Yoshitake TSF-12 is a high-capacity lever float steam trap designed for steam condensate applications. It features a ductile cast iron body with stainless steel internal components, ensuring excellent corrosion resistance and durability. The trap is equipped with a high-pressure air vent to quickly exhaust air in the steam piping system, significantly shortening equipment start-up time.

Features

• Reliable performance and large discharge capacity ensured by a lever float system.
• All main parts such as valves, seats, air vents, and floats are made of stainless steel.
• High-pressure air vent rapidly exhausts air from the steam piping system.

Specifications

Specification	Value
Model	TSF-12
Nominal Size	40A, 50A
Application	Steam condensate
Max. Temperature	230℃
Body Material	Ductile cast iron
Float, Valve, Valve Seat	Stainless steel
Connection	JIS Rc screwed, NPT screwed

Working Pressure Ranges

• TSF-12-1: 0.01-0.1 MPa
• TSF-12-2: 0.01-0.2 MPa
• TSF-12-5: 0.01-0.5 MPa
• TSF-12-9: 0.01-0.9 MPa
• TSF-12-12: 0.01-1.2 MPa
• TSF-12-17: 0.01-1.7 MPa

Operation

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, opens the valve, and discharges condensate. Air is continuously discharged out from the air vent. When steam flows into the product, the internal pressure of the air vent rises by steam temperature, and the air vent closes. The float position moves up and down changing the opening degree of the valve according to the amount of condensate inflow.

Dimensions and Weights

Nominal Size	d	L (mm)	A (mm)	A1 (mm)	H (mm)	Weight (kg)
40A	Rc 1-1/2 / NPT 1-1/2	200	308	266	228	21.7
50A	Rc 2 / NPT 2	200	361	319	285	24.6

Maximum Continuous Discharge Capacity

Safety Factor

The discharge capacity shown in the charts is the maximum value. When designing a system, select a steam trap with a sufficient safety factor (at least twice).

40A Model:

50A Model:

Installation and Piping

Installation Posture

Confirm the direction of fluid flow matches the inlet and outlet sides of the product. Setting the product in wrong directions prevents proper functioning. Check installation posture; do not tilt the product during use. The allowable tilt from the horizontal line is within ±10°.

Piping Precautions

• 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.
• Before connecting the product to piping, remove foreign substances and scale.
• Make sure to support the piping immovably to prevent excessive piping stress.
• Slope the piping and place the product at a low position to make condensate flow by its own weight.
• Install a strainer (mesh size of 80 or more is recommended) at the inlet side.
• Avoid water hammer shock. Do not install a quick operating valve before and/or after the product.
• Install a bypass line for maintenance and inspection.

Maintenance and Inspection

Discharge Internal Pressure

Completely discharge internal pressure of the product, piping, and equipment, and cool down the product prior to disassembly or maintenance. Do not touch the product with bare hands while it operates.

Troubleshooting

Trouble	Cause	Remedy
Condensate is not discharged	Blockage of foreign substances in the valve seat.	Disassemble and clean it.
	Float is broken.	Change into new one.
	Abnormal pressure rising (freezing, water hammer).	Replace the product.
	Steam locking.	Change the piping system layout.
	Product is in wrong posture.	Adjust direction of the mark "TOP" to upward.
Continuous blowout	Foreign substances stuck on valve, valve seat or air vent.	Disassemble and clean them.
	Abrasion or scratches on internals.	Replace the parts.
	Insufficient capacity.	Replace with a model of sufficient capacity.
Steam leakage	Leakage due to loosening of the bolt.	Replace the cover gasket and retighten.

Exploded Drawing and Parts

Parts available as consumable supplies include the cover gasket, float assembly, valve seat, and air vent components.