O3000 Series ORIFLOMETER®

TG-F1169-E00

2

TOKYO KEISO CO., LTD.

■ MAXIMUM FLOW RATE BY MAIN PIPE SIZE

Main pipe size

(JIS)

Flow rate of water in m

3/h

(density 1.0g/cm

3, viscosity 1.0 mPa·s)

Flow rate of air in m

3/h (normal) at 0°C, 1 atm

Diff. pressure: 30 kPa

Diff. pressure: 50 kPa

Diff. pressure: 40 kPa

Diff. pressure: 50 kPa

15A

1/2B

0.27

to

1.8

0.27

to

2.3

5.5

to

53

5.9

to

59

20A

3/4B

0.35

to

4

0.38

to

5.1

9

to

110

9.8

to

130

25A

1B

0.46

to

6.8

0.58

to

8.8

14

to

200

15

to

220

32A

1 1/4B

0.75

to

11

0.96

to

14

23

to

330

26

to

360

40A

1 1/2B

1

to

15

1.3

to

20

31

to

450

34

to

500

50A

2B

1.7

to

25

2.1

to

32

49

to

730

54

to

800

65A

2 1/2B

2.7

to

41

3.4

to

53

81

to

1200

89

to

1300

80A

3B

3.6

to

58

4.6

to

75

110

to

1700

120

to

1800

100A

4B

6

to

99

7.7

to

120

190

to

2900

210

to

3100

125A

5B

9.2

to

150

13

to

190

280

to

4500

310

to

4900

150A

6B

14

to

210

18

to

270

400

to

6300

440

to

6900

200A

8B

24

to

360

30

to

470

680

to

11000

750

to

11000

250A

10B

35

to

570

45

to

740

1100

to

16000

1200

to

18000

300A

12B

50

to

820

64

to

1000

1500

to

24000

1700

to

26000

The maximum flow range can be set within the range specified for each main pipe according to the size.

Note 1: The above values are based on the condition when an SGP pipe (JIS G 3452 Carbon steel pipes for ordinary piping) is used for the main

pipe. When using other pipes, multiply the above value by the value obtained by (inside diameter of pipe to be used

/ inside diameter of

SGP pipe)

2.

Inside diameter of SGP pipe

Main pipe size

50A

65A

80A

100A

125A

150A

200A

250A

300A

350A

400A

450A

500A

2B

2 1/2B

3B

4B

5B

6B

8B

10B

12B

14B

16B

18B

20B

Inside diameter (mm)

52.9

67.9

80.7

105.3

130.8

155.2

204.7

254.2

304.7

339.8

390.6

441.4

492.2

Note 2: The maximum flow range is based on the flow rate of water of 1.0g/cm

3 density and 1.0 mPa·s viscosity. When measuring liquids of

other density, calculate the value equivalent to water by the following formula and refer to the above table:

QW：Flow rate equivalent to water

Q ：Flow rate of the measured liquid

ρ

o ：Density of the measured liquid in g/cm

3

QW ＝ Q×

ρ

o × 6.31

7.31‒ρ

o

Note 3: The maximum flow range is based on the flow rate of air at 0°C, 1 atm. When measuring gases in other conditions, calculate the value

equivalent to air at 0°C, 1 atm by the following formula and refer to the above table.

ρ：Density of the measured gas [kg/m3 (normal)]

Ct：Conversion factor for the temperature

Cρ＝

ρ

1.293

t：Temperature of the measured gas [

°C]

Cｐ：Conversion factor for pressure

Ct＝

273+t

273

ｐ：Pressure of the measured gas [MPa]

Cｐ＝

0.1013

0.1013+ｐ

QA ：Flow rate equivalent to air

Q ：Flow rate of the measured gas

Cρ ：Conversion factor for density

QA ＝ Q×Cρ×Ct×Cｐ