Yoshitake TS-5S is a compact, lightweight thermostatic steam trap suitable for tracing lines, food equipment, medical equipment, and laundry equipment. It operates at a temperature lower than the saturated steam temperature, preventing steam leakage without requiring adjustment. The body and wetted parts are made of stainless steel for improved corrosion resistance.

Features

• Compact, lightweight design suitable for horizontal or vertical installation.
• Operates below saturated steam temperature to prevent steam leakage.
• No adjustment is required.
• Stainless steel construction for high corrosion resistance.
• Can be used as an air vent for steam.

Specifications

Model	TS-5S
Nominal Size	8A, 10A, 15A, 20A, 25A
Application	Steam, Steam condensate
Maximum Working Pressure	2.1 MPa
Maximum Allowable Back Pressure	0.4 MPa
Operation Temperature	Standard: 15℃ below saturated steam temperature (TS-5S-15)
Maximum Temperature	220℃
Material	Stainless steel (Body, Valve seat)
Connection	JIS Rc, NPT

Operation Temperature Variants

• TS-5S-15 (Standard): Operates at 15℃ below saturated steam temperature.
• TS-5S-5: Operates at 5℃ below. Recommended if inclusion of condensate in steam should be avoided (e.g., equipment utilizing direct steam).
• TS-5S-25: Operates at 25℃ below. Recommended when using as an air vent for steam to minimize flash steam.

Operation

1. Starting-up At start-up, there is a gap between the valve disc and the valve seat, and the trap is open. In this state, condensate and air is discharged.

2. Closing When steam flows into the trap, the pressure inside the capsule increases due to the heat of steam and pushes down the diaphragm. This closes the gap between the valve disc and the valve seat, and thus the trap closes.

3. Opening When the steam temperature drops and condenses, the pressure inside the capsule decreases, the diaphragm is pushed up, and the trap opens to discharge condensate. The trap repeats closing and opening according to the inflow of steam and condensate.

Discharge Capacity

To select a nominal size, secure a safety factor of 2 or more based on the working differential pressure (inlet pressure minus outlet pressure).

WARNING

Use the product with an outlet pressure of 0.4 MPa or less. The capsule may be damaged when high pressure is applied at room temperature, resulting in malfunction.

Installation

Piping example as a trap

Piping example as an air vent

Precaution for installation The TS-5S can be installed either horizontally or vertically, as long as the cover is kept upward at an angle between 0 to 90 degrees.

TIP

Before installation, remove foreign substances and scale from the piping. Install a stop valve and a strainer (80 mesh or more recommended) at the inlet side. Ensure enough space for maintenance and inspections.

Maintenance and Inspections

Daily Inspection (Once a day) Check that condensate is discharged smoothly and that there is no outside leakage of condensate or steam.

Periodic Inspection (Once a year)

To be inspected	Inspection criteria
Sealing surfaces of capsule and valve seat	No damage, abrasion, or foreign substance stuck
Shape of capsule	No deformation or damage
Dirt on screen	No clogging on screen

Troubleshooting

Trouble	Cause	Remedy
Condensate or air is not discharged	Screen is clogged	Disassemble or disconnect from pipe and clean it
	Capsule is deformed or damaged	Replace the part
	Capsule damaged due to abnormal pressure (freezing/water hammer)	Replace the part. Use within working pressure range
	Steam locking occurs	Change piping system layout
	Inlet pressure is low and outlet pressure is high	Change piping system layout
Continuous blowout	Foreign substance stuck between capsule and valve seat, scale accumulated	Close inlet stop valve, wait for temp/pressure drop, blow the product. If leakage remains, disassemble and clean
	Capsule and/or valve seat is damaged, abraded, or deformed	Replace the parts
	Discharge capacity is insufficient	Replace with another model of enough capacity
	Valve seat is loose	Retighten with proper torque
Outside leakage	Bolts loose or cover gasket damaged	Replace cover gasket. Retighten to proper torque
	Leakage due to freezing or water hammer	Replace trap. Use within working pressure

Exploded Drawing

Disassembly and Reassembly

Disassembly:

1. Loosen the bolts (10 mm) and remove the cover. Be careful not to drop the capsule.
2. Remove the valve seat and screen with a socket wrench (17 mm).

Reassembly:

1. Put the valve seat gasket and screen on the body. Screw the valve seat into the body and tighten to 25 N·m.
2. Put the cover gasket onto the groove of the body.
3. Put the capsule on the valve seat.
4. Apply lubricant (e.g., TB1901) to the bolt threads.
5. Ensure the spring is in the cover groove. Put the cover on the body and tighten the bolts diagonally to 15 N·m.