MIYAWAKI TB1N User manual

TEMPERATURE CONTROL STEAM TRAP
USER'S MANUAL

SAFETY GUIDE
The model Supertrace TB1N trap is an energy saving, copper trace,
temperature control steam trap that takes advantage of the sensible
heat in a condensate by discharging condensate that is lower than the
saturated temperature, for any arbitrary temperature setting. Please
use this product in a steam trace line or as instrumentation.
In order to get maximum benefit from this product, be sure to read
this manual before installing it.
The following warnings and cautions are shown at appropriate
places in this manual.
WARNING
Failure to observe this type of precaution may
lead to serious injury or death.
CAUTION
Failure to follow this type of precaution can lead
to injury or damage to equipment and property.
Table of Contents
1 SPECIFICATIONS AND MARKINGS 1
2 CONSTRUCTION DETAILS 2
3 INSTALLATION 3
4 SETTING THE TEMPERATURE 4
5 STROKE TABLE 5
6 MAINTENANCE 6
7 TROUBLESHOOTING 9
8 WARRANTY 10
9 SERIAL NUMBER(S.No.) DESIGNATION 11
10 GUIDANCE FOR READING SPECIAL PRODUCT NAME 12

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1 SPECIFICATIONS AND MARKINGS
WARNING
Be sure not to use this product at higher pressures than the specified maximum
allowable pressure (PMA) or at temperatures higher than the specified maximum
allowable temperature (TMA).
The following items are displayed on the name label or the side of the product.
Check each item to avoid misuse of the product.
1) Maximum allowable pressure (PMA): 1.6MPa (230psig)
2) Maximum allowable temperature (TMA): 350°C (662°F)
3) Maximum Operating pressure (PMO): 1.6MPa (230psig)
4) Maximum operating temperature (TMO): 350°C (662°F)
5) Size: 8 mm (1/4”), or 10 mm (3/8”)
6) Year of production: The two leftmost digits in the four-digit or nine-digit 'S No.' on the
name plate are the last two digits of the year of production.
7) Flow direction: Shown by an arrow
8) Model symbol: Showing the product model name
 Some pictures and illustrations in this manual are that of the representative model of
TB1N models. For more details regarding dimensions and other specifications, please
refer to the catalog.

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2 CONSTRUCTION DETAILS
1. Body
2. Bonnet
3. Cover
4. Valve Seat
5. Shaft
6. Adjust Bolt
7. Valve
8. Screen
9. Washer
10. E-ring
11. Bimetal
12. Washer
13. Spring Plate
14. Spring

3
3 INSTALLATION
WARNING
Pay very careful attention when working in hazardous environments. There is a risk
of explosion and the possibility of dangerous gases leaking. Always check whether
the pipeline contains flammable, high pressure or high temperature materials before
starting to work.
 Make sure that isolation valves are installed on both the upstream and downstream
lines.
CAUTION
Before installing the product, open both isolation valves and the bypass valve, if
one exists, to blow out any debris or dirt inside the pipeline. After blowing out the
line, before starting to work, close the isolation valves and allow time for the
temperature to drop to a safe working temperature.
When installing the product, be sure to leave clearance for maintaining it.
1) Remove the dustproof seals covering both connections.
2) Check the flow direction indicated on the side of the body.
3) The TB1N can be used for both horizontal and vertical lines.
4) Open the isolation valve on the upstream line and make sure the product works
normally.
5) When using as a trace line, install a trap in a trace pipe.

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4 SETTING THE TEMPERATURE
WARNING
Only set the temperature when the bimetals in the body are flat, before any steam is
flowing. Be sure not to set the temperature while the steam is flowing because the
steam or condensate may spurt out around the edges in the setting part.
4.1 Set temperature
The set temperature is the temperature at which condensate will be discharged from the
temperature control trap. It is set to the temperature specified by the customer when
shipped. If the customer doesn't specify a temperature, it is always set to 70ºC at a
pressure of 0.5 MPa, as the factory default setting.
4.2 Setting the temperature
1) When the bimetal (11) is resting flat, screw the adjust bolt (6) slowly clockwise until it
stops. This position is the starting point to set the temperature.
2) See the stroke table in Section 5 to find the number of turns corresponding to the
temperature you want.
3) Screw the adjust bolt (6) counterclockwise the number of turns specified in the table.
4.3 Precautions for setting the temperature
Steam trace
Basically, the set temperature should be the temperature used to control the objects being
heated. However, please make sure to consult us if you will use the product in a cold
climate.
Other equipment
Since the appropriate set temperature depends on the equipment, please consult us.

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5 STROKE TABLE
Number of turn Set temperature
Pressure (MPa)

6
6 MAINTENANCE
WARNING
 Before removing the trap from the pipe or disassembling it, be sure to close the
isolation valves. Then, release the residual pressure from the trap body (make
sure that the pressure in the main body is equal to the atmospheric pressure).
After it has fully cooled down (after the temperature of the main body has
reached ambient temperature), confirm for safe conditions and then begin work.
 Even when the isolation valves are closed, there may be residual internal
pressure due to leaks from the isolation valves. Therefore, be very careful.
CAUTION
 When replacing parts, make sure the replacement parts are supplied by
Miyawaki.
The performance of steam traps deteriorates gradually over time due to wear, corrosion or
dirt accumulating around the valve and the valve seat. Please conduct periodic diagnosis
of traps in order to keep steam control systems and equipment working well.
6.1 Tools for Diagnosis Steam Traps
 Dr. Trap
It is a diagnostic tool with hardware (diagnostic equipment) that performs automatic
diagnosis at high speed (maximum 10 seconds) and exclusive aggregate analysis
software from the vibration and temperature information of the trap.
Diagnostic information is recorded in the diagnostic equipment and data can be
transferred to the software. As a result, high-speed aggregate analysis, quantitative
grasp of steam leakage and loss amount are possible.
 Dr. Trap Jr.
It is an inexpensive and simple diagnostic tool using hardware (steam trap checker) with
vibration sensor, temperature sensor and exclusive aggregate analysis software.
From the vibration and temperature information of the trap, the judgment such as good
or fail is made by a diagnostician. By inputting the vibration value detected by the steam
trap checker to the aggregate analysis software, it is possible to quantitatively grasp the
amount of steam leakage and money loss.
Caution:
Even if both diagnostic tools are used, accurate diagnosis results may not be obtained
depending on the location and installation status of the steam trap, or the type and
operating condition of the steam trap.
For details, please contact MIYAWAKI, our local authorized agent, or the place where you
purchased.
6.2 Repairs
When a trap fails, it is necessary to clean the internal parts and to replace damaged parts.
Take the failed trap apart following the steps below.

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6.2.1 Disassembling the trap
1) Secure the body (1) (or cover (3)) in a vise, and remove the cover (3) (or the body (1)).
When the cover (3) and the adjust bolt (6) are removed as a unit without
disassembling them, it will not be necessary to readjust the temperature setting after
reassembly.
2) Remove the bimetal part (the bimetal (11), the shaft (5), the E-ring (10), and the
washer (12)), the valve (7), the spring plate (13), and the spring (14) by hand.
*Do not take apart the bimetal part. If the bimetal discs come off the bimetal part, each
disc has a mark on one face. Place the two marked surfaces facing out, away from
each other, and then put the two bimetal discs with the washer in between them back
into the bimetal part. Treat the two bimetal discs as a set. If this assembly is wrong, the
bimetal part will not function properly.
3) When removing the bonnet (2) from the body (1) or the cover (3), be careful to keep
the bonnet (2) from being deformed or distorted. Use the proper tools to remove the
parts.
4) Remove the valve seat (4) using a socket wrench.
5) Clean and inspect the parts thoroughly.
After repairing the trap, re-assemble the parts in reverse order as follows.
6.2.2 Reassembling the trap
1) Insert the screen (8) into the body (1) and screw the valve seat (4) into the body (1).
2) Reinstall the spring (14) and the spring plate (13) on the valve seat.
3) Put the valve (7) into the center hole in the spring plate (13), and place it on the spring
plate (13) so that the tip of the valve (7) can be inserted into the hole in the valve seat
(4).
4) Reinstall the bimetal part so that the tip of the shaft (5) fits into the hole in the valve (7).
5) Screw the bonnet (2) onto the body (1), and the cover (3) onto the bonnet (2). Then,
tighten the cover (3).
* The proper torque for the Body (1), cover (3), and valve seat (4) are as shown in the
following table.
Parts Tools Across the flats Torque
Body (1) Torque wrench 22 mm (0.86”) 56N・m
Cover (3) Torque wrench 22 mm (0.86”) 56N・m
Valve seat (4) Torque wrench 23 mm (0.91”) 56N・m
* When the adjustment unit is disassembled, after reassembling it set the temperature again,
following the steps shown in the Section 4, “Setting the temperature”.

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1. Body
2. Bonnet
3. Cover
4. Valve Seat
5.
Shaft
6. Adjust Bolt
7. Valve
8. Screen
9. Washer
10.
E
-
ring
11. Bimetal
12. Washer
13. Spring Plate
14. Spring
Bimetal Unit