The TLV SS3N and SS3V are compact, maintenance-free, all-stainless steel free float steam traps with a bimetal thermostatic air vent. They are suitable for a wide range of small to medium capacity applications up to 21 barg (or 4.6 MPaG for related series), such as steam mains, tracer lines, and process heaters. The traps discharge condensate continuously and automatically at a temperature slightly lower than the saturation temperature.

Features

• All-welded, maintenance-free construction: Designed for long service life without the need for internal part replacement.
• Automatic bimetal air vent: Ensures rapid start-up by quickly discharging initial air and cold condensate.
• Self-modulating free float: Provides continuous, smooth, low-velocity condensate discharge as process loads vary.
• Constant water seal and three-point seating: Ensures a steam-tight seal, even under no-load conditions.
• Single moving part: The free float is the only moving part, preventing concentrated wear.
• Built-in screen: Features a large surface area to hold back impurities and ensure trouble-free operation.

Specifications

Model	SS3N	SS3V
Installation	Horizontal	Vertical
Connection	Screwed, Socket Welded, Flanged	Screwed, Socket Welded, Flanged
Size	1/2", 3/4", 1" / DN 15, 20, 25	1/2", 3/4", 1" / DN 15, 20, 25
Orifice No.	5, 10, 21	5, 10, 21
Max. Operating Pressure (PMO)	5, 10, 21 barg	5, 10, 21 barg
Max. Differential Pressure (ΔPMX)	5, 10, 21 bar	5, 10, 21 bar
Max. Operating Temperature (TMO)	400 °C	400 °C

WARNING

To avoid abnormal operation, accidents, or serious injury, DO NOT use this product outside of the specification range. Local regulations may restrict the use of this product to below the conditions quoted. DO NOT use this product under conditions that exceed maximum differential pressure, as condensate backup will occur.

Pressure Shell Design Conditions

• Max. Allowable Pressure (PMA): 24 barg
• Max. Allowable Temperature (TMA): 400 °C (Note: These are design conditions, NOT operating conditions.)

Configuration and Materials

No.	Description	Material	DIN Equivalent	ASTM/AISI Equivalent
1	Body	Stainless Steel A240 Type 316L	1.4404	—
2	Inner Cover	Stainless Steel A240 Type 316L	1.4404	—
3	Socket	Cast Stainless Steel A351 Gr.CF8	1.4312	—
4	Float Guide	Cast Stainless Steel A351 Gr.CF3M	1.4435	—
5	Screen	Stainless Steel SUS304	1.4301	AISI304
6	Air Vent Strip	Bimetal	—	—
7	Float	Stainless Steel SUS316L	1.4404	AISI316L
8	Nameplate	Stainless Steel SUS304	1.4301	AISI304
10	Flange	Cast Stainless Steel A351 Gr.CF8	1.4312	—

Installation and Piping

DANGER

NEVER apply direct heat to the float. The float may explode due to increased internal pressure, causing accidents leading to serious injury or damage to property and equipment.

Installation Guidelines

1. Before installation, remove all protective seals and blow out the inlet piping to remove dirt and oil.
2. Install a bypass valve to discharge condensate, and inlet/outlet valves to isolate the trap for maintenance.
3. Install the trap in the lowest part of the pipeline so condensate flows naturally downward by gravity.
4. Ensure the "UP" sticker (vertical type) or the nameplate (horizontal type) is facing up.
5. Install a check valve at the trap outlet if the discharge pipe leads to a recovery line or is connected to multiple traps.

Allowable Inclination

Troubleshooting

If the expected performance is unachievable after installation, check the following points:

Problem	Cause	Corrective Measures
Condensate is not discharged	Pressure exceeds maximum operating pressure	Replace trap with appropriately rated model or reduce steam pressure
	Pipelines upstream or downstream are clogged	Clean pipelines
Poor discharge of condensate	Pipelines upstream or downstream are clogged	Clean pipelines
	Trap capacity is too small	Replace with larger trap
Steam leakage or blow-off	Improper trap installation (above max. allowable inclination angle)	Correct trap installation
	Severe vibration of trap	Reinforce trap piping supports

Optional Insulation Cover

An insulation cover (glass mat/glass fiber cloth) is available as an option for the SS3N and SS3V to reduce heat loss.

Model	Applicable Steam Trap	L (mm)	D (mm)	W (mm)	H (mm)
RK4	SS3N / SS3V	160	45	90	100