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The automatic temperature adjustment valves, OB-3, OB-3G, OB-4 and OB-4G, are used in the systems for
ocean vessels, industrial plants, air conditioning equipment, chemical industry, etc. for adjusting the cooling
temperature.
2.1 Specifications
Model
Nominal size
Application
Maximum
Pressure
Max. temperature
Temperature
adjusting range
Ambient temperature
Body
Valve, Valve seat
Valve spindle
Material
Bellows
Thermal
bulb
Standard capillary length
Connection
Model
Nominal size
Application
Maximum
Pressure
Max. temperature
Temperature
adjusting range
Ambient temperature
Body
Valve, Valve seat
Valve spindle
Material
Bellows
Thermal
bulb
Standard capillary length
Connection
･If the ambient temperature is higher than the set temperature or less than 40℃, use the OB-4G
(with external pressure type bellows).
・If using at a pressure higher than 0.5 MPa, with stainless steel trim parts is recommended.
･Available with capillary of up to 5 meter.
・Available with Max. pressure inside [ ] (Valve and valve seat material, and bellows is different
from standard type).
・Available with thermal well (SUS304 made or with a PTFE cap) for liquid.
1. Usage of the Product
2. Specifications
Heating
Heated
Body
Thermal bulb
For liquid
For air
Set temperature -10℃ or less Set temperature +30℃ or less
For liquid
For air
Heating
Heated
Body
Thermal bulb
For liquid
For air
Set temperature -10℃ or less Set temperature +30℃ or less
For liquid
For air
OB-3
15-40A
Cold water, Refrigerant
Cold and hot water, Oil, Non-dangerous fluid
0.7MPa
1.0MPa
180 ℃
40-120 ℃
bronze
bronze
Stainless steel
Phosphor bronze
Stainless steel
Stainless steel
2m
JIS Rc screwed (union joint)
OB-4
15-150A
Cold water, Refrigerant
Cold and hot water, Oil, Non-dangerous fluid
15-40A:0.7MPa [1.0MPa]
50A:0.5MPa [0.7MPa]
65A:0.5MPa [0.7MPa]
80A:0.4MPa [0.5MPa]
100A:0.4MPa
125A:0.2MPa [0.35MPa for OB-4]
150A:0.2MPa
1.0MPa
180 ℃
40-120 ℃
Cast iron
bronze (stainless steel)
Stainless steel
Phosphor bronze
Stainless steel
Stainless steel
15-80A：2m 100-150A：3m
JIS 10K FF flange
1
OB-3G
15-100 ℃
OB-4G
15-125A
15-100 ℃
■EPDT-258b■
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