Yoshitake TRAP STAR TSF-8 User manual

■EPDT-320b■
PRODUCT MANUAL .
Thank you very much for choosing the Yoshitake’s product. To ensure the correct and safe use of the
product, please read this manual before use. This manual shall be kept with care for future references.
The symbols used in this manual have the following meanings.
Warning
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
Caution
This symbol indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury or may result in only property damage.
Table of Contents
1. Usage of the Product·················································· 1
2. Specifications···························································· 1
3. Dimensions and Weights············································· 2
4. Operation ······························································· 3
5. Maximum Continuous Discharge Capacity ······················ 4
6. Installation
6.1 Piping example···················································· 5
6.2 Precaution for installation······································· 7
7. Operating Procedure ·················································10
7.1 Precaution for operating procedure ························· 10
8. Maintenance
8.1 Precaution for maintenance ·································· 10
8.2 Daily and periodic inspections ······························· 11
8.3 Troubleshooting··················································12
8.4 Exploded drawing ···············································13
8.5 Disassembly ······················································14
8.6 Reassembly·······················································15
8.7 Parts replacement procedure ································ 16
Warranty Information
STEAM TRAP
MODEL TSF-8,8F

1 ■EPDT-320b■
1.
Usage
of the product
The TSF-8 can discharge condensate effectively without retention, and realize energy saving steam system
without steam loss. In addition, built in thermostatic air vent discharges air inside the piping and shortens
warming-up time. So, the product is suitable for steam equipments used in various industries such as
air-conditioning equipment, hot-water supply equipment, plant, and food.
2
.
Specifications
Model TSF-8 TSF-8F
Nominal size 15A-25A
Application Steam condensate
Working pressure
(Maximum working
differential pressure)
TSF-8-5, 8F-5: 0.01-0.5 MPa (0.5 MPa)
TSF-8-10, 8F-10: 0.01-1.0 MPa (1.0 MPa)
TSF-8-21, 8F-21: 0.01-2.1 MPa (2.1 MPa)
Max. temperature 220°C
Material
Body Ductile cast iron
Float Stainless steel
Valve,
valve seat
Stainless steel
Connection JIS Rc screwed
NPT screwed
JIS10K/20KFF
ENPN25 RF
ASME 150lb/300lb RF
Flow direction Left to Right ( Standard)
* Suffix “V” for “Top to Bottom” flow, and “R” for “Right to Left” flow.
* For installation posture, see 3 of “6.2 Precaution for installation“ on Page 8.
Caution
1.Depending on application, specification of the product shall be selected. Refer to
Technical material, e.g. Product manual, Technical guidebook, and drawing, and
select suitable specification. Regarding technical material like drawing, contact our
sales office.
2.Please confirm that the indications on the product correspond with the
specifications of the ordered product model before use.
* If they are different, do not use the product and contact us.

2 ■EPDT-320b■
3
. Dimensions and Weights
(mm)
(mm)
model
Nominal
size d ＬA A1H Weight
(kg)
TSF-8
15A Rc1/2 121 147 90 113 3.7
20A Rc3/4 121 147 90 113 3.7
25A Rc1 145 147 90 113 4.1
model
Nominal
size ＬA A
1
H Flange JIS10K/20K FF Weight
(kg)
d D C t n-h
TSF-8F
15A
1
75
1
4
7
90 113
15 95 70 14 4-15 5.2
20A
1
95
1
4
7
90 113
20 100 75 16 4-15 6.0
25A
215
1
4
7
90 113
25 125 90 18 4-19 7.1

3 ■EPDT-320b■
4
. Operation
1.
At start-up, since the float is down, the valve is
closed. In this state, air in the system and piping is
discharged out through the air vent which is opened.
When condensate flows into the product, the float
lifts up and opens the valve, and then discharges
condensate. Air is continuously discharged out from
the air vent.
When steam flows into the product, internal pressure
of the air vent rises by steam temperature, and the
air vent closes. According to the amount of
condensate inflow, the float position moves up and
down changing the opening degree of the valve, and
thus condensate is continuously discharged. The
float moves down and the valve closes when
condensate inflow stops.
When air or non-condensable gas flows into the
product, it accumulates in the upper part of the
product. When temperature of air or
non-condensable gas decreases with condensate
inflow, the air vent opens and discharges it to
outside of the product.
Then, operations 2 and 3 repeats according to the
inflow amount of condensate and air.
3. Air vent operation
2. Condensate discharging operation
1. Start-up of the operation Float
Air vent
Valve
Air
Steam
Condensate

4 ■EPDT-320b■
TSF-8-5
5
. Maximum Continuous Discharge Capacity
1. Discharging capability of the steam trap differs by working differential pressure, that is, difference
between inlet pressure and outlet pressure (back pressure). In selecting discharge capacity,
consider outlet pressure. If inlet pressure is 0.5 MPa and outlet pressure is 0.2 MPa, discharge
capacity is of working differential pressure of 0.3 MPa.
2. The discharge capacity shown in the charts below is the maximum value. In designing a system, select a
steam trap with a sufficient safety factor (two times the regular level). That is, for example, if a discharge
capacity of 500 kg/h is required, select a steam trap capable of discharging more than 1,000 kg/h
(maximum discharge).
Maximum Continuous Discharge Capacity Chart
0
500
1000
1500
2000
0 0.5 1 1.5 2
排出量 (kg/h)
作動圧力差 (MPa)
TSF-10・10F 排出量線図
TSF-8,8F
Discharge Capacity (kg/h)
TSF-8-5
TSF-8F-5
Working differential pressure (MPa)
TSF-8-10
TSF-8F-10
TSF-8-21
TSF-8F-21

5 ■EPDT-320b■
Steam main Steam main
Drip leg
Trap
Stop
valve
Trap
6
. Installation
6.1 Piping example
Description Correct Incorrect
If the product is installed close
to a regulating valve, make
sure to install the product at
the inlet side of the regulating
valve.
To discharge condensate from
the steam main, be sure to
install the product so that
condensate can be discharged
from the bottom of the steam
main by drip leg.
Regulating
valve
Regulating
valve
Stop valve
Pressure
gauge
Stop
valve
Check
valve
Sight
glass
TSF-8
Steam Trap
Strainer
Stop
valve
Stop
valve
Drip leg
Stop valve
Pressure gauge

6 ■EPDT-320b■
Low
pressure
High pressure
Low pressure
High pressure
Description Correct Incorrect
Install the product below a
device which generates
condensate.
Install the products for each
device independently.
The diameter of collecting pipe
shall be more than summation
of sectional areas of discharge
pipes.
In addition, install check valves
for back flow prevention.
For condensate recovery,
connect the discharge pipe to
the upper part of collecting
pipe.
For traps of different pressure
lines, install collecting pipes
individually for each pressure.
In addition, install check valves
for back flow prevention.
* Re-evaporated steam in high
pressure line increases the back
pressure of low pressure trap.

7 ■EPDT-320b■
Stop
valve
Stop
valve
By-pass valve
Stop
valve
Trap Trap
Stop
valve
By-pass valve
Description Correct Incorrect
End portion of discharge pipe
shall be off the water surface in
the pit.
* If the discharge pipe is in contact
with the water, it sucks up dirty
water in the pit and causes
malfunction of the product.
Provide a by-pass line around
the product, and install stop
valves at the outlet side of the
product.
6.2 Precaution for installation
Warning
1. In order to discharge condensate to the atmosphere, lead the outlet to a safe place where there is no
possibility of physical damage even if condensate blows out.
* Failure to follow this notice may result in scalds or injury when condensate blows out.
Caution
1. Before connecting the product to piping, remove foreign substances and scale from the piping.
* Failure to follow this notice may prevent the product from functioning properly.
* To plumb the product, be careful to keep seal materials from entering into the product.
2. To install the product, check the direction of the product so that the fluid flowing and the arrow marked
on the product are in the same direction.
* Setting the product in wrong directions prevents it from functioning properly.

8 ■EPDT-320b■
UP
DOWN
3. Check installation posture.
* Wrong posture hampers proper operation.
* Allowable tilt from horizontal line is within ±10°.
4. Make sure to support the piping immovably.
* If an excessive piping stress is applied, the product may not open or close.
5. Do not disassemble the product unless it is necessary.
* Disassembly may prevent the product from functioning properly.
TOP
BOTTOM
WRONG

9 ■EPDT-320b■
6. Secure enough space for maintenance (such as cleaning of strainer), inspections and repair as
shown below.
* Failure to follow this notice prevents maintenance, inspection and repair.
7. Slope the piping and place the product at as a low position as possible in order to make condensate
flow into the product by its own weight.
8. To install the product in a main steam pipe, provide a drip leg at the inlet side of the product.
9. Install a strainer (mesh size of 80 or more is recommended) at the inlet side of the product.
10. Install the product so that it is not subjected to the shock of water hammer. Do not install a quick operating
valve before and/or after the product.
* Failure to follow this notice may result in malfunction due to damage to the float or air vent, or may result
in scalds or injury due to blow off when the product is subjected to an excessive shock and damaged.
11. Install a bypass line.
* The system has to stop operation while inspection and maintenance of the product if the bypass line is
not installed.
175 mm or more

10 ■EPDT-320b■
7
. Operating Procedure
7.1 Precaution for operating procedure
Warning
1. Before leading fluid, make sure that the product is securely connected to piping and that there is no
loose.
* Failure to follow this notice may result in scalds or injury due to blow-off.
2. Do not touch the product with bare hands while the product operates.
* Failure to follow this notice may result in scalds.
3. Do not stand in front of the outlet opening of the product while the product operates.
* Failure to follow this notice may result in scalds or injury due to blow-off.
Caution
1. Slowly open each stop valve to prevent water hammer.
* Opening stop valves quickly may result in damage to other equipments due to hunting or water
hammer.
8
. Maintenance
8.1 Precaution for maintenance
Warning
1. Do not touch the product with bare hands.
* Failure to follow this notice may result in burns.
2. Completely discharge internal pressure of the product, piping and equipment, and cool down the product
prior to disassembly or maintenance.
* Failure to follow this notice may result in scalds or injury due to residual pressure.

11 ■EPDT-320b■
Caution
1. Conduct daily inspection in order to maintain the optimal performance of the product.
* Failure to follow this notice may prevent the product from functioning properly.
* See “8.3 Troubleshooting” on Page 12 if trouble is observed.
2. After leaving the product not operated for a long period, perform inspection before start-up of operation.
* Failure to follow this notice may cause malfunction due to rust inside of the product and piping.
3. Put a container under the product at disassembly since condensate may flow out.
* Failure to follow this notice may result in making the surroundings dirty.
4. Be careful not to drop the parts at the time of disassembly. The disassembled parts should be placed on
soft cloth in order to avoid scratches and damage.
* Damage on the parts may cause malfunction and affect the optimal performance.
5. To assemble, connect all the parts securely and tighten the bolts uniformly in diagonal order.
* Failure to follow this notice may cause malfunction or outside leakage.
6. When repairing, do not use the parts other than the dedicated parts manufactured by Yoshitake. Do not
modify the product.
* Failure to follow this notice may cause damage to the product, or may result in scalds or injury due to
blow-off or malfunction.
7. In case of problems due to foreign substances or scale, the product needs repair or part replacement.
Please contact us for details.
(Please note that any repair due to foreign substances or scale in the product is subject to a charge even
during the warranty period.)
8.2 Daily and periodic inspections
Conduct daily and periodic inspections in order to maintain the optimal performance of the product.
See ”8.3 Troubleshooting” on Page 12 for the remedies if trouble is observed.
Daily inspection (once a day)
Conduct daily inspection during operation of the product.
Items Standards for Inspection
Discharge condition
of condensate Condensate is discharged smoothly.
Outside leakage No outside leakage of condensate or steam.
Periodic inspection (once a year)
Conduct disassembly inspection periodically.
Items Standards for Inspection
Seating surfaces of
the valve and valve
seat
No scratch, abrasion, or foreign substances on seating surfaces.
Shape of float (P) No deformation or damage on the float (P)
Dirt on the screen No clogging on the screen

12 ■EPDT-320b■
8.3 Troubleshooting
Trouble Cause Remedy
Condensate is not
discharged.
1.
Blockage of foreign substances in
a discharge hole of the valve
seat.
1.
Disassemble and clean it.
2.
The screen is clogging.
2.
Disassemble and clean it.
3.
The float
(P)
is damaged.
3.
Replace
it
with a new one.
4.
Breakage as a result of abnormal
pressure rising due to freezing or
water hammer, etc.
4.
Replace the product with new one and
use it within the working pressure range.
5.
Steam locking.
5.
Change the piping system layout.
6.
“
TOP
”
and
“
BOTTO
M
”
signs on
the name plate are in wrong
positions.
6. Adjust direction of the name plate to
position "TOP" and "BOTTOM" signs on
upside and downside respectively.
* See Caution No. 3, “6.2 Precaution for
installation
”
on Page 8.
Continuous blowout.
1.
Foreign s
ubstances stuck on
valve, valve seat or air vent (P).
1.
Disassemble and clean them.
2.
Abrasion or scratch
es
on the valve,
valve seat or air vent (P).
2.
Replace the parts
with new ones
.
3.
Insufficient capa
city
of the
product.
3.
Replace the product with another mo
del
of sufficient capacity.
4.
“
TOP
”
and
“
BOTTOM
”
signs on
the name plate are in wrong
positions.
4.
A
djust direction of the
name plate to
position "TOP" and "BOTTOM" signs on
upside and downside respectively.
* See Caution No. 3, “6.2 Precaution for
installat
ion
”
on Page 8
.
Steam leakage.
1.
Leakage due to loosening of the
bolt.
1.
Replace the cover gasket with new one,
and retighten the bolt.
2.
Leakage as a result of abnormal
pressure rising due to freezing or
water hammer, etc.
2.
Replace the product with new one an
d
use it within the working pressure range.

13 ■EPDT-320b■
8.4 Exploded drawing
The parts shown in the rectangle boxes are available as consumable supply.
The air vent(P) cannot be removed from the cover.

14 ■EPDT-320b■
8.5 Disassembly
Tools to be used
Name of tool Size (Nominal size)
Ring wrench 19 mm
[Procedure 1]
[Procedure 1] Loosen the bolts fixing the cover with ring wrench (width across flat: 19
mm), and remove the cover and gasket from the body. Pull out the
screen from the body.
[Procedure 2] Pull out the spindle from the float holder and remove the float (P)
assembly.
Spindle

15 ■EPDT-320b■
8.6 Reassembly
Tools to be used
Name of tool Size (Nominal size)
Torque Wrench
* Tightenable with torque of 45 N・m
Width across flat: 19 mm
[Procedure 1] Connect the float holder and float (P) assembly with the spindle.
Check that the float (P) assembly moves smoothly, and that the seat
surface of the valve is in contact with that of the valve seat.
[Procedure 2] Attach the screen to the body. The screen can be inserted from either
end.
OK
WRONG
The stopper is on the center of the
cock.
The stopper is on the outer
circumference of the cock.

16 ■EPDT-320b■
8.7 Parts replacement procedure
Part name Disassembly
(See 8.5.)
Reassembly
(See 8.6.)
Cover gasket Procedure 1 Procedures 3 to 4
Float (P) assembly Procedures 1 to 2 Procedures 1 to 4
Cover assembly Procedures 1 to 2 Procedures 1 to 4
Screen Procedure 1 Procedures 2 to 4
[Procedure 4]
[Procedure 3] Install the cover gasket to the cover. Make the oval-shaped holes on
the cover and on the cover gasket in the same position. Make sure to
use a new cover gasket. Apply lubricant agent to the cover gasket
(Recommendation: SOLVEST No.110 paste, STT Inc.).
Install the cover to the body. Tighten the bolt with torque wrench (width
across flat: 19 mm) with torque of 45 N・m.
* Do not use impact wrench to tighten the bolt. Using it may cause
unevenly tightened bolt or damaged gasket, resulting in outside
leakage of condensate or steam.

PDD-046f
Warranty Information
1. Limited warranty
This product has been manufactured using highly-advanced techniques and subjected to
strict quality control. Please be sure to use the product in accordance with instructions on
the manual and the label attached to it.
Yoshitake warrants the product to be free from any defects in material and workmanship
under normal usage for a period of one year from the date of receipt by the original user, but
no longer than 24 months from the date of shipment from Yoshitake’s factory.
2. Parts supply after product discontinuation
This product may be subject to discontinuation or change for improvement without any prior
notice. After the discontinuation of the product, Yoshitake supplies the repair parts for 5
years otherwise individually agreed.
3. This warranty does not cover the damage due to any of below:
(1) Valve seat leakage or malfunction caused by foreign substances inside piping.
(2) Improper handling or misuse.
(3) Improper supply conditions such as abnormal water pressure/quality.
(4) Water scale or freezing.
(5) Trouble with power/air supply.
(6) Any alteration made by other than Yoshitake.
(7) Use under severe conditions deviating from the design specifications
( e.g. in case of corrosion due to outdoor use).
(8) Fire, flood, earthquake, thunder and other natural disasters.
(9) Consumable parts such as O-ring, gasket, diaphragm and etc.
Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product.