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2.2 Temperature adjusting range
OB-3,4
Temperature adjusting range（℃）
For liquid
40-60
50-70
60-80
80-100
100-120
The term "Withstand temperature" means the
temperature from pressure resistance of the bellows.
2.3 Temperature accuracy from set point
As below, depending on capillary length
Standard
capillary length
2m
2-3.5m
3.5-5m
･If the preset temperature is higher than 100°C, add ±1.0°C.
･The preset temperature error is the maximum temperature width ranging from the time when the valve
closes until the time when the valve starts to open, not the value expressing the control width.
2.4 Cv value table
Nominal size
OB-3･3G
OB-4
OB-4G
2.5 Valve Seat Leakage
Nominal size
OB-3･3G
OB-4
OB-4G
･The values in the table above are max. Valve seat leakage is measured under the condition of
0.5MPa or max.pressure. at the temperature of "set temperature-5˚C" for cooling.
Withstand
temperature
For air
40-60
50-70
60-80
80-100
100-120
OB-3･4
For liquid
±
2℃
±
±
2.5℃
±
３℃
±
±
15A
20A
25A
2
2
4
2
2
4
2
2
4
15A
20A
25A
1.5
1.5
1.8
1.5
1.5
1.8
1.5
1.5
1.8
OB-3G,4G
Temperature adjusting range（℃）
For liquid
(℃)
70
15-35
80
20-40
90
35-55
110
40-60
130
50-70
60-80
70-90
80-100
For air
For liquid, For air
3℃
3.5℃
4℃
32A
40A
50A
7
10
―
7
10
14
7
10
14
32A
40A
50A
2.4
3.0
―
2.4
3.0
3.6
2.4
3.0
3.6
2
For air
15-35
20-40
35-55
40-60
50-70
60-80
70-90
80-100
OB-3G･4G
±
3.5℃
±
4℃
±
4.5℃
65A
80A
100A
―
―
―
21
27
42
21
27
42
Unit：steam (kg/h),water (L/h)
65A
80A
100A
―
―
―
4.8
6.0
7.2
4.8
6.0
7.2
Withstand
temperature
(℃)
50
50
70
90
100
110
120
130
125A 150A
―
―
72
94
72
―
125A 150A
―
―
9.0
10.8
9.0
―
■EPDT-258b■
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