BEST COST EFFECTIVE FLOW MEASUREMENTEVEN FOR LARGE SIZE LINES

O-100 Series®

GLASS TUBE TYPE ORIFLOMETER■ GENERAL
O-100 series ORIFLO METER is a flow meter consisting of a orificeplate and a GLASS TUBE type variable area flow meter. Since the flowrate is measured with a “small sized” flow meter set to a bypass piping, the flow measurement even for “large sized” lines can be economically conducted. In addition to the local indication type, alarm contact
version is also available.

■ STANDARD SPECIFICATIONDetection type

: Bypass orifice typeMeasuring fluid: Liquids (Viscosity : up to 3mPa·s)
and Gases(Not suitable for slurry and steam)Available tapping and sizes :1) D • D/2 taps (O-1■ ■ - ■P)
100mm to 500mm2) Corner taps (with orifice ring) (O-1■ ■ - ■C)
50mm to 500mm3) Flange taps (O-1■ ■ - ■F)
50mm to 500mm
4) Vena contracta taps (O-1■ ■ - ■V)
200mm to 500mm
Note : 550mm or more can be supplied on request.
Process connection: JIS5K/10K/20K, ANSI/JPI CLASS■ MODEL CODE

150/300 and Others.
Temperature of liquid: Max. 120°C

Model code
Description*: It is general data, and the maxiO-

mum temperature may change byterms of use and environment.
Allowable thermal shock: 80°C

Fluid pressure: Max. 1.0MPa

10Local indication only

75

Local indication with alarm
contact

Function

Indication accuracy: ⫾3% F.S.

Paint color: Munsell 7.5BG4/1.5 (Body made of SUS

1–

Bottom to top

6–

Left to right

7–

Right to left

8–

Top to bottom

not painted)
Function :O-10 ■ - ■ ■ Local indication only

Flow direction ofmain pipeO-75 ■ - ■ ■ Local indication with alarm contact: Refer to ■ MATERIAL AND SCOPE OF

Material

SUPPLY for details.
Standard DP/Scale range
Range ability (standard) 10 : 2
Float material
Standard

Stainless steel
Aluminum
PTFE
PVC

A

Above main pipie

B

Below main pipie

Position of indicatorStandard DP (kPa)
Liquids
Gases
30——
1015
1015—

P

D • D/2 TapsC

Corner taps ✽2(With orifice ring)F

Flange taps

V

Vena contracta taps

Type of tapping✽1

Custom-made meter available for more than the above DP.
In case of custom-made meter, effective scale range is to be different.
Refer to the maximum flow range by size, or contact us.

✽ 1 : Available sizes for types of tapping is to be referred to ■ STANDARD

SPECIFICATIONS.
✽ 2 : Orifice rings are included in scope of supply as standard.

TG-F705-4E

NOV. 2002K

TG-F705-10E

MAY. 2014K

O-100 Series ORIFLOMETER®

■ CAPACITY OF EACH LINE SIZE
❏ FOR LIQUID APPLICTIONS
Main pipe size (mm)

★

1★
2
★
3★
4

Flow rate Water m3/h（Density 1.0g/cm3, Viscosity 1.0mPa·S）★

★

1DP15kP2DP30kP

3

DP

60kP

to14

1. 6

to16

2. 5

to25

3. 5

to35

65

1. 6

to20

2

to25

3

to40

4

to50

80

2. 5

to30

3

to40

4

to50

6

to80

100

3. 5

to50

4. 5

to70

7

to90

9

to140

125

6

to80

7

to100

10

to150

14

to200

150

8

to120

10

to150

14

to200

20

to300

200

14

to200

16

to250

25

to350

35

to500

250

20

to300

25

to400

35

to500

50

to800

300

30

to450

35

to500

50

to800

70

to1000

350

40

to500

45

to700

70

to100090to1400

400

50

to700

60

to900

90

to1200120

to180045060to100080

to1200120

to1600150

to2000450080to120090

to1500140

to2000180

to3000★

Resin float (PVC, PTFE), and range ability 10:2.5
Resin float (PVC, PTFE), and range ability 10:2Range ability 10:2 [Resin float (PVC, PTFE), and range ability: Available up to 10:1.5]
SUS float, and range ability 10:2 (Available up to 10:1.5)｡
Flow rate Air m3/h（nor）（0 C, 1atm）

Main pipe size (mm)

1
★
2
★
3

★

10kP

1. 4

❏ FOR GAS APPLICTIONS★

★

DP50DP

5kP5025

to65

2980

40

★

1DP10kP

280

34

to460

to650

★

2DP

20kP

to380

46

to339

to630

54

to850

55

to900

75

to1200

520

100

67

to110093

to1500130

to2000125110to1600150

to2300200

to3100150150to2300200

to3300280

to4400200

250

to4100350

to5700480

to7800250

390

to6400540

to8800740

to12000300

550

to9200770

to12000

1100

to17000

350

690

to11000950

to15000

1400

to21000

400

900

to15000

1300

to200001800

to28000

450

1200

to19000

1600

to26000

2300

to36000

500

1500

to23000

2000

to330002800

to45000

Range ability 10:2.5
Range ability 10:2Range ability 10:2 (Available up to 10:1.5)

The maximum flow rate of flowmeter can be specified in the above
mentioned POSSIBLE SCALE RANGE.
NOTE
1 : Above table are based on the fact that the material of main pipe is
SGP (Carbon steel pipes for ordinary pipes JIS G 3452). The maximum flow rate of the main pipes other than SGP are determined bymultiplying above figures by the value equal to (actual inside diameter/SGP inside diameter)2

3. Airflow indicates the maximum measurable flow range based on0℃, 1 atm. When operating conditions are different, refer to theabove table after calculating flow rate converted to air by thefollowing formula.

ＱＡ＝Ｑ⫻Ｃγ⫻Ｃｔ⫻Ｃｐto above figures.
2 : Above table is applicable for measurement of Water (Density
1.0g/cm3, Viscosity 1.0mPa·s).
When measuring liquid whose density is not 1.0g/cm3, refer to theabove table after calculating flow rate converted to air by thefollowing formula.

Ｑｗ＝Ｑ ⫻ γｏ (γｆ⫺ 1) / (γｆ⫺γｏ)
Qw：Flow rate converted to water

Material

Q ：Flow rate of actual fluid

Stainlessγo ：Density of actual fluidPTFE

γf ：Density of float

PVC

QA：Flow rate converted to air
Q ：Flow rate of actual fluid
Cγ：Density conversion factor

Ｃγ＝ γ /1.293
γ：Gaseous density [kg/m3(nor)]
Cｔ：Temperature conversion factor

Density of float
7.9 g/cm3
2.2 g/cm3
2.5 g/cm3

Ｃｔ＝ ( 273 ⫹ｔ) /273
ｔ：Temperature for actual fluid [℃]
Cｐ：Pressure conversion factor

Ｃｐ＝0.1013/(0.1013⫹ｐ)ｐ：Pressure for actual fluid [MPa]2TOKYO KEISO CO., LTD.

TG-F705-10E

O-100 Series ORIFLOMETER®

■ FLOW DIRECTION AND BYPASS PIPING
O−1□6−BC

O−1□6−ACO−1□7−BC

O−1□7−ACO−1□1−BC

O−1□1−ACO−1□8−BC

O−1□8−AC

Above drawings show the case of corner tapping. The same piping configurations are applied also for other types of tappings.

TG-F705-10E

TOKYO KEISO CO., LTD.

3

O-100 Series ORIFLOMETER®

■ STANDARD SIZES OF BYPSS PIPING (In case of Flange rating JIS10K)(2) D • D/2 Taps

(1) Corner taps (With orifice ring)❏ Horizontal piping❏ Horizontal piping
L1(L 2)(102)

L1 t L2

(L4)

(600)

(750)

φDφDA

φ 16

A detail drawing

Rc 1/2
L3(130)❏ Vertical piping (Bottom to top)

(L 4)

(100)

(102)

φD

L1 t L2
L3

φDL1(L 2)❏ Vertical piping (Bottom to top)

(600)

(760)

A

100

Main pipe size

L1L2

Main pipe size

50mm

68

125

50mm

L1L2tL3

L4

65mm

68

135

65mm

80mm

68

140

80mm

100mm

71

150

100mm

125mm

71

102

47

9

158

110

165

125mm

128

59

9

196

150mm

130

71

180150mm

152

71

10233

150200mm

71

205

200mm

202

95

10307

170

250mm

71

245

250mm

251

119

11381

210

300mm

71

265

300mm

302

14411457

230350mm

71290

350mm

337

16211510

250

400mm

71

325

400mm

388

18612586

280

450mm

71355

450mm

438

21212662

310

500mm

71

380500mm

489

237

12738

The dimensions L1 include gasket thickness:
t1.5mm x 2pcs for 50mm, 65mm, 80mm andt3mm x 2pcs for 100mm or larger.

unit : mm

350

L1 includes thickness of gaskets. t3 x 2pcs
L1 and L2 are for SGP piping.
For other piping material;
L1=1D – 3, L2=1/2D – (t – 3) where D=Pipe inside dimeter

unit : mm■ SUGGESTIONS FOR INSTALLATION
1. Upper/lower straight tube length
In order to make measurement in the predeterminedaccuracy, the straight run of tube is required. The required
straight run of tube varies, depending on the diameter
ratio of contraction device and the piping shape. Refer toJIS Z 8762-2: 2007.
2. Since the pressure loss within the bypass pipe is precalculated, doa specified bypass piping in accordance with the related approvaldrawing.
3. If you need bypass pipes of which sizes are different from thoseof standard ones due to a piping design in your factory, pleasecontact us.
4TOKYO KEISO CO., LTD.

The straight run of pipe varies, depending on the piping
condition and the contraction ratio of diameter, and thefollowing is just the outline.
[Reference]Elbow • Tees Valve (Gate valve fully opened)
Straight run of pipe
(Upstream)
Straight run of pipe
(Downstream)

10D

12D

4D

4D

• ‘D’ stands for the inside diameter of pipe
• Straight run of pipe means the length from the upstream face of orifice plate.

TG-F705-10E

O-100 Series ORIFLOMETER®

■ MATERIAL AND SCOPE OF SUPPLY
145316432124362671010107789<Corner taps>

Parts name①Main pipe
Except flange taps
Orifice flange
Flange taps
Flange gasket
Main orifice
Orifice ring
Ball valve
Bypass piping
Bypass orifice
GasketIndicator③④⑤⑥⑦⑧⑨⑩899<D·D/2 Taps and vena contracta taps>

No.

②8

<Flange taps>

Material
２
Costomer's supply
Costomer's supply (Optionally available)
SUS 304
S25C or SFVC2A
Costomer's supply (Optionally available)
SUS 304
SUS 304
SS 400
SUS 304
SCS 14A
C3771BESUS 304
SGP or STPGSUS 304
SUS 304
For Liguids : Non Asbestos, For Gas : NBR or FPM
SCS14/SUS 304
SCS14／SS400
１３

SUS 316
SUS 316
SUS 316
SCS 14A
SUS 316
SUS 316

SCS14/SUS 316* Gaskets between Main pipe orifice (or Orifice ring) and piping flanges as well as bolts and nuts for installation are customer's scope of supply
unless otherwise specified.

■ ORDERING INFORMATION
O-10■ - ■ ■ModelCautions on the use of glass tube variable area flowmetersO-75■ - ■ ■CAUTION

Fluid nameDensity

Avoid the use of glass tube variable area flowmeters for the following

Viscosityservices.

PressureTemperature

1. Liquid services subject to impulse pressure in the process.

Measuring range
Material class■ Class 1■ Class 3

Size_____ mm■ Class 2■ Special (2. Secondary accidents might occur due to the breakage of glass insuch services :)Process connection _________■ SGP

Main pipe Material• Explosive fluids

sch No. ________■ Stainless Steel Pipe sch No. _________

3. Gas handling process where breakage of glass might result in gas■ Lining Pipe (ID __________ mm)

4. The installation places of the flowmeters where breakage of glass■ PVC (■ VP■ VU)■ STPY (t ________ mm)(Alarm version)• Flammable fluids■ STPG,STPT■ Others(OD ___________ mm, ID ___________ mm)

For O-75■-■■• Toxic fluids such as poisons, stimulant and narcotics■ Low
Type of alarm ■ High______________
Setting point

leakage or scattering of glass fragments.
might be caused by the accidents from the surrounding piping orequipment.
5. On-off operation where breakage of glass might be caused by thecollision of the float inside meter due to the abrupt change of flow.
6. Services where the heat shock by abrupt change of temperature isexpected.

* Specification is subject to change without notice.

Head Office : Shiba Toho Building, 1 – 7 – 24 Shibakoen, Minato-ku, Tokyo 105 – 8558
Tel : +81-3 – 3431 – 1625 (KEY) ; Fax : +81-3 – 3433 – 4922
e-mail : overseas.sales@tokyokeiso.co.jp ; URL : http://www.tokyokeiso.co.jp
TG-F705-10E

TOKYO KEISO CO., LTD.

5