Kobold BGF Specifications

All-Metal Armored Variable Area

Flowmeter and Totalizer

for Horizontal or Vertical Mounting

measuring

•

monitoring

•

analyzing

BGF

●● Measuring Range:

0.044...0.44 to 26.4...264 (Water)

0.176...1.76 to 100...1000 SCFM (Air)

●● Accuracy: ± 2% of Full Scale

●● p

: 580 PSIG

max

(Option: up to 5,800 PSIG)

●● t

: -40 ... 390 °F

max

●● Connection: 1/2" ... 3" ANSI,

1/4"...2" NPT

●● Material: 316L /316-Ti Stainless

Steel, PTFE

●● Options:

Contacts, Analog Output with
HART®, Profibus®-PA, Foundation™
Fieldbus®, Totalizer Module

KOBOLD companies worldwide:

ARGENTINA, AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHILE, CHINA, COLOMBIA,
CZECH REPUBLIC, EGYPT, FRANCE, GERMANY, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA,
MEXICO, NETHERLANDS, PERU, POLAND, REPUBLIC OF KOREA, ROMANIA, SINGAPORE, SPAIN,
SWITZERLAND, TAIWAN, THAILAND, TUNISIA, TURKEY, UNITED KINGDOM, USA, VIETNAM

01/03-18-2019

KOBOLD Instruments, Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205

Main Ofce:

1.800.998.1020

1.412.788.4890
[e-mail]
www.koboldusa.com

All-Metal Armored Variable Area Flowmeter and Totalizer Model BGF

Description

The KOBOLD BGF metal-armored variable area flowmeter is ideal
for difficult applications requiring high pressure, high temperature
operation or low pressure loss. Its all-metal, armored design
is available in stainless steel or PTFE-clad stainless steel. This
flowmeter is unique in that its design employs a guided float and
spring return mechanism that allows the BGF to be installed into
both horizontal and vertical pipes. In standard configuration,
the flowmeter is a purely mechanical meter suited for water and
compressed gases in line sizes up to 3 inches. Electronic limit
switches and/or an analog flow transmitter may be added if
desired. Analog output is supplied standard with HART® protocol.
Profibus-PA® is also available as an option. Available switches
and analog outputs include those that operate via intrinsically
safe methods of protection and may be used in hazardous areas
where intrinsically safe installations are permitted. Foundation
Fieldbus® is also available as an option. Custom designs for
high pressure operation, special fittings and special materials of
construction are available upon request.

Special Advantages

●● Ideal for Difficult Operating Conditions

●● Can be Used for All Directions of Flow

●● A Large Spectrum of Wetted Materials

●● Magneto-resistive Signal Transmission

●● Special Design for High Pressure

and High Temperature Applications

Technical Details

Sensor
Wetted Materials

SS Meas. Body: 316 L / 316-Ti Stainless Steel,
316-Ti Spring
PTFE Meas. Body: Hastelloy C-22®, PTFE,
Special Materials on Request

Process Connection: ASME B16.5, NPT,
Other Connections on Request

Nominal Pressure: 580 PSIG, ASME Cl150 / 300
(Standard) (BGF-S)

230 PSIG, ASME Cl150
(Standard) (BGF-P)

Higher Pressures Upon Request
(Max. 5800 PSIG)

Process Temperature: -40...300 °F
(BGF-S with Electrical Output)

-40...390 °F
(BGF-S without Electrical Output)

-40...390 °F
(BGF-S with Option V / H / W)

-40...257 °F (BGF-P)

Ambient Temperature: -40...176 °F

Accuracy

Liquid/Gas: ± 2 % of Full Scale

Additional Inaccuracy
by Transmitter (ES): ± 0.2 %

Repeatability: ± 0.8 % of Full Scale

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Protection: IP 65 (Aluminum Housing)
IP 67 (Stainless Steel Housing)

Certificate and Accreditation

Explosion Protection: BVS 03 ATEX H/B 112

Display

Material: Aluminum (Stove-Enameled)

Stainless Steel (as Option)

Electrical Outputs: Inductive Switch (Standard),
Inductive Switch (Safety Design),
Microswitch, Others on Request

Ambient Temperature: -40...176 °F (without Switch)

-40...150 °F (with Switch)

Transmitter

●• ES with HART

●• ES with HART

®

Protocol

®

Protocol and

2 NAMUR Switches

●• ES with HART

®

Protocol and

1 NAMUR Switch / 1 Pulse Output

●• ES with Profibus-PA

●• ES with HART

●• ES with Foundation Fieldbus

®

®

Protocol and Totalizer Module

®

Power Supply: 14 - 30 V

DC

Output: Passive, Galvanically Isolated

Current: 4-20 mA

Binary 1 and 2: Ui =30 V, Ii =20 mA, Pi = 100 mW

Input Binary: Counter Reset

(only for ES with Totalizer Module)

Ambient Temperature: -40...158 °F

Certification and Accreditation

Explosion Protection: DMT 00 ATEX E 075

Type of Protection: II 2G EEx ia IIC T6

No responsibility taken for errors;

subject to change without prior notice.

All-Metal Armored Variable Area Flowmeter and Totalizer Model BGF

Order Details for DN15 Models: (Example: BGF-S15 201R H KO0 0 S1 0 0K)

DN15 Models

Measuring Ranges: 0.044...0.44 GPM to 0.264...2.64 GPM

Model

Measuring Tube

Material

Connection

Measuring Range*

Code Water Air

Part

Number

Continued

..S15.. = Stainless Steel,

Process Temp.
≤ 390 °F

..201R2).. = 1/2" Class 150 RF ASME

..221R2).. = 1/2" Class 300 RF ASME

..202R.. = 3/4" Class 150 RF ASME

..222R.. = 3/4" Class 300 RF ASME

..H.. 0.044..0.44 GPM 0.176...1.76 SCFM

..I.. 0.071...0.71 GPM 0.294...2.71 SCFM

..203R.. = 1" Class 150 RF ASME

..P15.. = Stainless Steel

BGF-..

Measuring Tube,
PTFE-Lining,
Process Temp.
≤ 257 °F,
Max. Pressure
230 PSIG

*Reference Conditions: Water at 68 °F @1 mPas, Air at 68 °F @ 0 PSIG (Range Values for Other Media Upon Request)

1)

NPT floats can not be removed

2)

Not for BGF-P PTFE Models

..223R.. = 1" Class 300 RF ASME

..204R2).. = 1-1/4" Class 150 RF ASME

..224R2).. = 1-1/4" Class 300 RF ASME

1)2)

..6010

.. = 1/4" NPT

1)2)

..6020

.. = 3/8" NPT

1)2)

..6030

.. = 1/2" NPT

1)2)

..6040

.. = 3/4" NPT

..J.. 0.11...1.1 GPM 0.412...4.12 SCFM

..K.. 0.176...1.76 GPM 0.589...5.88 SCFM

..L.. 0.264...2.64 GPM 1.0...10.0 SCFM

Order Details for DN25 Models: (Example: BGF-S25 202R M KO0 0 S1 0 0K)

DN25 Models

Measuring Ranges: 0.44...4.4 GPM to 1.76...17.6 GPM

Model

Measuring Tube

Material

Connection

Code Water Air

Measuring Range*

To

complete

part

number,
please go
directly to

order table
on page 6.

Part

Number

Continued

..202R3).. = 3/4" Class 150 RF ASME

..M.. 0.44...4.4 GPM 1.76...17.6 SCFM

..222R3).. = 3/4" Class 300 RF ASME

..S25.. = Stainless Steel,

Process Temp.
≤ 390 °F

..P25.. = Stainless Steel

BGF-..

Measuring Tube,
PTFE-Lining,
Process Temp.
≤ 257 °F,
Max. Pressure
230 PSIG

*Reference Conditions: Water at 68 °F @1 mPas, Air at 68 °F @ 0 PSIG (Range Values for Other Media Upon Request)

1)

NPT floats can not be removed

2)

Range not available for BGF-P (PTFE Casing), for BGF-S Only

3)

Not Available for BGF-P with PTFE Casing

No responsibility taken for errors;
subject to change without prior notice.

..203R.. = 1" Class 150 RF ASME

..223R.. = 1" Class 300 RF ASME

..204R3).. = 1-1/4" Class 150 RF ASME

..224R3).. = 1-1/4" Class 300 RF ASME

..205R3).. = 1-1/2" Class 150 RF ASME

..225R3).. = 1-1/2" Class 300 RF ASME

1)3)

..6010

.. = 1/4" NPT

1)3)

..6020

.. = 3/8" NPT

1)3)

..6030

.. = 1/2" NPT

1)3)

..6040

.. = 3/4" NPT

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..N.. 0.705...7.05 GPM 2.35...27.1 SCFM

..P.. 1.1...11 GPM 4.12...41.2 SCFM

..Q 2).. 1.76...17.6 GPM 6.47...64.7 SCFM

To

complete

part

number,
please go
directly to

order table
on page 6.

3

All-Metal Armored Variable Area Flowmeter and Totalizer Model BGF

Order Details for DN40 Models: (Example: BGF-S40 205R P KO0 0 S1 0 0K)

DN40 Models

Measuring Ranges: 1.1...11 GPM to 4.4...44 GPM

Model

BGF-..

Measuring Tube

Material

..S40.. = Stainless Steel,

Process Temp.
≤ 390 °F

Connection

..205R.. = 1-1/2" Class 150 RF ASME

..225R.. = 1-1/2" Class 300 RF ASME

..60401).. = 3/4" NPT

..60501).. = 1" NPT

..60601).. = 1-1/4" NPT

Measuring Range*

Code Water Air

..P.. 1.1...11 GPM 4.12...41.2 SCFM

..Q.. 1.76...17.6 GPM 6.47...64.7 SCFM

..R.. 2.64...26.4 GPM 10...100 SCFM

Part

Number

Continued

To

complete

part

number,
please go
directly to

order table
on page 6.

..S.. 4.4...44 GPM 17.0...170 SCFM

*Reference Conditions: Water at 68 °F @1 mPas, Air at 68 °F @ 0 PSIG (Range Values for Other Media Upon Request)

1)

NPT floats can not be removed

Order Details for DN50 Models: (Example: BGF-S50 206R Q KO0 0 S1 0 0K)

DN50 Models

Measuring Ranges: 1.76...17.6 GPM to 11...110 GPM

Model

BGF-..

Measuring Tube

Material

..S50.. = Stainless Steel,

Process Temp.
≤ 390 °F

..P50.. = Stainless Steel
Measuring Tube,
PTFE-Lining,
Process Temp.
≤ 257 °F,
Max. Pressure
230 PSIG

Connection

..206R.. = 2" Class 150 RF ASME

..226R.. = 2" Class 300 RF ASME

..207R2).. = 2-1/2" Class 150 RF ASME

..227R2).. = 2-1/2" Class 300 RF ASME

1)2)

..6060

..6070

..6080

.. = 1-1/4" NPT

1)2)

.. = 1-1/2" NPT

1)2)

.. = 2" NPT

Code Water Air

..Q.. 1.76...17.6 GPM 6.47...64.7 SCFM

..R.. 2.64...26.4 GPM 10...100 SCFM

..S.. 4.4...44 GPM 17.0...170 SCFM

..T.. 7.0...70 GPM 27.0...270 SCFM

..U.. 11...110 GPM 41...410 SCFM

Measuring Range*

Part

Number

Continued

To

complete

part

number,

please go

directly to

order table
on page 6.

*Reference Conditions: Water at 68 °F @1 mPas, Air at 68 °F @ 0 PSIG (Range Values for Other Media Upon Request)

1)

NPT floats can not be removed

2)

Not Available for BGF-P with PTFE Casing

4

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No responsibility taken for errors;

subject to change without prior notice.

All-Metal Armored Variable Area Flowmeter and Totalizer Model BGF

Order Details for DN80 Models: (Example: BGF-S80 208R T KO0 0 S1 0 0K)

DN80 Models

Measuring Ranges: 7.05...70.5 GPM to 26.42...264.2 GPM

Model

BGF-..

Measuring Tube

Material

..S80.. = Stainless Steel,

Process Temp.
≤ 390 °F

..P80.. = Stainless Steel
Measuring Tube,
PTFE-Lining,
Process Temp.
≤ 257 °F,
Max. Pressure
230 PSIG

Connection

..208R.. = 3" Class 150 RF ASME

..228R.. = 3" Class 300 RF ASME

Code Water Air

Measuring Range*

..T.. 7.0...70 GPM 27.0...270 SCFM

..U.. 11...110 GPM 41...410 SCFM

..V.. 17.6...176 GPM 64.7...647 SCFM

Part

Number

Continued

To

complete

part

number,
please go
directly to

order table
on page 6.

..W.. 26.4...264.2 GPM 100...1000 SCFM

*Reference Conditions: Water at 68 °F @1 mPas, Air at 68 °F @ 0 PSIG (Range Values for Other Media Upon Request)

No responsibility taken for errors;
subject to change without prior notice.

www.koboldusa.com

5

All-Metal Armored Variable Area Flowmeter and Totalizer Model BGF

Continuation of Order Details (Example: BGF-S80 208R T K O 0 0 S 1 0 0K)

Magnet Bearer

..K.. = PP1)

(to
176 °F,
from
DN 50)

..P.. = PTFE

(BGF-S
to
300 °F)
(BGF-P
to
257 °F)

..S.. = St.

Steel

1)

Flow

Direction

..O.. = Top to

Bottom

..L.. = Left

to Right

..R.. = Right

to Left

..U.. = Bottom

to Top

Heating1) /

Cooling

..0.. = without

..1.. = with

Heating,
Ermeto
12 mm

..3.. = with

Heating,
ANSI­Flange
½" Class
150

..4.. = with

Heating,
1/2" NPT

Certificates Display Scale

..S.. = Aluminum

..0.. = without

Certificate

..V.. = Aluminum,

Assembled at

..1.. = Certificate of

Compliance

Distance up
to 390 °F

with the Order

2.1

..2.. = Certificate of

Compliance
with the Order

2.2

..B.. = Inspection

Certificate
with Material
Certificate 3.1

..C.. = Inspection

Certificate
with Material
Certificate 3.2

..E.. = St. Steel

..H.. = St. Steel,

Assembled at
Distance up
to 390°F

..T..= Aluminum

with Pressure
Comp.

..W.. = Aluminum

with Pressure
Comp.,
Assembled
at Distance
up to 390 °F

Water

..1.. = %-Scale

..2.. = Measuring

Range

Media

..4.. = %-Scale

..5.. = Measuring

Range

..F2).. = Dual

Scale

**Please Specify
Media Data (See
Below)

Electrical

Output

..0.. = without

..1.. = 1 Inductive

Switch

..2.. = 2 Inductive

Switches

..C.. = 1 × Microswitch

..D.. = 2× Microswitches

..6.. = Transmitter ES

with HART®,
EEx ia, 4-20 mA,
SIL

..7.. = Transmitter ES

with HART®,
EEx ia, 4-20 mA
and 2 NAMUR­Switches, SIL

..8.. = Transmitter ES

with HART®, EEx
ia, 4-20 mA, 1
NAMUR Switch
and 1 Pulse
Output

..9.. = Electrical

Transmitter ES
with Profibus®­PA, EEx ia

..I.. = 4-20 mA with

HART® Totalizer
Module

..K.. = Electrical

Transmitters
ES with
Foundation™

®

Fieldbus

Accessories

..0K = without

..XK = Special

(Please
Spec.)

1)

Not for model BGF-P (PTFE-coating)

2)

Please specify ranges with units of measurement

*Additional Information Required for Order:

To ensure proper operation, this product requires a completed application guide form to be submitted with any order. Please refer to the
‘documentation’ tab on the bottom of the product page for this product on our website in order to obtain the correct form. You can also contact
your KOBOLD representative for this form.

6

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No responsibility taken for errors;

subject to change without prior notice.

Dimensions

A

A

155

1

5

5

2

5

0

A

A

1

9

6

2

5

0

Ø

All-Metal Armored Variable Area Flowmeter and Totalizer Model BGF

Aluminum Display

0
5
2

9.84" (11.81" for NPT Fittings)

Stainless Steel Display

*5.71"

145*

2.76"

70

3
5
1

6.02"

5
5
1

6.10"

0
5
2

,4
7
4

1.87"

9.84" (11.81" for NPT Fittings)

6.10"

155

Øl.W.

*6.22"

158*

3.19"

81

6

0

9

5

1

2

Ø

Ø 7.72"

9.84" (11.81" for NPT Fittings)

Size ANSI I. W. (Inner Width)

1/2" 150/300 1.02" 2.91" 3.94"

1" 150/300 1.26" 3.03" 4.06"

1-1/2" 150/300 1.81" 3.35" 4.33"

2" 150/300 2.76" 3.86" 4.84"

3" 150/300 4.02" 4.49" 5.51"

Dimensional Deviations:
* + 3.94" with forward advanced display

3
5
1

6.02"

0
5
2

8
6

2.68"

9.84" (11.81" for NPT Fittings)

Øl.W.

A

Aluminum Display Stainless Steel Display

No responsibility taken for errors;
subject to change without prior notice.

www.koboldusa.com

7