TLV SJ3FNX and SJ3FVX are inline repairable free float steam traps with a thermostatic air vent (X-element). They are suitable for a wide range of applications with small-to-large capacities and pressures up to 22 barg, such as heat exchangers, tank heaters, dryers, and process equipment. The traps discharge condensate continuously and automatically, at a temperature slightly lower than saturation temperature.

Configuration

No.	Description	No.	Description
1	Body	12	Screen Holder Gasket
2	Cover	13	Air Vent Screen
3	Float	14	Element Cover Gasket
4	Orifice	15	X-element Guide
5	Orifice Gasket	16	Air Vent Valve Seat
6	Screen	17	Air Vent (X-element)
7	Screen Holder	18	Snap Ring
8	Cover Gasket	19	Air Vent Valve
9	Cover Bolt	20	Spring Clip
10	Drain Plug / Orifice Plug	21	Element Cover
11	Plug

Note: Replacement float available. Only parts for SJ3FNX/SJ3FVX are shown.

Specifications

WARNING

Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are PRESSURE SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS.

To avoid malfunctions, product damage, accidents or serious injury, install properly and DO NOT use this product outside the specification range.

Proper Installation

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.

1. Before installation, be sure to remove all protective seals.
2. Install the steam trap within the allowable inclination, as shown below. Also make sure that the arrow mark on the body corresponds with the direction of flow.
3. Before installing the trap, blow out the inlet piping to remove all dirt and oil.
4. Install the trap in the lowest part of the pipeline or equipment so the condensate flows naturally into the trap by gravity. The inlet pipe should be as short and have as few bends as possible.
5. Support the pipes properly within 800 mm (2.5 ft) on either side of the trap.
6. Install a bypass valve to discharge condensate, and inlet and outlet valves to isolate the trap in the event of trap failure or when performing maintenance.
7. Install a check valve at the trap outlet whenever more than one trap is connected to the condensate collection pipeline.

Horizontal Model (SJ3FNX)

Vertical Model (SJ3FVX)

Piping Arrangement

Requirement	Correct	Incorrect
Install a catchpot with the proper diameter.		Diameter is too small.
Make sure the flow of condensate is not obstructed.		Diameter is too small and inlet protrudes into pipe.
To prevent rust and scale from flowing into the trap, connect the inlet pipe 25 - 50 mm (1 - 2 in) above the base of the T-pipe.		Rust and scale flow into the trap with the condensate.
When installing on the blind end, make sure nothing obstructs the flow of condensate.		Condensate collects in the pipe.

Inspection and Maintenance

Operational inspections should be performed at least twice per year, or as called for by trap operating conditions. Steam trap failure may result in temperature drop in the equipment, poor product quality or losses due to steam leakage.

Parts Inspection Procedure

Part	Inspection Item
Body, Cover	Check inside for damage, dirt, grease, oil film, rust or scale
Gaskets	Check for warping or damage
X-element	Check for damage
Screen	Check for clogging, corrosion or damage
Float	Check for deformation, damage, oil film or water inside
Air Vent Valve Seat, Orifice	Check for rust, scale, oil film, wear or damage

Operational Check

A visual inspection can be carried out to aid in determining the necessity for immediate maintenance or repair, if the trap is open to atmosphere. If the trap does not discharge to atmosphere, use diagnostic equipment.

• Normal: Condensate is discharged continuously with flash steam and the sound of flow can be heard.
• Blocked: No condensate is discharged. The trap is quiet and makes no noise, and the surface temperature of the trap is low.
• Blowing: Live steam continually flows from the outlet and there is a continuous metallic sound.
• Steam Leakage: Live steam is discharged through the trap outlet together with the condensate and there is a high-pitched sound.

Troubleshooting

Problem	Cause	Remedy
No condensate is discharged or discharge is poor	Float is damaged or filled with condensate	Replace the float
	Orifice, screen or piping is clogged with rust or scale	Clean
	Steam-locking has occurred	Blowdown through the bypass or close the trap inlet valve and allow the trap to cool
	X-element is damaged	Replace the X-element
	Trap operating pressure exceeds maximum specified	Compare specifications and actual conditions
Steam is discharged or leaks from trap outlet	Rust and scale accumulated around orifice or under float	Clean
	Orifice is damaged	Replace the orifice
	Float is deformed or coated with scale	Clean or replace the float
	Trap is installed above maximum allowable inclination	Correct the installation
	Vibration of trap occurs	Lengthen inlet piping, fasten securely
	X-element is damaged or clogged	Clean or replace the X-element