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Guidelines for Temperature Regulator OB-30 Series
OB-30 Series
Precautions during Installation (Body and sensor are packed separately).
∙ Installation of body
1. Be sure not to lose the bellows follower (attached
component).
2. Install the temperature regulator perpendicularly to
horizontal piping with the handle facing upward.
3. Check the direction of the temperature regulator
so that the fluid flowing and the arrow marked on
the body are in the same direction.
4. Be sure to install pressure gauge, strainer and bypass
line to the piping (see "Piping Example" below).
5. The pressure of heating fluid should be reduced
with a pressure reducing valve if it exceeds the
maximum pressure.
6. Completely discharge the fluid inside the piping
and close the stop valves installed at before and
after the temperature regulator before stopping
operation of the product for an extended period.
7. Be sure to remove foreign matter from the piping
through the bypass line at the starting before
operating the temperature regulator.
∙ Installation of thermal bulb
1. Although the thermal bulb can be mounted in
any posture, make sure that more than 3/4 of its
total length is in direct contact with the fluid to be
heated or cooled.
2. Screw on bushing first, then use washer of
packing to secure the thermal bulb.
3. The bend radius of the capillary tube should be
more than 40 mm. Avoid bending at a sharp angle,
twisting or pulling it with force.
4. Install the thermometer close to the thermal bulb.
5. When inserting the thermal bulb into the piping for
temperature detection, it should be installed at a
point where the circulation is best.
Piping example
∙ OB-30 ∙ 30U (for heating)
Model OB-30
Temperature
Pressure
regulator
gauge
Strainer
Steam
Bypass
Trap
Condensate
Safety relief valve
Thermometer
Hot water
Thermal bulb
Capillary tube
Storage tank
Heating coil
Water
Strainer
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Temperature Regulator
∙ Assembly of body and thermal bulb
Install the bellows follower into the bellows at thermal
bulb with its flat surface facing downward and then
screw it into the lower surface of the body by the
ring. During the assembly, it makes assembly easy to
loosen the handle to direction of the "Low" position.
Becareful not to lose bellows follower. It may cause
malfunction.
∙ OB-31 ∙ 31U (for cooling)
Capillary tube
Stop
valve
Air
Thermal
bulb
After cooler
Air
Water
Step
3
Body
Bellows follower
Ring
Bellows
Model OB-31
Temperature regulator
Stop valve
Strainer
Water
Bypass
13
13
-8
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