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Temperature Regulator
Guidelines for Temperature Regulator OB-2000 Series
OB-2000 Series
Precautions during Installation
∙ Installation of main valve
1. Be sure that there are no foreign matters or scales
inside the piping before plumbing.
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 or cooling fluid should
be reduced with a 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.
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
13
point where the circulation is best.
Piping example
-9
13
Model OB-2000
Pressure
Temperature regulator
gauge
Strainer
Stop valve
Bypass
Sight glass
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∙ Assembly of pilot valve body and thermal bulb
Install the bellows follower into the bellows at thermal
bulb with its flat surface facing downward and then
screw the ring to assemble the bellows follower.
OB-2000
Main valve
Safety relief
valve
Thermometer
Thermal bulb
Storage tank
Heating coil
Stop
valve
Water
Strainer
Trap
Blow
OB-2000 series
OB-2000
Pilot valve
Bellows follower
Bellows
Ring
Hot water
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