Veris V550 Installation Instructions

1.0 SCOPE

These instructions provide procedures for installing the
V550 Verabar flow sensor. Procedures are given for all
industrial flow measurement applications including
liquid, steam and gas service for both horizontal and
vertical piping configurations.

2.0 RECEIVING INSPECTION

The following tasks should be performed as part of the
receiving inspection procedure:

• Check items received against the packing list.

• Check sensor nameplate for proper model num-

ber, serial number and customer number.

• Verify that the actual pipe diameter matches the
ID stated on the sensor nameplate.

• Check the bullet shaped sensor tube for any
signs of damage. Damage to the sensor tube
may result in erroneous flow readings.

• Check the round cover tube for any damage,
especially axial gouges or scratches. Damage to
the cover tube may prevent the ferrule from
sealing properly.

3.0 SAFETY PRECAUTIONS

The following tasks should be conducted prior to install­ing the Verabar flow sensor:

• Check maximum operating conditions on the flow
sensor nameplate and verify that they exceed the
maximum conditions of the installation. If any
pressure, temperature or flow limits will be
exceeded, consult the factory before proceeding.

• Check that the pipe is depressurized and drained
prior to installation.

Piping Configuration

Table 1. Straight Run Requirements

Verabar V550 (Flanged Spring-Lock)

INSTALLATION INSTRUCTIONS

• The Flanged Spring-Lock Model V550 is
designed for carbon and stainless steel pipes
with a schedule 10 or heavier wall thickness.
The V550 should not be used with PVC, copper,
aluminum, cast iron or thin-walled pipes or ducts.
If there is any question as to the proper
application for a model V550, consult the factory.

4.0 INSTALLATION PREPARATIONS

4.1 Location

For the most accurate flow measurement, a minimum
straight run of pipe is required. Table 1 shows the
minimum straight run requirements.

If longer straight runs are available, position the
Verabar such that the ratio of upstream straight run to
downstream straight run is approximately 4 to 1. If
straight run lengths are less than the values stated in
Table 1, consult the factory for additional accuracy and
location information.

Position straightening vanes such that the end closest
to the Verabar is half way between the Verabar and the
closest upstream configuration. For elbow installations,
mount the Verabar in the same plane as the closest
upstream elbow.

4.2 Orientation

Verify the proper sensor orientation by checking for an
“-H” (horizontal piping) or a “-V” (vertical piping) in the
model number on the Verabar nameplate.

4.2.1 Horizontal Piping

For air or gas installations, mount the Verabar in the
upper 160° of the pipe to allow any condensate to drain
into the pipe (Figure 1). For liquid or steam
installations, mount the Verabar in the lower 160° of the
pipe. This allows any entrained air to bleed back into
the pipe for liquid applications and allows condensate
to collect in the instrument piping for steam
applications.

4.2.2 Vertical Piping

The Verabar may be mounted in any location around
the circumference of the pipe for any vertical piping
applications.

Figure 1. Verabar Orientation in Horizontal Pipe

4.3 DP Transmitter/Local Indicator
Location

When choosing a Verabar location, consider the DP
transmitter/local indicator location:

• The transmitter must be mounted below the
Verabar for liquid and steam applications.

• The transmitter must be mounted above the
Verabar for air and gas applications.

4.4 Installation Drawings and Bill of
Materials

Additional information is available in the Installation
Drawings and Bill of Materials VB-7061 (also on the
VeraData CD). It contains standard and alternate
transmitter locations and a complete bill of materials
based on the fluid type and sensor orientation on the
pipe.

5.0 INSTALLATION PROCEDURE

5.1 Drill Hole in Pipe

• Completely depressurize and drain pipe prior to
installation of the Verabar.

• Mark the location of the hole through which the
Verabar will be mounted. Use a center punch to
mark the hole to prevent the drill bit from walking
on the pipe.

• Drill the pipe with the proper sized hole per the
following table:

Sensor Size Hole Dia

V550-05 1/2" (13mm)
V550-10 1” (25mm)
V550-15 1-1/2” (38mm)

• Deburr the hole on the inside of the pipe.

5.2 Weld Mounting Flange to Pipe

• With the follower and packing rings already in

place (factory assembled), insert the sensor into
the Spring-Lock body (Figure 3). Loosely bolt
together (hand tight) the sensor, gasket and
mounting flange. Insert the assembly until the tip
of the sensor hits the opposite side of the pipe.
Align the head of the sensor so that the arrow
labeled “flow” on the head is in the direction of
the flow to within 3°. The contour of the weld
coupling should match the contour of the pipe.
Check that the bottom of the weld coupling is in
contact with the pipe wall.

Figure 3. Spring-Lock Cutaway

• Using the appropriate weld gap (1/16” [1.5mm]
typical), tack weld the mounting flange into
position (Figure 4).

Figure 4. Weld Gap

• Note the flange orientation per Figure 5. The bolt
holes on the flange should straddle the centerline
of the pipe (2-holing pattern).

Figure 2. Verabar Model V550
studs must pass through the indicator ring and
the load plate.

• Align the head of the sensor so that the arrow
labeled “flow” on the head is in the direction of
the flow in the pipe to within 3° (see Figure 7).
Maintain the head in this position for the
remainder of the installation.

• Place the three lock washers and the three load
nuts on the studs and tighten. Tighten the load
nuts until the load plate is 0.050” (1.3mm) from
the indicator ring for –05 and –10 sensors. For
–15 sensors, the load plate should be 0.063”
(1.6mm) from the indicator ring (Figure 6). For
–05 sensors, this can be done by tightening all
the load nuts until the load plate just touches the
indicator ring and then backing off all the load
nuts one complete turn. For –10 and –15
sensors, this can be done by tightening all the
load nuts until the load plate just touches the
indicator ring and then backing off all the load
nuts ¾ of a turn. The load springs are now
properly set.

• Thread on the three jam nuts and tighten until
they are resting hand tight against the lock nuts.
Place a backup wrench on the load nuts to
prevent them from rotating. While not allowing
the load nuts to rotate, tighten the jam nuts 1/8
turn beyond hand tight.

• Using a torque wrench, tighten the three packing
bolts to the appropriate torque value listed in the
table below.

Sensor Size Packing Bolt

Torque (in-lbs)

–05 50 4.2

–10 100 8.3

Packing Bolt

Torque (ft-lbs)

Figure 5. Flange Orientation

• Remove the sensor and sensor flange, and finish
welding the weld coupling to the pipe per
applicable piping codes.

5.3 Insert Sensor

• With the follower and packing rings already in
place (factory assembled), insert the sensor into
the Spring-Lock body. Bolt the sensor flange to
the mounting flange with the gasket between the
flanges. The nuts should be tightened until the
gasket is completely crushed (the gasket
thickness should be approximately 1/8” [3mm]).
Insert the assembly until the tip of the sensor hits
the opposite side of the pipe. Note the three

–15 170 14.1

Note: The weld on the weld ring (Figure 6) should
not contact the top surface of the follower. If the weld
on the weld ring comes into contact with the follower,
the sensor will not be properly bottomed in the pipe.
If this occurs, consult the factory before proceeding.

Figure 6. Proper Spring Compression

Figure 7. Orientation of Flow Arrow

5.4 Insert Instrument Valves or Manifold

5.4.1 Valves

If the Verabar does not have a valve head, install
instrument valves using proper thread sealant. Be sure
instrument shut-off valves are installed and shut prior to
repressurizing the pipe.

5.4.2 Manifold

If the Verabar has a direct or integral manifold, be sure
the high and low pressure block valves are shut off
prior to repressurizing the pipe.

5.5 Pressurize Pipe and Retighten Bolts

Pressurize the pipe and check for leaks. If leaks are
present, retighten the packing bolts until leaking is
eliminated. Verify that the distance between the load
plat and the indicator ring is approximately 0.050”
(1.3mm) for –05 and –10 sensors and 0.063” (1.6mm)
for –15 sensors; make adjustments as needed.

The Verabar is now properly installed (Figure 8).

Periodic Maintenance

The assembly should be periodically checked. Verify
that no leaks are present. Tighten the packing bolts if
necessary.

6315 Monarch Park Place • Niwot, CO 80503 USA • Phone: [phone] IO-550 VWI-CS-31 REV B (6/08)
Fax: [phone] • Email: [e-mail] • Website: www.veris-inc.com Printed in USA

Figure 8.

Installed V550