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Temperature Regulator – Annex
Completely discharge the internal pressure from the valves before disassembly.
13
T
emperatur
e Regulator
CAUTION
Please refer to the manual attached to the product for procedures for installation and operation.
· Installation of thermal bulb
1. Avoid bending the capillary tube at a sharp
angle, twisting or pulling it with force. Secure the
capillary tube not to allow it touch steam piping or
any other of high temperature.
The bend radius of the capillary tube should be
more than 40 mm.
2. Make sure that more than 3/4 of its total length is
in direct contact with the fluid to be heated.
3. Install a thermometer close to the thermal bulb.
4. Install a thermal bulb to the most ideal point to
detect the temperature.
5. Install a thermal bulb in a posture in which the top of
thermal bulb is higher than the other side (connecting
part to the tube), and in which the marking “T”
(on flange or nut) is always at highest position.
6. Detach the bolts from companion flanges, and
screw one piece of Companion flange into the
point where the temperature should be sensed.
Then, insert the thermal bulb and align the bolt
holes of both Companion flanges.
Next, fasten the bolts evenly with careful attention
not to twist the pipe.
(This step is not applied to OB-5 and OB-6.)
Fig.2 Thermal bulb installation example
Horizontal line
Upward
Downward
WRONG
WRONG
OK
OK
OK
Adjustment procedures
Temperature regulator
Incorrect adjustment may cause hunting, scale problems or water hammer, and may heavily damage the main
parts of the product. Be sure to follow the steps below.
1. Close the stop valves before and after the product. Open the bypass stop valve and blow fluid through the
bypass line with enough time. After discharging, be sure to close the bypass stop valve.
While blowing, be careful not to apply fluid of higher temperature than the max. allowable temperature of
the product.
2. Turn the handle and move the indicator to the desired temperature position on the scale. To raise the
temperature, turn the handle counterclockwise (when seen from the top). To lower the temperature, turn it
clockwise (when seen from the top). Reading scale is only for reference, so please adjust the temperature
by using a thermometer.
3. Slowly open the inlet stop valve to its full open position, and then, open the outlet stop valve little by little to
its full open position.
4. Adjust the handle till the desired temperature is obtained while watching the thermometer with enough
time.
Seat leakage
Temperature regulator
· Unit: Steam (kg/h), Water (ℓ/h)
Nominal size
Model
15A
20A
25A
32A
40A
50A
65A
80A
100A
125A
150A
OB-1, 1G, 2, 2G
3, 3G, 4, 4G
1.5
1.5
1.8
2.4
3.0
3.6
4.8
6.0
7.2
9.0
10.8
OB-5, 6
0.12
0.12
0.18
−
−
−
−
−
−
−
−
* These values are max. leakage amount under the working pressure of 0.5 MPa or max. pressure at the temperature of
“set tempe5˚C” for heating, or at the temperature of “set temperature -5˚C” for cooling.
