Yoshitake TB-20 series (including TB-20 and TB-20F) inverted bucket steam traps are designed for steam condensate applications. Featuring a ductile cast iron body and a unique internal structure with a hemispherical valve, these traps ensure excellent durability and reliable performance. The intermittent operation efficiently removes the air adiabatic wall in the heat exchanger, considerably increasing heat efficiency and promoting super energy saving.

Features

• Excellent durability ensured by unique internal structure (hemispherical valve, etc).
• The upper plug is made of stainless steel, and is excellent in wear resistance.
• Reliable performance due to all stainless steel made internal parts and the unique internal structure.
• Super energy saving since intermittent operation removes air adiabatic wall in the heat exchanger and increases heat efficiency considerably.

Specifications

Model	TB-20	TB-20F
Nominal Size	15A, 20A, 25A	15A, 20A, 25A
Connection	JIS Rc screwed	JIS 10K FF / 20K FF flanged, BSEN PN25, GB/T PN25
Application	Steam condensate	Steam condensate
Max. Pressure	2.0 MPa	1.0 MPa
Max. Temperature	220°C	220°C
Body Material	Ductile cast iron	Ductile cast iron
Valve & Valve Seat	Stainless steel (Heat treated)	Stainless steel (Heat treated)

Max. Differential Pressure

• (A): 0.3 MPa
• (B): 0.6 MPa
• (C): 1.0 MPa
• (D): 1.6 MPa

Discharge Capacity Chart

The discharge capacity shown here is a continuous discharge capacity at the indicated differential pressure. In general, select a steam trap with a safety factor twice or threefold the regular level.

Dimensions and Weights

TB-20

Nominal Size	L (mm)	H (mm)	H1 (mm)	A (mm)	Weight (kg)
15A	136	183	94	117	4.3
20A	136	183	94	117	4.3
25A	136	183	94	117	4.3

TB-20F

Nominal Size	L (mm)	H (mm)	H1 (mm)	A (mm)	Weight (kg)
15A	175	183	94	117	5.4
20A	175	183	94	117	6.0
25A	175	183	94	117	6.3

(The dimensions of the product with JIS 10K FF flanged and the product with JIS 20K FF flanged are identical. The thickness of JIS 10K FF flanges conforms to that of JIS 20K FF flanges.)

Outline of Operation

1. Start of discharge: The air in a trap is pushed up with low-temperature condensate, passes along an upper valve seat, and is discharged at an outlet side. Low-temperature condensate also passes along the inside and the perimeter of a bucket by inflow of high-temperature condensate, and is discharged from an upper valve seat to an outlet side.
2. Closing operation: If steam enters in a bucket following high-temperature condensate, a bucket will come floating and will close a valve seat. If there is no inflow of condensate, carrying out a closed valve is continued.
3. Operation to discharge condensate: If condensate flows in again, a bucket will lose lift, and will sink. A valve will be opened and condensate will be discharged from a valve seat at an outlet side.

Installation Cautions

Precautions

• Connect the outlet side piping to safe places where human damage does not occur, even if condensate is blown off.
• Confirm the direction of the flow and the trap and install the trap correctly.
• Connect the trap by turning up in horizontal piping.
• Avoid using a quick-operating valve in the vicinity of the trap.
• Install a trap in the lowest possible position to collect condensate to the trap by their weight.

Exploded View

Conversion Kits Pressure Range:

• K-93070: (A) 0.01-0.3 MPa
• K-93071: (B) 0.2-0.6 MPa
• K-93072: (C) 0.3-1.0 MPa
• K-93073: (D) 0.6-1.6 MPa