Fushiman S2 type bellows trap for steam (heat sink trap)

Manufacturer: Fushiman Co.,LTD.
Model: S2

Model	Nominal Diameter	Method	Maximum Operating Pressure	Maximum Operating Temperature	Body Material	Connection
S2 (photo shows angle type)	15–25	Bellows	0.4 MPa	Saturation	CAC	Screw-in

Features

A high-quality product refined through many years of manufacturing experience and research improvements.
Uses a multi-stage metal bellows for highly sensitive operation.
No need for an air vent valve.

Specifications and Materials

Model	Fluid	Nominal Diameter	Main Applications	Connection Type	Max Operating Pressure	Max Temperature	Valve Box	Valve Seat	Bellows	Pipe Connection
S2	Steam Drain	15–25	Heater drain discharge / Automatic air vent valve	Straight or angle type	0.1 MPa / 0.4 MPa	Saturated temperature	Brass / Chrome-plated	Brass / Stainless steel	Phosphor bronze	Threaded JIS Rc

Note (1): The 0.4 MPa model comes with a protective cover on the bellows.

Operation Description

The S2-type thermostatic trap contains a built-in bellows filled with a volatile liquid.
When the bellows comes into contact with steam, it expands and closes the valve; when it comes into contact with condensate or air, it contracts and opens the valve. This operation is intermittent.

Structure and Dimensions

Dimensions and Weight: Angle Type

Nominal Diameter (mm)	L	H₁	H₂	E	Weight (kg)
15	80	35	53	59	0.76
20	87	41	58	64	1.0
25	105	52	71	64	1.6

Dimensions and Weight: Straight Type

Nominal Diameter (mm)	L₁	L₂	H₁	H₂	E	Weight (kg)
15	80	43	28	53	59	0.85
20	87	48	34	58	64	1.15
25	105	60	40	76	64	1.9

Continuous Drain Discharge Capacity (kg/h)

Nominal Diameter (mm)	Max Operating Pressure / Differential Pressure
Nominal Diameter (mm)	0.1 MPa / 35 kPa	0.1 MPa / 0.1 MPa	0.4 MPa / 0.4 MPa
15	400 or more	650 or more	400 or more
20	700 or more	1100 or more	700 or more
25	1100 or more	1800 or more	1100 or more