TO MAIINTAIN CONSTANT FLOW OF GASESCX-1500 Series
FLOW SET VALVE FOR GAS APPLICATIONOUTLINE
CX-1500 FLOW SET VALVE is a constant flow valve for gases.
Outlet pressure of process changes, CX-1500 maintains constantflow of gases.
CX-1500 is suitable for stable and continuous air purging at water
treatment facilities.

OPERATION PRINCIPLE
Gas flow is introduced from inlet with pressure of P1.
The lnlet pressure P1 actuates the pressure sensing plate. The
pressure sensing plate is connected to valve needle. A spring isassembled onto this valve needle unit.
The assembled spring acts so as to keep the differential pressure
P2 constant and to keep constant flow even when outlet pressure
P3 changes.

STANDARD SPECIFICATION● Measuring fluid: Air, Nitrogen, and other gases: Max. 1.2 MPa
Note: Avoid a sudden change of pressure.
: Max. 100˚C

Fluid Press.
Fluid Temp.
● Available Size

Screw connection : 15, 20, 25, 32, 40, and 50
Flange connection : 15, 20, 25, 32, 40, 50, 65, 80, 100, 125,and 150● Process connection : Rc Thread, NPT Thread, JIS 10K flange,others● Possible setting range

MODELCODE
MODEL CODE
CX-1502-

MATERIAL CONSTRUCTIONDESCRIPTION
0MATERIAL CLASS 0 *1

1MATERIAL CLASS 12MATERIAL CLASS 2Z

CONNECTION SIZE

Others, Special
015 mm (1/2")

120 mm (3/4")

225 mm (1")

332 mm (11/4")

440 mm (11/2")

550 mm (2")

665 mm (21/2")

780 mm (3")

8100 mm (4")

9125 mm (5")

A

150 mm (6")

Z

CONNECTION RATING

Rc Screw *2

2NPT Screw *2

3JIS 10K Flange

ZOthers, Special*1: Material class 1 (SUS304) or Material class 2 (SUS316) areavailable for screw connection versions.
*2: Screw connection is available only for 15 mm~50 mm. All sizes
are available for flange version.

Flow range (Air) m3/h(nor)155 to13

20

5 to1325

10 to1532

12 to2540

20 to4050

35 to90

65

45 to

150

80

60 to

250

100

100 to500

125

400 to900

150

600 to 1000

Note 1) Calibration condition Air, 20 ˚C, 49 kPa
In case the actual operating condition differs fromthem, the following compensation calculation isrequired to obtain flow rate in such condition andthen, tables are referred for size selection.

QN= QNo ×Others, Special
1Meter size

γNo
1.293

×150.3×101.3 + Po273 + To
293

QN ： Air converted ﬂow rate [m3/h (nor)]
QNo ： Flow rate of actual gas [m3/h (nor)]γNo ： Density of gas to be measured [kg/m3 (nor) ]Po ： Operating Press. [kPa]
To ： Operating temp. [｡C]●●
●2) Setting is factory set and not field adjustable
Control differential pressure range :15 to 80A

100A or more

4.9 to 44 kPa

10 to 44 kPa

Control accracy : ±5% (Against set value)
Painting: Munsell 7.5 BG 4/1.5(Body made of SUS not painted)

TG-F472-E08
9th edition Apr 2020 K
2nd edition Sep 1997

CX-1500 Series FLOW SET VALVE FOR GAS APPLICATION● Control characteristics
120120+5%+5%100

100-5%80
Flow (%)

80
Flow (%)-5%

Control diﬀerential pressure range of thevalve with a size of 80 mm or smaller(4.9 to 44 kPa)

60

Control diﬀerential pressure range of thevalve with a size of 100 mm or larger(10 to 44 kPa)

60

40402020000

4.910203040500

Control diﬀerential pressure (kPa)

102030Control diﬀerential pressure (kPa)4050

MATERIAL CONSTRUCTION

EXTERNAL DIMENSIONS❑ Screw connection type

Meter size

L (mm)

Mass (Approx.)

15150

0.9

20110

0.6

25140

1.0

32150

1.3

40170

1.6

50200

3NO.
Part Name
1 Body2 Flange
Press. sensing
3plate4 Valve
5 Valve guide6 Valve sheet
7 Spring
8 Damper
9 Guide rod
10 O ring❑ Flange connection type11 Shaft guide

Material Class 0* Material Class 1
SUS304
SUS304
SS400
SUS304

Material Class 2
SUS316
SUS316

SUS304

SUS304

SUS316

SUS304
SUS304
SUS304
SUS304
SUS304SUS304
EPDM
SCS13(80 or smaller)
SCS14(100 or larger)

SUS304
SUS304
SUS304
SUS304
SUS304
SUS304EPDM
SCS13(80 or smaller)
SCS14(100 or larger)

SUS316
SUS316
SUS316
SUS316
SUS316
SUS316FPM
SCS14* Screw connection type is the material class 1 (SUS304) or class 2 (SUS316).

Meter size

L (mm)

Mass (Approx.)

Meter size

L (mm)

1580

1.365200

Mass (Approx.)
820

80

1.6

80230

10251103100270

14321103.5125330

2040130

4150350

2650160

5.5–––* 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 : https://www.tokyokeiso.co.jp
2TOKYO KEISO CO., LTD.

TG-F472-E08