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Temperature Regulator
OB-4,4G
Direct acting type
Pilot operated type
Bellows
Diaphragm
Soft seat
Features
1. These temperature regulators do not require any adjusting
tool because equipped with an adjusting handle which
leads to easy adjustment.
2. Since these temperature regulators adopt a dual-valve
structure, the flow rate is larger than that of single-valve
temperature regulators.
3. Excellent accuracy since special packing is used for spindle
gland packing which affects opening/closing operation of
the valve.
4. OB-4G ensures distinguished temperature resistance due
to an external pressure type bellows.
Specifications
Model
Cooling
Application
Cooled
Body
Max. pressure
Thermal valve
Maximum temperature
For liquid
Temperature
adjusting range
For air
Ambient temperature
Body
Valve, valve seat
Valve spindle
Material
Bellows
For liquid
Thermal
valve
For air
Standard capillary length
Connection
* Valve seat leakage: Refer to P. -43.
* I f the ambient temperature is higher than the set temperature or less than 40˚C, use the OB-4G (with external pressure
type bellows).
∙ Available with capillary of up to 5 meter. (Please refer to P. -46 for errors of set temperature).
∙ Available with Max. temperature inside [ ]. (Valve and valve seat material, and bellows is different from standard type).
∙ Available with temperature adjusting range of 30˚C. (For OB-4 only).
∙ Available with thermal well (SUS304 made or with a PTFE cap) for liquid.
Heating
Cooling
Single valve
Double valve
OB-4
40-120°C
40-120°C
Set temp. -10°C or less
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Cold water, Refrigerant
Cold and hot water, Oil, Non-dangerous fluid
15A-40A: 0.7 MPa 1.0 MPa
50A: 0.5 MPa 0.7 MPa
65A: 0.5 MPa 0.7 MPa
80A: 0.4 MPa 0.5 MPa
100A : 0.4 MPa
125A: 0.2 MPa 0.35 MPa for OB-4
150A : 0.2 MPa
1.0 MPa
180°C
Cast iron
Phosphor bronze (Stainless steel)
Stainless steel
Phosphor bronze
Stainless steel
Stainless steel with fin
15A-80A: 2 m 100A-150A: 3 m
JIS 10K FF flanged
OB-4G
15-100°C
15-100°C
Set temp. 30°C or less
13
13
-26
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