Veris Verabar V400D Installation Instructions Manuel d'utilisateur télécharger pdf (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.

Cover

Tube

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

V400-10 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 drive nuts

should be alternately tightened approximately 1/8”

(3mm) at a time. This will prevent excess bowing

of the cover tube and drive rods.

• 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 nuts toward the threaded bushings.

The jam nuts should press tightly against the

threaded bushings. This will lock the drive rods in

place and maintain the sensor position in the pipe.

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

1 2 3 4

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Veris Verabar V400D Installation Instructions Manuel d'utilisateur Page 3

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