe (Figure 5).
5.5.2 Vertical Pipes
Orient the valve such that the valve stem is perpendicular
with the centerline of the pipe (Figure 5).
Figure 5. Access Valve
Verify that the access valve is properly tightened to the
mounting flange, because beyond this point it will not be
serviceable without depressurizing the line.
5.6 Drill Hole in Pipe
•
With the access valve in the full open position,
install an appropriate Hot Tap Drilling Machine
(Figure 6) and drill a hole in the pipe (hole sizes
per the chart below). Follow the instructions given
by the Hot Tap Drilling Machine.
Sensor Size Hole Dia
V400-05 1/2" (13mm)
V400-10 1” (25mm)
V400-15 1-1/2” (38mm)
•
After the hole is completely drilled, retract the Hot
Tap Drilling Machine. Shut off the access valve
prior to removal of the Hot Tap Drilling Machine.
Figure 6. Hot Tap Drilling Machines
Note: There are numerous Hot Tap Drilling Machines on
the market with various pressure and temperature
ratings. These devices can usually be rented at a local
utility company. For more information concerning Hot
Tap Drilling Machines, the following companies can be
contacted: Mueller Co., Decatur, IL (217) 423-4471 or
T.D. Williamson Inc., Tulsa, OK (918) 446-1941.
5.7 Mount Sensor Assembly to Access
Valve
Orient the sensor such that the arrow labeled “flow” on
the instrument head is in the direction of the flow in the
pipe to within 3° (orientation per Figure 7). Bolt the
access nipple to the access valve using the gasket,
studs and nuts provided.
5.8 Vent Access Valve to Verify No
Leaks are Present
With the instrument valves shut, slowly crack open the
access valve and verify that there are no process fluid
leaks. If leaks are present, shut off the access valve and
tighten the leaky joint.
5.9 Insert Verabar Sensor Assembly
Warning: The flow rate must be decreased to the
amount stated on the Verabar tag: the maximum
insertion/withdrawn DP/flow limit.
•
The Verabar should be oriented such that the
arrow on the head is pointing in the direction of
flow.
•
Completely open the access valve. Then, using
the drive nut, insert the sensor.
•
The tip of the sensor should completely bottom on
the opposite end of the pipe. Continue to insert
the sensor until firm resistance is met. This will
occur when the sensor plate is approximately 2”
(51mm) from the top of the packing gland.
•
Thread the jam nut toward the threaded bushing.
The jam nut should press tightly against the
threaded bushing. This will lock the drive rod in
place and maintain the sensor position in the pipe.
Cover
Tube
90°
HORIZONTAL VERTICAL
GAP (1/16” TYP)
TACK WELD, THEN
COMPLETE WELD
ACCESS VALVE
STEM PARALLEL TO
CENTER LINE
ACCESS VALVE
STEM 90° FROM
CENTER LINE