Yoshitake TSF-11S (Ultra Steam Trap Trap Star) is a high-performance float steam trap designed for steam condensate applications. Featuring an all-stainless steel construction, it provides exceptional durability and corrosion resistance. The trap is equipped with an incorporated thermostatic air vent that efficiently discharges air inside the piping, significantly shortening warming-up times. A key advantage of the TSF-11S series is its 360-degree flow direction capability; by simply turning the cock, it can accommodate various flow directions (horizontal or vertical) without the need for disassembly.

Key Features

• Zero Steam Loss: Efficiently discharges condensate without retention, achieving zero steam loss.
• High Durability: All-stainless steel construction provides great durability and corrosion resistance.
• Quick Start-up: Incorporated thermostatic air vent discharges air inside the piping and shortens warming-up time.
• Flexible Installation: By turning the cock, it is possible to meet various flow directions. Flow direction can be switched easily without detaching the cover.
• Easy Maintenance: Since the main parts are installed on the cover, it is possible to disassemble the cover with the body installed on the piping, allowing inspection and parts replacement to be conducted easily.

Specifications

Model	TSF-10S	TSF-10SF	TSF-11S	TSF-11SF
Nominal size	15A-25A	15A-25A	25A-50A	25A-50A
Application	Steam condensate	Steam condensate	Steam condensate	Steam condensate
Working pressure	0.01-2.1 MPa*	0.01-2.1 MPa*	0.01-2.1 MPa*	0.01-2.1 MPa*
Maximum temperature	220°C	220°C	220°C	220°C
Body Material	Cast stainless steel	Cast stainless steel	Cast stainless steel	Cast stainless steel
Float Material	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Valve & Seat Material	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Connection	JIS Rc / NPT screwed	Flanged (JIS, ASME, EN)	JIS Rc / NPT screwed	Flanged (JIS, ASME, EN)

*Working pressure ranges depend on the specific variant: -5 (0.01-0.5 MPa), -10 (0.01-1.0 MPa), -21 (0.01-2.1 MPa).

Dimensions and Weights

TSF-11S (Screwed)

Nominal size	d	L	A	A1	H	Weight (kg)
25A	Rc 1	190	242	146.5	186	9.1
32A	Rc 1-1/4	190	242	146.5	186	9.2
40A	Rc 1-1/2	205	242	146.5	186	9.4
50A	Rc 2	220	242	146.5	186	9.7

TSF-11SF (Flanged)

Nominal size	L	A	A1	H	Weight (JIS 10K)	Weight (JIS 20K)
25A	270	242	146.5	186	11.7	12.0
32A	270	242	146.5	186	12.6	13.0
40A	280	242	146.5	186	13.0	13.5
50A	290	242	146.5	186	14.2	14.7

Maximum Continuous Discharge Capacity

The discharge capacity shown in the chart below is the maximum value. In designing a system, select a steam trap with a sufficient safety factor (more than two times the regular level).

Structure and Materials

No.	Name of Parts	Material
1	Body	Cast Stainless Steel (SCS13A)
2	Cover	Cast Stainless Steel (SCS13A)
3	Cock	Cast Stainless Steel (SCS13A)
4	Cover Gasket	Non Asbestos
5	Float (P)	Stainless Steel (SUS)
6	Float Holder	Stainless Steel (SUS304)
7	Valve Seat	Stainless Steel (SUS420J2)
8	Valve	Stainless Steel (SUS420J2)
9	Spindle	Stainless Steel (SUS304)
10	Screen	Stainless Steel (SUS304)
17	Air Vent (P)	Stainless Steel (SUS)

Operation

1. Start-up: At start-up, since the float is down, the valve is closed. Air in the system and piping is discharged out through the opened air vent. When condensate flows into the product, the float lifts up and opens the valve, discharging condensate.
2. Condensate Discharging: When steam flows into the product, the 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, continuously discharging condensate.
3. Air Vent Operation: When air or non-condensable gas flows into the product, it accumulates in the upper part. When the temperature decreases with condensate inflow, the air vent opens and discharges it to the outside.

Installation Guidelines

Installation Posture

Wrong posture hampers proper operation. Allowable tilt from the horizontal line is within ±10°.

Piping Precautions:

• 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.
• Install the products for each device independently.
• When collecting condensate, connect the trap discharge pipe to the top of the condensate collecting pipe and install a check valve to prevent backflow.
• The diameter of the collecting pipe shall be more than the summation of sectional areas of discharge pipes.
• Provide a by-pass line around the product, and install stop valves at the outlet side of the product.

Nameplate Adjustment: Adjust the direction of the nameplate in a no-pressure condition after installation. Fix the cock with a spanner and loosen the nut. Turn the cock and adjust the direction of the nameplate to position "TOP" and "BOTTOM" signs on the upside and downside respectively. Fasten the nut after adjustment.

Maintenance and Troubleshooting

Daily and Periodic Inspections

Conduct daily inspections during operation to ensure condensate is discharged smoothly and there is no outside leakage. Perform a periodic disassembly inspection once a year to check for scratches on seat surfaces, float deformation, and screen clogging.

Trouble	Cause	Remedy
Condensate is not discharged	Blockage of foreign substances in a discharge hole.	Disassemble and clean it.
	The screen is clogging.	Disassemble and clean it.
	The float (P) is damaged.	Replace it with a new one.
	"TOP" and "BOTTOM" signs on the Nameplate are in wrong positions.	Adjust direction of the Nameplate.
Continuous blowout	Foreign substances stuck on valve, valve seat or air vent.	Disassemble and clean them.
	Abrasion or scratches on the valve, valve seat or air vent.	Replace the parts with new ones.
	Insufficient capacity of the product.	Replace with a model of sufficient capacity.
Steam leakage	Leakage due to loosening of the bolts.	Replace the cover gasket and retighten bolts.
	Leakage due to deterioration of cock gasket and O-ring.	Replace the parts with new ones.