TLV SJ6FNX and SJ6FVX are reliable and durable ductile cast iron free float steam traps with tight shut-off for use on medium process equipment. The SJ6FNX is designed for horizontal piping installation, while the SJ6FVX is designed for vertical piping installation.

Features include a self-modulating free float that provides continuous, smooth, low-velocity condensate discharge as process loads vary. The precision-ground float, constant water seal, and three-point seating design ensure a steam-tight seal, even under no-load conditions. A thermostatic capsule (X-element) with a "fail open" feature vents air automatically until close-to-steam temperature. The built-in screen with a large surface area ensures extended trouble-free operation, and easy inline access to internal parts simplifies cleaning and reduces maintenance costs.

Specifications

Model	SJ6FNX	SJ6FVX
Installation	Horizontal	Vertical
Connection	Flanged	Flanged
Size	DN 40, 50	DN 40, 50
Orifice No.	2, 5, 9, 14, 22	2, 5, 9, 14, 22
Maximum Operating Pressure (PMO)	2, 5, 9, 14, 22 barg	2, 5, 9, 14, 22 barg
Maximum Differential Pressure (ΔPMX)	2, 5, 9, 14, 22 bar	2, 5, 9, 14, 22 bar
Maximum Operating Temperature (TMO)	220 °C	220 °C
Subcooling of X-element Fill	up to 6 °C	up to 6 °C
Type of X-element	C6	C6

WARNING

To avoid abnormal operation, accidents or serious injury, DO NOT use this product outside of the specification range. Maximum Allowable Temperature (TMA) is 220 °C. Minimum Allowable Temperature is 0 °C.

Materials

No.	Description	Material	DIN	ASTM/AISI
1	Body	Ductile Cast Iron (EN-GJS-400-18-LT)	0.7043	A395 Gr.60-40-18
2	Cover	Ductile Cast Iron (EN-GJS-400-18-LT)	0.7043	A395 Gr.60-40-18
3	Cover Gasket	Fluorine Resin PTFE	PTFE	PTFE
4	Float	Stainless Steel SUS316L	1.4404	AISI316L
5	Orifice	-	-	-
6	Orifice Gasket	Fluorine Resin PTFE	PTFE	PTFE
7	X-element Screen	Stainless Steel SUS304	1.4301	AISI304
8	Screen	Stainless Steel SUS430	1.4016	AISI430
9	Screen Holder	Cast Stainl. Steel A351/A351M Gr.CF8	1.4312	-
10	Screen Holder Gasket	Soft Iron SUYP	1.1121	AISI1010
11	Orifice Plug (SJ6FNX)	Cast Stainl. Steel A351/A351M Gr.CF8	1.4312	-
12	Orifice Plug Gasket (SJ6FNX)	Soft Iron SUYP	1.1121	AISI1010
13	Drain Plug	Carbon Steel SS400	1.0037	A6
14	X-element	Stainless Steel	-	-
15	X-element Guide	Stainless Steel SUS304	1.4301	AISI304
16	X-element Cover	Cast Stainl. Steel A351/A351M Gr.CF8	1.4312	-
17	Air Vent Valve Seat	Stainless Steel SUS420F	1.4028	AISI420F
18	Cover Bolt	Carbon Steel S45C	1.0503	AISI1045
19	Spring Clip	Stainless Steel SUS304	1.4301	AISI304
20	X-element Cover Gasket	Fluorine Resin PTFE	PTFE	PTFE
21	Nameplate	Stainless Steel SUS304	1.4301	AISI304

Dimensions

SJ6FNX Flanged (Horizontal)

DN	L (DIN 2501 PN25/40)	H1	W	B	Weight (kg)
40	230 mm	268 mm	311 mm	176 mm	22
50	230 mm	268 mm	311 mm	176 mm	24

SJ6FVX Flanged (Vertical)

DN	L (DIN 2501 PN25/40)	W1	B	Weight (kg)
40	230 mm	263 mm	176 mm	17
50	230 mm	263 mm	176 mm	18

Discharge Capacity

1. Line numbers within the graph refer to orifice numbers.
2. Differential pressure is the difference between the inlet and outlet pressure of the trap.
3. Capacities are based on continuous discharge of condensate 6 °C below saturated steam temperature.
4. Recommended safety factor: at least 1.5.

DANGER

DO NOT use this product under conditions that exceed maximum differential pressure, as condensate backup will occur!

Installation

• Install for use under conditions in which no freeze-up will occur.
• Install for use under conditions in which no water hammer will occur.
• Install the steam trap within the allowable inclination. Make sure that the arrow mark on the body corresponds with the direction of flow.
• Before installing the trap, blow out the inlet piping to remove all dirt and oil.
• 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.
• Support the pipes properly within 800 mm on either side of the trap.
• 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.
• Install a check valve at the trap outlet whenever more than one trap is connected to the condensate collection pipeline.

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.

DANGER

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

Tightening Torques

Part	Torque (N·m)	Distance Across Flats (mm)
Cover Bolt	90	22
Orifice	120	30
Screen Holder	400	50
Drain Plug	30	12
X-element Cover	140	32
Air Vent Valve Seat	35	19
Orifice Plug (SJ6FNX)	400	50

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
	The trap operating pressure exceeds the maximum specified pressure, or there is insufficient pressure differential	Compare specifications and actual operating conditions
Steam is discharged or leaks from the trap outlet	Rust and scale have accumulated around the orifice or under the float	Clean
	Orifice is damaged	Replace the orifice
	Float is deformed or coated with scale	Clean or replace the float
	Trap is installed above the maximum allowable inclination angle	Correct the installation
	Vibration of trap occurs	Lengthen inlet piping, then fasten it securely
	The X-element is damaged, or clogged with rust or scale	Clean or replace the X-element
Steam leaks from a place other than the trap outlet	Deterioration of or damage to gaskets	Replace with new gaskets
	Leakage from eroded cavities of body or cover	Replace the trap
	Improper tightening torque for cover was used	Tighten to the proper torque
Float is frequently damaged	Water hammer occurs	Examine the piping for problems that can cause water hammer