Yoshitake TSD-46 is a thermodynamic steam trap designed with a maximum working pressure of 4.6 MPa. The wetted parts and the body are constructed from high-quality forged stainless steel. It is specifically designed for steam condensate applications and features a maximum continuous discharge capacity of 830 kg/h. The trap is connected via socket weld (ASME) and is available in nominal sizes of 15A, 20A, and 25A. It supports both horizontal and vertical installation directions.

Features

1. TSD-46 is a thermodynamic steam trap with a maximum working pressure of 4.6 MPa.
2. Wetted parts are made of stainless steel and the body is made of forged stainless steel.
3. The maximum discharge capacity is 830 kg/h.

Specifications

Model	TSD-46
Connection	Socket weld (ASME)
Nominal size	15A, 20A, 25A
Application	Steam condensate
Working Pressure	0.05 - 4.6 MPa
Allowable back pressure	50% or less of inlet pressure
Maximum temperature	425°C
Installation direction	Horizontal and vertical

Material	Part
Body	Forged stainless steel
Disc	Stainless steel
Valve seat	Stainless steel

Maximum Continuous Discharge Capacity

When selecting the nominal size, secure a safety factor of 4 to 5. The discharge capacity varies based on the operating differential pressure (inlet pressure minus outlet pressure).

Dimensions and Weights

Standard TSD-46

Size	Connection	d (mm)	L (mm)	t (mm)	H1 (mm)	H (mm)	Weight (kg)
15A	Socket weld (ASME)	22	90	11	55	120	1.8
20A	Socket weld (ASME)	27.4	90	14	55	120	1.7
25A	Socket weld (ASME)	34.1	90	14	55	120	1.6

TSD-46 With Option (Blowdown Valve)

Size	Connection	d (mm)	L (mm)	L1 (mm)	t (mm)	H1 (mm)	H (mm)	Weight (kg)
15A	Socket weld (ASME)	22	90	97	11	75	140	1.9
20A	Socket weld (ASME)	27.4	90	97	14	75	140	1.8
25A	Socket weld (ASME)	34.1	90	97	14	75	140	1.7

Option: Blowdown Valve

A blowdown valve is available as an option. It is attached to the screen and is used to discharge condensate, scale, or dirt utilizing internal pressure to the atmosphere.

How to Operate Blowdown Valve

1. Ensure it is closed before operation. Check the blow hole position and do not put your face or hands in front of the hole.
2. To open, put a tool (24 mm) on the blow cap and another (22 mm) on the blow valve, turning it slowly to loosen within one turn. Do not apply excessive force.
3. To close, fasten at a torque of 40 N·m. If leakage continues, reopen to clear stuck scale, then close again at 40 N·m.

Installation Precautions

Caution

• To discharge condensate to the atmosphere, lead the outlet to a place with no possibility of physical damage from blow-off.
• Remove foreign substances and scale from the piping before connecting.
• Check the fluid flow direction to align with the marked arrow on the product.
• Do not insulate the product.
• The product should be installed by electric welding using the same material as single or double layer. Using different materials may cause leakage due to deformation.

Maintenance and Troubleshooting

Disassembly and inspections must be performed by a professional. Completely discharge internal pressure and cool down the equipment before maintenance. Put a container under the product at disassembly since condensate may flow out.

Trouble	Cause	Remedy
Condensate is not discharged	Blockage of foreign substances in valve seat hole; Screen is clogging; Steam locking	Disassemble and clean; Change piping system layout
Continuous blowout	Foreign substances stuck on disc/valve seat; Abrasion/scratches on disc/seat; Back pressure exceeds allowable value	Disassemble and clean; Replace product; Keep back pressure below max value
Steam leakage	Leakage due to loosen joint at disc cover or strainer cap	Retighten cap; Replace gasket and retighten strainer cap

Exploded Drawing