Ellipse® Pitot Tube Meter
AR Annular Regular Meter
FLOW METERS
DEBITMETERS
MEDIDOR DE FLUJO
PTT-UM-00521-EN-02 (April 2014)
User Manual
Ellipse® Pitot Tube Meter, AR Annular Regular Meter
CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pipe Orientation and Sensor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation Instructions, Single Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Instructions, Double Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Location Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Flow Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Page ii April 2014
INTRODUCTION
The Preso elliptical design outperforms and provides greater accuracy than
traditional differential pressure flow measurement devices. This differential
pressure flow meter is designed with a series of ports facing the upstream
velocity pressures, as well as flow sensing ports strategically located ahead of
the trailing edge flow separation.
The multi-ported, self-averaging flow element consists of an elliptical shape
with two independent flow sensing chambers. The impact velocity sensing
holes (high pressure) are located along the leading edge and the true static
sensing holes (low pressure) are on the exterior probe side. Model AR comes
with instrument shutoff valves with provisions to accept a transmitter or direct
indicating meter.
User Manual
True static
sensing holes
Impact velocity
sensing holes
Figure 1: AR pressure sensing holes
SPECIFICATIONS
Applications Liquids and gases
Pipe Sizes 2…72 inches (50…1820 mm)
Pressure 800 psi (5515 kPa) maximum
Temperature 800° F (426° C) maximum
Accuracy ±0.75% of reading
Turndown Ratio 17:1 with no vacuum effect
Standard Components T-type head, 316 SS 1/4" or 1/2" FNPT connection
CS compression fitting with SS ferrule
CS 3000 lb weld fitting, ASTM A105
316/316L SS Ellipse sensor
Instrument valves (2 per sensor), 1/4", CS
316 SS ID tag with wire
Reynolds Number Greater than 75,000 maintains most accurate flow measurements
Less than 75,000 consult factory for estimated results
Resonance If greater than 0.8, use double support
Table 1: Specifications
Page 3 April 2014
5° Max.
5° Max.
F
L
O
W
Ellipse® Pitot Tube Meter, AR Annular Regular Meter
PIPE ORIENTATION AND SENSOR MOUNTING
Field Weld
Field Weld
FLOW
F
L
O
W
FLOW
OR
Air and Gas Liquid
Figure 2: Horizontal pipe installation
F
L
O
W
Field Weld
5° Max.
F
L
W
O
5° Max.
OTE:N Illustration represents installation for downward flow.
Figure 3: Vertical pipe installation Figure 4: Probe alignment
OTE:N For sensors with transmitter mount head, see the Ellipse Pitot Tube Meter AR-TT3 User Manual.
Page 4 April 2014
Field Weld
FLOW
FLOW
H L
H L
User Manual
INSTALLATION INSTRUCTIONS, SINGLE SUPPORT
1. Choose the proper location to install the AR Ellipse using AGA/ASME standards (or equivalent). See "Preso Ellipse Location
Instructions" on page 7.
2. Grind the surface of the pipe where the AR Ellipse is to be inserted to provide a clean area for welding.
3. Weld the supplied thread-o-let to the pipe using standard codes for your application (1/16" weld gap recommended). Take
care to protect the threads during the welding process.
4. Drill a hole through the pipe wall according to Table 2.
Model / Sensor Weld Connector Drill Bit
AR0 (1/2") 1/2" 5/8"
AR (7/8") 1" 1-1/8"
AR1 (1-1/4") 1-1/4" 1-3/8"
Table 2: Single support drill bit size
5. Deburr the hole just drilled, especially on the inside of the pipe.
6. Assemble the supplied compression tting as diagrammed in Figure 5. Thread the assembled compression tting into the
thread-o-let manually. With a wrench, tighten the body of the tting a further 1-1/4 turns taking care not to tighten the
compression nut.
7. Install the instrument valves (optional) at the AR Ellipse head connections. Ensure that the valves are FULLY CLOSED to
prevent them from leaking during startup.
8. Insert the AR Ellipse through the compression tting. Carefully push the sensor by hand further into the pipe until it
reaches the opposite wall.
9. While holding the AR Ellipse in its fully inserted position, align the arrow located on the sensor head with the direction of
ow. See Figure 6.
Nut
Insert
Thread nut loosely
onto body of the
compression tting
Install insert
as shown
Field Weld
H L
H L
FLOW
Body
Threaded portion
to be installed
into weld tting
on pipe
Figure 5: Compression fitting Figure 6: Sensor alignment
FLOW
10. Thoroughly tighten the compression nut in order to prevent leakage. After tightening the compression nut manually, turn
it a further 1-1/4 turns with a wrench.
Page 5 April 2014
Ellipse® Pitot Tube Meter, AR Annular Regular Meter
INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT
1. Follow steps 1 through 7 in "Installation Instructions, Single Support" on page 5. At 180° from and on the same plane
as the previously drilled hole, grind the surface of the pipe to provide a clean area for welding. Drill a hole and deburr,
especially on the inside of the pipe. The hole used for the double support should be sized according to Table 3.
MODEL / SENSOR WELD CONNECTOR DRILL BIT
AR0 (1/2") 1/8" 3/8"
AR (7/8") 1/2" 1/2"
AR1 (1-1/4") 1" 7/8"
Table 3: Double support drill bit size
2. Weld the double support thread-o-let making sure that it is centered with the drilled hole (1/16" weld gap recommended).
3. Install the AR Ellipse sensor through the two holes. Make sure that the double support pin passes through the guide ring.
See Figure 7.
Ellipse Sensor
Double Support Pin
Guide Ring
Figure 7: Double support pin
4. Align the arrow located on the sensor head in the direction of ow as in step 9, "Installation Instructions, Single Support" on
page 5.
5. Ensure that the AR Ellipse is in the correct orientation and spans the inside of the pipe. Tighten the compression nut
manually, then tighten it 1-1/4 turns more using a wrench.
6. Install the plug into the end of the double support thread-o-let. Tighten the plug to prevent leakage.
Page 6 April 2014
User Manual
LOCATION INSTRUCTIONS
Straight pipe requirements: Accuracy is affected by the piping configurations due to the disturbances of the flow profile. A
fully developed symmetrical flow profile is achieved with the minimum upstream and downstream recommended lengths.
DISTANCES ARE EXPRESSED IN
NUMBER OF NOMINAL PIPE DIAMETERS
THROTTLED VALVE OR REGULATOR TWO ELBOWS IN DIFFERENT PLANES
CHANGE IN PIPE SIZE TWO ELBOWS IN THE SAME PLANE
A SINGLE ELBOW
Figure 8: Location instructions
Page 7 April 2014
FLOW CURVE
ANNULAR ELLIPS
1
.9
.6
.5
.4
.3
12" 16" 20"
2 3 4 5 6 7 8 9 1
0
0
0
0
WATER 60° F
2 3 4 5 6 7 8 9 1
0
0
0
0
0
E
2" 2.5" 3.5"3" 4" 5" 6" 8" 10" 14" 18" 24" 30"
100
90
80
70
60
50
40
30
20
O
2
10
9
8
7
6
5
4
3
Figure 9: Flow curve
2 3 4 5 6 7 8 9 1
0
0
0
USGPM
2 3 4 5 6 7 8 9 1
0
0
0
2
∆P – INCHES OF H
.8
.7
.2
2 3 4 5 6 7 8 9 1
NOTE:
2" THRU 10" CURVES ARE FOR SCH. 40 PIPE
12" AND ABOVE ARE FOR SCH. STD. PIPE
1
Control. Manage. Optimize.
PRESO is a registered trademark of Badger Meter, Inc. Other trademarks appearing in this document are the property of their respective entities. Due to continuous research,
product improvements and enhancements, Badger Meter reserves the right to change product or system specications without notice, except to the extent an outstanding
contractual obligation exists. © 2014 Badger Meter, Inc. All rights reserved.
www.badgermeter.com
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