Ellipse® Pitot Tube Meter
BHR Annular Wet Tap with Safety Chain Meter
PTT-UM-00517-EN-02 (April 2014)
User Manual
Ellipse® Pitot Tube Meter, BHR Annular Wet Tap with Safety Chain 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
Page ii April 2014
INTRODUCTION
The Preso patented 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 BHR comes
with instrument shutoff valves that can be plumbed to a transmitter or direct
indicating gauge.
User Manual
True static
sensing holes
Impact velocity
sensing holes
Figure 1: BHR pressure sensing holes
SPECIFICATIONS
Applications Liquids and gases
Pipe Sizes 2…24 inches (50…610 mm)
Pressure 75 psi (517 kPa) maximum
Temperature 120° F (49° C) maximum
Accuracy ±0.75% of reading
Turndown Ratio 17:1 with no vacuum effect
Standard Components Y-type head, brass 1/8" FNPT connection
Sensor connection:
2"…5", Ellipse 1/2"; 3/4" Brass compression fitting with SS ferrule
6"…12", Ellipse 7/8"; 1" Brass compression fitting with SS ferrule
14"…24", Ellipse 1-1/4"; 1-1/4" Brass compression fitting with SS ferrule
CS 3000 lb thread fitting – ASTM A105
316/316L SS Ellipse sensor
Instrument valves (2 per sensor) – 1/4" SAE flare brass ball type
Polycarbonate ID tag with wire
Bronze isolation ball valve
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
W
Ellipse® Pitot Tube Meter, BHR Annular Wet Tap with Safety Chain Meter
PIPE ORIENTATION AND SENSOR MOUNTING
L
H
Field Weld
Field Weld
FLOW
FLOW
Or Sideways
as on
Vertical Pipes
H
L
Liquid
5° Max.
F
L
O
5° Max.
W
O
Air, Gas or Liquid
Figure 2: Horizontal pipe installation
O
F
L
W
Field Weld
F
L
OR
Liquid, Air and Gas
OTE:N Illustration represents installation for downward flow.
Figure 3: Vertical pipe installation
Page 4 April 2014
User Manual
INSTALLATION INSTRUCTIONS, SINGLE SUPPORT
1. Choose the proper location to install the BHR Ellipse using AGA/ASME standards (or equivalent). See "Location Instructions"
on page 7.
2. Grind the surface of the pipe where the BHR 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. Install the close (short) nipple by threading it into the weld connector. Install the supplied three-piece isolating ball valve.
5. Mount the high pressure drilling machine onto the ball valve. Open the ball valve. Drill a hole through the pipe wall
according to Table 2.
Pipe Size Model / Sensor Weld Connector Drill Bit
2"…5" BHL (1/2") 3/4" 5/8"
6"…12" BHL (7/8") 1-1/4" 1-1/8"
14"…24" BHL (1-1/4") 1-1/2" 1-3/8"
Table 2: Single support drill bit size
OTE:N There is no need for a drilling machine if it is not a hot tap installation or if the system is not pressurized.
6. Remove the drill bit through the isolating ball valve. CLOSE the ball valve and dismantle the drilling machine. Make sure
there is no leakage at the valve and close nipple connections. The ball valve is to remain completely closed until step 10.
7. Thread the supplied cage (long) nipple into the isolating ball valve. Install the supplied reducer (1-1/4" × 1" coupling) on
the cage nipple.
8. Thread the supplied packing gland onto the reducer.
9. Install the instrument valves (optional) at the pressure connections on the BHR Ellipse sensor head. Make sure the valves
are FULLY CLOSED before proceeding.
10. Insert the BHR Ellipse through the packing gland and cage nipple until it reaches the isolating ball valve. Slightly tighten
the compression nut of the packing gland and attach the safety chain to the BHR Ellipse. Open the isolating ball valve and
push the sensor down by hand until it reaches the opposite side of the pipe.
THE BHR ELLIPSE MUST BE MANUALLY HELD IN ITS FULLY INSERTED POSITION UNTIL THE COMPRESSION NUT HAS
BEEN COMPLETELY TIGHTENED IN STEP 12 AND THE SAFETY CHAIN HAS BEEN PROPERLY ATTACHED.
11. While holding the BHR Ellipse in its fully inserted position, align the arrow on the sensor head with the direction of ow.
See Figure 4 on page 6.
12. Completely tighten the packing gland in order to prevent leakage.
13. Connect the instrument lines to the sensor head valves. Connect these lines to a gage or transmitter.
Page 5 April 2014
Ellipse® Pitot Tube Meter, BHR Annular Wet Tap with Safety Chain Meter
H
L
H
Field Weld
Figure 4: Sensor alignment
INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT
L
1. Follow steps 1 through 10 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.
Pipe Size Model / Sensor Weld Connector Drill Bit
2"…5" BHR (7/16") 1/2" 3/8"
6"…12" BHRL (7/8") 1/2" 1/2"
14"…24" BHR (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 BHR Ellipse sensor through the two holes. Make sure that the double support pin passes through the guide ring.
See Figure 5.
Ellipse Sensor
Double Support Pin
Guide Ring
Figure 5: Double support pin
4. Align the arrow located on the sensor head in the direction of ow as in step 11, “Installation Instructions, Single Support”
on page 5.
5. Check that the BHR Ellipse is in the correct orientation and spans the inside of the pipe. Tighten the compression nut
manually, then use a wrench to tighten it an additional 1-1/4 turns.
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.
TYPICAL INSTALLATION ORIENTATION
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 6: 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
80
90
70
60
50
40
30
20
O
2
10
9
8
7
6
5
4
3
Figure 7: 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
The Americas | Badger Meter | 4545 West Brown Deer Rd | PO Box 245036 | Milwaukee, WI 53224-9536 | 800-876-3837 | 414-355-0400
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