VorTek M22 Series User manual
VorTek Series M22 and M23
Pro-V™ Vortex Volumetric and Mass Flow Meters
Document Number M-000-00010
Rev 07/2011
8475 W I-25 Frontage Rd
Suite 300
Longmont, CO 80504
(303) 682-9999 (888) 386-7835 Fax (303) 682-4368
http://www.vortekinst.com
Unless you have specifically ordered VorTek’s optional O
2
cleaning, this flow me-
ter may not be fit for oxygen service. Some models can only be properly cleaned
during the manufacturing process. VorTek Instruments, LLC., is not liable for any
damage or personal injury, whatsoever, resulting from the use of VorTek Instru-
ments standard mass flow meters for oxygen gas.
© COPYRIGHT VORTEK INSTRUMENTS 2011
No part of this publication may be copied or distributed, transmitted, transcribed, stored in
a retrieval system, or translated into any human or computer language, in any form or by
any means, electronic, mechanical, manual, or otherwise, or disclosed to third parties
without the express written permission of VorTek Instruments. The information contained
in this manual is subject to change without notice.
TRADEMARKS
Pro-V™ is a trademark of VorTek Instruments, LLC. Other product and company names
listed in this manual are trademarks or trade names of their respective manufacturers.
Pro-V™ Vortex Mass Flow Meters..................................................... 1-1
Using this Manual ......................................................................... 1-1
NoteandSafetyInformation......................................................... 1-2
ReceiptofSystemComponents.................................................... 1-2
Technical Assistance ..................................................................... 1-2
How the Pro-V Vortex Meter Operates............................................... 1-3
Velocity Measurement .................................................................. 1-3
Vortex Shedding Frequency .......................................................... 1-4
Vortex Frequency Sensing ............................................................ 1-4
Flow Velocity Range ..................................................................... 1-5
Temperature Measurement ............................................................ 1-6
Pressure Measurement ................................................................... 1-6
Flow Meter Configurations.................................................................. 1-7
Multivariable Options ................................................................... 1-7
LineSize/ProcessConditions/Materials.................................... 1-8
Flow Meter Electronics ................................................................. 1-8
Installation Overview........................................................................... 2-1
FlowMeterInstallationRequirements.......................................... 2-1
UnobstructedFlowRequirements................................................. 2-2
Series M22 In-Line Flow Meter Installation ....................................... 2-3
Wafer-StyleFlowMeterInstallation............................................. 2-4
Flange-StyleFlowMeterInstallation............................................ 2-5
Series M23 Insertion Flow Meter Installation..................................... 2-6
Cold Tap Guidelines...................................................................... 2-7
Hot Tap Guidelines ....................................................................... 2-8
Flow Meter Insertion ......................................................................... 2-10
InstallingMeterswithaCompressionConnection..................... 2-11
InstallingMeterswithaPackingGlandConnection................... 2-13
InstallingMeters(PackingGland),NoInsertionTool................ 2-16
Adjusting Meter Orientation.............................................................. 2-18
Display/Keypad Adjustment ....................................................... 2-18
Enclosure Adjustment ................................................................. 2-19
Loop Power Flow Meter Wiring Connections................................... 2-20
Input Power Connections ............................................................ 2-20
4-20 mA Output Connections ..................................................... 2-21
Pulse Output Connections ........................................................... 2-22
Frequency Output Connections ................................................... 2-23
OptionalBacklightConnections................................................. 2-23
Remote Electronics Wiring ......................................................... 2-24
High Power Flow Meter Wiring Connections................................... 2-26
Input Power Connections ............................................................ 2-26
4-20 mA Output Connections ..................................................... 2-28
Frequency Output Connections ................................................... 2-29
Pulse Output Connections ........................................................... 2-30
Alarm Output Connections ..........................................................2-32
Remote Electronics Wiring .........................................................2-33
OptionalInputElectronicsWiring.............................................. 2-34
Optional Energy EMS RTD Input Wiring .................................. 2-34
OptionalExternal4-20mAInputWiring...................................2-35
Optional Contact Closure Input Wiring ......................................2-36
Flow Meter Display/Keypad................................................................3-1
Start Up................................................................................................ 3-2
Using the Setup Menus........................................................................3-4
Programming the Flow Meter ....................................................... 3-5
Output Menu .................................................................................3-6
Display Menu ................................................................................3-8
Alarms Menu ................................................................................. 3-9
Totalizer #1 Menu .......................................................................3-10
Totalizer #2 Menu.......................................................................3-11
Energy Menu .......................................................................3-12
Fluid Menu.................................................................................. 3-13
Units Menu ..................................................................................3-14
Time and Date Menu ...................................................................3-15
Diagnostics Menu ........................................................................ 3-16
Calibration Menu .........................................................................3-17
Password Menu ...........................................................................3-18
HART Communications......................................................................4-1
Wiring ...........................................................................................4-2
HARTCommandswiththeDDMenu.......................................... 4-3
HARTCommandswithGenericDDMenu..................................4-4
MODBUS Communications................................................................ 4-7
Wiring ...........................................................................................4-7
Menu Items .................................................................................... 4-8
Register Definitions .....................................................................4-10
Hidden Diagnostics Menus..................................................................5-1
LevelOneHiddenDiagnosticsValues......................................... 5-3
LevelTwoHiddenDiagnosticsValues.........................................5-4
Analog Output Calibration ..................................................................5-7
Troubleshooting the Flow Meter .........................................................5-8
First Check Items................................................................................. 5-8
Record Values......................................................................................5-8
Determine the Fault .............................................................................5-9
Symptom: Output at no Flow ........................................................5-9
Symptom: Erratic Output ..............................................................5-9
Symptom: No Output ..................................................................5-11
Symptom:MeterDisplaysTemperatureFault............................ 5-12
Symptom:MeterDisplaysPressureFault...................................5-13
Electronics Assembly Replacement................................................... 5-14
Pressure Sensor Replacement (Series M22 Only) ............................ 5-15
Returning Equipment to the Factory.................................................. 5-15
1-1. In-Line Vortex Multi-Parameter Mass Flow Meter................ 1-3
1-2. Measurement Principle of Vortex Flow Meters...................... 1-4
1-3. Reynolds Number Range of the Pro-V................................... 1-6
2-1. Recommended Pipe Length Required for Installation............ 2-2
2-2. Flange Bolt Torquing Sequence ............................................. 2-3
2-3. Wafer-Style Flow Meter Installation...................................... 2-4
2-4. Flange-Style Flow Meter Installation..................................... 2-5
2-5. Hot Tap Sequence................................................................... 2-9
2-6. Insertion Calculation (Compression Type)........................... 2-11
2-7. Flow Meter with Compression Type Fitting......................... 2-12
2-8. Insertion Calculation (Meters with Insertion Tool) .............. 2-13
2-9. Flow Meter with Permanent Insertion Tool.......................... 2-14
2-10. Flow Meter with Removable Insertion Tool......................... 2-15
2-11. Insertion Calculation (Meters without Insertion Tool)......... 2-16
2-12. Display/Keypad Viewing Adjustment.................................. 2-18
2-13. Enclosure Viewing Adjustment............................................ 2-19
2-14. Loop Power Wiring Terminals............................................. 2-20
2-15. DC Power Connections......................................................... 2-20
2-16. Load Resistance Versus Input Voltage................................. 2-21
2-17. Isolated Pulse Output Using External Power Supply ........... 2-22
2-18. Non-Isolated Pulse Output Using External Power Supply... 2-22
2-19. Isolated Frequency Output Using External Power Supply...2-23
2-20. Non-Isolated Freq. Out. Using External Power Supply........ 2-23
2-21. Backlight Using External Power Supply.............................. 2-23
2-22. Loop Power Volumetric Flowmeter Junction Box............... 2-24
2-23. Loop Power Mass Flowmeter Junction Box......................... 2-25
2-24. AC Wiring Terminals........................................................... 2-26
2-25. AC Power Connections......................................................... 2-26
2-26. DC Wiring Terminals........................................................... 2-27
2-27. DC Power Connections......................................................... 2-27
2-28. Load Resistance Versus Input Voltage................................. 2-28
2-29. Isolated 4-20 Output Using External Power Supply............. 2-28
2-30. Non-Isolated 4-20 Output Using Input Power Supply..........2-29
2-31. Isolated 4-20 Output Using Meter Power Supply (AC only)2-29
2-32. Isolated Frequency Output Using External Power Supply...2-30
2-33. Non-Isolated Frequency Output Using Input Power Supply 2-30
2-34. Isolated Freq. Out. Using Meter Power Sup. (AC only)....... 2-30
2-35. Isolated Pulse Output Using External Power Supply ...........2-31
2-36. Non-Isolated Pulse Output Using Input Power Supply ........2-31
2-37. Isolated Pulse Output Using Meter Power Sup. (AC only) ..2-31
2-38. Isolated Alarm Output Using External Power Supply..........2-32
2-39 Non-Isolated Alarm Output Using Meter Power Supply...... 2-32
2-40 Isolated Alarm Output Using Meter Power Sup. (AC only) 2-33
2-41 High Power Flow Meter Junction Box ................................2-33
2-42. Optional Energy EMS RTD Input Wiring............................ 2-34
2-43. External 4-20 mA Input Wiring – External Power Supply...2-35
2-44. External 4-20 mA Input Wiring – DC Powered Meter.........2-35
2-45. External 4-20 mA Input Wiring – AC Powered Meter.........2-36
2-46. Optional External Contact Closure Input Wiring .................2-36
3-1. Flow Meter Display/Keypad...................................................3-1
4-1. Loop Powered Meter Wiring (HART).................................... 4-1
4-2. DC Powered Meter Wiring (HART) ......................................4-2
4-3. AC Powered Meter Wiring (HART) ......................................4-2
4-4. RS-485 Wiring (MODBUS)...................................................4-7
5-1. Electronics Stack Sensor Connections..................................5-11
5-2. Remote Feed Through Board Sensor Connections...............5-11
5-3. Vortex Sensor Connector......................................................5-12
5-4. Temperature Sensor Connector ............................................5-13
5-5. Pressure Sensor Connector ...................................................5-13
2-1. Minimum Recommended Stud Bolt Lengths .........................2-3
4-1. Byte Order (MODBUS)..........................................................4-9
4-2. Register Definitions (MODBUS) .........................................4-11
The VorTek Instruments’ Series M22 In-Line and the Series M23 Inser-
tion Pro-V™ Vortex Flow Meters provide a reliable solution for process
flow measurement. From a single entry point in the pipeline, Pro-V me-
ters offer precise measurements of mass or volumetric flow rates.
Mass flow meters utilize three primary sensing elements: a vortex shed-
ding velocity sensor, an RTD temperature sensor, and a solid state pres-
sure sensor to measure the mass flow rate of gases, liquids, and steam.
Meters are available as loop powered devices or with up to three 4-20
mA analog output signals for monitoring your choice of the five process
variables (mass flow, volumetric flow, temperature, pressure and fluid
density). The Energy Monitoring option permits real-time calculation of
energy consumption for a facility or process.
The primary sensing element of a volumetric flow meter is a vortex
shedding velocity sensor. Meters are loop powered. The analog 4-20
mA output signal offers your choice of volumetric or mass flow rate.
Mass flow rate is based on a constant value for fluid density stored in the
instrument’s memory.
Both the mass and volumetric flow meters can be ordered with a local
keypad/display which provides instantaneous flow rate, total, and process
parameters in engineering units. A pulse output signal for remote totali-
zation and MODBUS or HART communications are also available. Pro-
V digital electronics allows for easy reconfiguration for most gases, liq-
uids and steam. The VorTek Series M22 and M23 Pro-V Meters’ simple
installation combines with an easy-to-use interface that provides quick
set up, long term reliability and accurate mass flow measurement over a
wide range of flows, pressures and temperatures.
This manual provides information needed to install and operate both the
Series M22 In-Line and Series M23 Insertion Pro-V Flow Meters.
•Chapter 1 includes the introduction and product description
•Chapter 2 provides information needed for installation
•Chapter 3 describes system operation and programming
•Chapter 4 provides information on HART and MODBUS protocols
•Chapter 5 covers troubleshooting and repair
Appendix A - Product Specifications, Appendix B – Approvals,
Appendix C – Flow Meter Calculations, Appendix D – Glossary of
Terms
We use note, caution and warning statements throughout this book to
draw your attention to important information.
When receiving a VorTek mass flow meter, carefully check the outside
packing carton for damage incurred in shipment. If the carton is dam-
aged, notify the local carrier and submit a report to the factory or distrib-
utor. Remove the packing slip and check that all ordered components are
present. Make sure any spare parts or accessories are not discarded with
the packing material. Do not return any equipment to the factory without
first contacting VorTek Customer Service.
If you encounter a problem with your flow meter, review the configura-
tion information for each step of the installation, operation and set up pro-
cedures. Verify that your settings and adjustments are consistent with fac-
tory recommendations. Refer to Chapter 5, Troubleshooting, for specific
information and recommendations.
If the problem persists after following the troubleshooting procedures
outlined in Chapter 5, contact VorTek Instruments, Technical Support at
(888) 386-7835 or (303) 682-9999 between 8:00 a.m. and 5:00 p.m.
MST. When calling Technical Support, have the following information
on hand:
•the serial number and VorTek order number (all marked on
the meter nameplate)
•the problem you are encountering and any corrective action
taken
•application information (fluid, pressure, temperature and
piping configuration)
VorTek Series M22 and M23 Pro-V™ Multi-Parameter Vortex Mass
Flow Meters use a unique sensor head to monitor mass flow rate by di-
rectly measuring three variables–fluid velocity, temperature and pres-
sure. The built-in flow computer calculates the mass flow rate and volu-
metric flow rate based on these three direct measurements. The velocity,
temperature and pressure sensing head is built into the vortex meter’s
flow body. To measure fluid velocity, the flow meter incorporates a bluff
body (shedder bar) in the flow stream and measures the frequency of vor-
tices created by the shedder bar. Temperature is measured using a plati-
num resistance temperature detector (PRTD). Pressure measurement is
achieved using a solid-state pressure transducer. All three elements are
combined into an integrated sensor head assembly located downstream
of the shedder bar within the flow body.
The Pro-V vortex velocity sensor is a patented mechanical design that mi-
nimizes the effects of pipeline vibration and pump noise, both of which
are common error sources in flow measurement with vortex flow meters.
The velocity measurement is based on the well-known Von Karman vor-
tex shedding phenomenon. Vortices are shed from a shedder bar, and the
vortex velocity sensor located downstream of the shedder bar senses the
passage of these vortices. This method of velocity measurement has many
advantages including inherent linearity, high turndown, reliability and
simplicity.
Von Karman vortices form downstream of a shedder bar into two distinct
wakes. The vortices of one wake rotate clockwise while those of the oth-
er wake rotate counterclockwise. Vortices generate one at a time, alter-
nating from the left side to the right side of the shedder bar. Vortices in-
teract with their surrounding space by over-powering every other nearby
swirl on the verge of development. Close to the shedder bar, the distance
(or wave length) between vortices is always constant and measurable.
Therefore, the volume encompassed by each vortex remains constant, as
shown below. By sensing the number of vortices passing by the velocity
sensor, the Pro-V™ Flow Meter computes the total fluid volume.
The velocity sensor incorporates a piezoelectric element that senses the
vortex frequency. This element detects the alternating lift forces pro-
duced by the Von Karman vortices flowing downstream of the vortex
shedder bar. The alternating electric charge generated by the piezoelec-
tric element is processed by the transmitter’s electronic circuit to obtain
the vortex shedding frequency. The piezoelectric element is highly sensi-
tive and operates over a wide range of flows, pressures and temperatures.
Vortex shedder bar
Flow
Vortices
Velocity sensor
Constant
wave length
Re =
ρV D
µ
St =
f d
V
To ensure trouble-free operation, vortex flow meters must be correctly
sized so that the flow velocity range through the meter lies within the
measurable velocity range (with acceptable pressure drop) and the linear
range.
The measurable range is defined by the minimum and maximum velocity
using the following table.
Gas
Liquid
Vmin
25
ρ
ft/s
1 ft/s
English
ρ
(lb/ft
3
)
Vmax 300 ft/s 30 ft/s
Vmin
37
ρ
m/s
0.3 m/s
Metric
ρ
(kg/m
3
)
Vmax 91 m/s 9.1 m/s
The pressure drop for series M23 insertion meters is negligible. The pressure drop
for series M22 in-line meters is defined as:
∆P = .00024 ρV
2
English units (∆P in psi, ρin lb/ft
3
, V in ft/sec)
∆P = .000011 ρV
2
Metric units (∆P in bar, ρin kg/m
3
, V in m/sec)
The linear range is defined by the Reynolds number. The Reynolds number is the
ratio of the inertial forces to the viscous forces in a flowing fluid and is defined
as:
Where
Re = Reynolds Number
ρ= mass density of the fluid being measured
V = velocity of the fluid being measured
D = internal diameter of the flow channel
µ= viscosity of the fluid being measured
The Strouhal number is the other dimensionless number that quantifies the
vortex phenomenon. The Strouhal number is defined as:
Where
St = Strouhal Number
f = frequency of vortex shedding
d = shedder bar width
V = fluid velocity
As shown in Figure 1-3, Pro-V™ meters exhibit a constant Strouhal
number across a large range of Reynolds numbers, indicating a consis-
tent linear output over a wide range of flows and fluid types. Below this
linear range, the intelligent electronics in Pro-V automatically corrects
for the variation in the Strouhal number with the Reynolds number. The
meter’s smart electronics corrects for this non-linearity via its simultane-
ous measurements of the process fluid temperature and pressure. This da-
ta is then used to calculate the Reynolds number in real time. Pro-V me-
ters automatically correct down to a Reynolds number of 5,000.
Pro-V Flow Meters use a 1000 ohm platinum resistance temperature detec-
tor (PRTD) to measure fluid temperature.
Pro-V Flow Meters incorporate a solid-state pressure transducer isolated
by a 316 stainless steel diaphragm. The transducer itself is micro-
machined silicon, fabricated using integrated circuit processing technol-
ogy. A nine-point pressure/temperature calibration is performed on every
sensor. Digital compensation allows these transducers to operate within a
0.3% of full scale accuracy band within the entire ambient temperature
range of -40°F to 140°F (-40 to 60°C). Thermal isolation of the pressure
transducer ensures the same accuracy across the allowable process fluid
temperature range of -330°F to 750°F (-200 to 400°C).
0.3
0.2
0.1
0.0
34
10
Linear range
Reynolds Number, Re
Strouhal Number, St
10
5
10 10
8
10
6
10
7
5000
Corrected range
Pro-V™ Vortex Mass Flow Meters are available in two model
configurations:
•Series M22 in-line flow meter (replaces a section of the pipeline)
•Series M23 insertion flow meter (requires a “cold” tap or a “hot”
tap into an existing pipeline)
Both the in-line and insertion configurations are similar in that they both
use identical electronics and have similar sensor heads. Besides installa-
tion differences, the main difference between an in-line flow meter and
an insertion flow meter is their method of measurement.
For an in-line vortex flow meter, the shedder bar is located across the en-
tire diameter of the flow body. Thus, the entire pipeline flow is included
in the vortex formation and measurement. The sensing head, which di-
rectly measures velocity, temperature and pressure is located just down-
stream of the shedder bar.
Insertion vortex flow meters have a shedder bar located across the di-
ameter of a short tube. The velocity, temperature and pressure sensor are
located within this tube just downstream of a built-in shedder bar. This
entire assembly is called the insertion sensing head. It fits through any
entry port with a 1.875 inch minimum internal diameter.
The sensing head of an insertion vortex flow meter directly monitors the
velocity at a point in the cross-sectional area of a pipe, duct, or stack (re-
ferred to as “channels”). The velocity at a point in the pipe varies as a func-
tion of the Reynolds number. The insertion vortex flow meter computes the
Reynolds number and then computes the total flow rate in the channel. The
output signal of insertion meters is the total flow rate in the channel. The
accuracy of the total flow rate computation depends on adherence to the
piping installation requirements given in Chapter 2. If adherence to those
guidelines cannot be met, contact the factory for specific installation ad-
vice.
The M22 or M23 models are available with the following options:
V, volumetric flowmeter; VT, velocity and temperature sensors; VTP,
velocity, temperature, and pressure sensors; VT-EM energy output op-
tions; VTP-EM, energy options with pressure; VT-EP, external pressure
transmitter input.
The M22 In-line model is built for line sizes ½through 4 inch wafer or ½
through 8 inch flanged design using ANSI 150, 300, 600, PN16, 40, or
64 class flanges.
The M23 Insertion model can be used in line sizes 2 inch and greater and
is built with a compression fitting or packing gland design using 2 inch
NPT, or 2 inch flanged connections (ANSI 150, 300, 600, PN16, 40, or
64 class flanges). The packing gland design can be ordered with a per-
manent or removable retractor.
The M22 In-line model can be built with A105 carbon steel, 316L stain-
less steel, or Hastelloy C-276. The M23 Insertion model can be built
with 316L stainless steel or Hastelloy C-276.
Pro-V Flow Meter electronics are available mounted directly to the flow
body, or remotely mounted. The electronics housing may be used indoors
or outdoors, including wet environments. Available input power options
are: DC loop powered (2-wire), DC powered, or AC powered. Three
analog output signals are available for your choice of three of the five
process variables: mass flow rate, volumetric flow rate, temperature,
pressure or fluid density. A pulse output signal for remote totalization
and MODBUS or HART communications are also available.
Pro-V Flow Meters include a local 2 x 16 character LCD display housed
within the enclosure. Local operation and reconfiguration is accom-
plished using six pushbuttons operated via finger touch. For hazardous
locations, the six buttons can be operated with the electronics enclosure
sealed using a hand-held magnet, thereby not compromising the integrity
of the hazardous location certification.
The electronics include nonvolatile memory that stores all configuration
information. The nonvolatile memory allows the flow meter to function
immediately upon power up, or after an interruption in power. All
flowmeters are calibrated and configured for the customer’s flow
application.
VorTek’s Pro-V Vortex Flow Meter installations are simple and
straightforward. Both the Series M22 In-Line and Series M23 Insertion
type flow meter installations are covered in this chapter. After reviewing
the installation requirements given below, see page 2-3 for Series M22 in-
stallation instructions. See page 2-6 for Series M23 installation instruc-
tions. Wiring instructions begin on page 2-20.
Before installing the flow meter, verify the installation site allows for
these considerations:
1. Line pressure and temperature will not exceed the flow meter
rating.
2. The location meets the required minimum number of pipe di-
ameters upstream and downstream of the sensor head as illu-
strated in Figure 2-1.
3. Safe and convenient access with adequate overhead clear-
ance for maintenance purposes.
4. Verify that the cable entry into the instrument meets the
specific standard required for hazardous area installations.
5. For remote installations, verify the supplied cable length is
sufficient to connect the flow meter sensor to the remote
electronics.
Also, before installation check your flow system for anomalies such as:
•leaks
•valves or restrictions in the flow path that could create distur-
bances in the flow profile that might cause unexpected flow rate
indications
2
Select an installation site that will minimize possible distortion in the flow
profile. Valves, elbows, control valves and other piping components may
cause flow disturbances. Check your specific piping condition against the
examples shown below. In order to achieve accurate and repeatable per-
formance install the flow meter using the recommended number of
straight run pipe diameters upstream and downstream of the sensor.
Note: For liquid applications in vertical pipes, avoid installing with flow
in the downward direction because the pipe may not be full at all points.
Choose to install the meter with flow in the upward direction if possible.
Minimum Required
Upstream Diameters Minimum Required
Downstream Diameters
NoFlow
Conditioner
With Flow Conditioner No Flow
Conditioner With Flow
Conditioner
Example A A C C´ B B
1 10 D N/A N/A N/A 5 D 5 D
2 15 D 10 D 5 D 5 D 5 D 5 D
3 25 D 10 D 5 D 5 D 10 D 5 D
4 10 D 10 D 5 D 5 D 5 D 5 D
5 20 D 10 D 5 D 5 D 5 D 5 D
6 25 D 10 D 5 D 5 D 10 D 5 D
D = Internal diameter of channel. N/A = Not applicable
Flow meter
AB
Example 1.
One 90°elbow before meter
C'
Flow meter
AB
C
Flow conditioner
(if used)
Example 2.
Two 90°elbows before meter in one plane
C'
Flow meter
AB
C
Flow conditioner
(if used)
Example 3.
Two 90°elbows before meter out of plane (if three
90°bends present, double recommended length)
Flow meter
AB
Example 4.
Reduction before meter
C' C
Flow conditioner
(if used)
Flow meter
AB
C' C
Flow conditioner
(if used)
Example 5.
Expansion before meter
Example 6.
Regulator or valve partially closed before meter
(If valve is always wide open, base length
requirements on fitting directly preceding it)
Flow meter
AB
C' C
Flow conditioner (if used)
Install the Series M22 In-Line Flow Meter between two conventional pipe
flanges as shown in Figures 2-3 and 2-4. Table 2-1 provides the recom-
mended minimum stud bolt lengths for wafer-style meter body size and
different flange ratings.
The meter inside diameter is equal to the same size nominal pipe ID in
schedule 80. For example, a 2” meter has an ID of 1.939” (2” schedule
80). Do not install the meter in a pipe with an inside diameter smaller
than the inside diameter of the meter. For schedule 160 and higher
pipe, a special meter is required. Consult the factory before purchasing
the meter.
Series M22 Meters require customer-supplied gaskets. When selecting
gasket material make sure that it is compatible with the process fluid and
pressure ratings of the specific installation. Verify that the inside diameter
of the gasket is larger than the inside diameter of the flow meter and adja-
cent piping. If the gasket material extends into the flow stream, it will dis-
turb the flow and cause inaccurate measurements.
Stud Bolt Lengths for Each Flange Rating (inches)
Line Size
Class 150
and PN16
Class 300
and PN40
Class
600
and PN64
1 inch 6.00 7.00 7.50
1.5 inch 6.25 8.50 9.00
2 inch 8.50 8.75 9.50
3 inch 9.00 10.00 10.50
4 inch 9.50 10.75 12.25
The required bolt load for sealing the gasket joint is affected by several
application-dependent factors, therefore the required torque for each ap-
plication may be different. Refer to the ASME Pressure Vessel Code
guidelines for bolt tightening standards.
1
2
34
1
2
34
5
67
8
15
9
3
7
11
2
6
10
4
8
12
4-bolt 8-bolt 12-bolt
4
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.
When installing the meter make sure the section marked with a flow arrow is
positioned upstream of the outlet, with the arrow head pointing in the direc-
tion 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 vor-
tex shedder bar and is correctly aligned to the flow. Installing the meter oppo-
site 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.
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