TLV SJH3NX and SJH3VX are reliable and durable free float steam traps with tight shut-off for use on small to medium high-pressure process equipment. They feature 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. Models are available for horizontal (SJH3NX) or vertical (SJH3VX) piping installation.

Specifications

Model	SJH3NX	SJH3VX
Installation	Horizontal	Vertical
Connection	Flanged	Flanged
Size	DN 15	DN 15
Orifice No.	5, 10, 14, 22, 32	5, 10, 14, 22, 32
Maximum Operating Pressure (PMO)	5, 10, 14, 22, 32 barg	5, 10, 14, 22, 32 barg
Maximum Differential Pressure (ΔPMX)	5, 10, 14, 22, 32 bar	5, 10, 14, 22, 32 bar
Maximum Operating Temperature (TMO)	240 °C	240 °C
Subcooling of X-element Fill	up to 6 °C	up to 6 °C
Type of X-element	C6	C6

WARNING

Maximum allowable pressure (PMA) is 40 barg and maximum allowable temperature (TMA) is 400 °C. These are PRESSURE SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS. Minimum Allowable Temperature is 0 °C (WCB) or -40 °C (CF8).

Dimensions

SJH3NX Flanged

DN	L (DIN 2501 PN25/40)	H1*	W*	B*	Weight (kg)
15	150 mm	160 mm	190 mm	95 mm	6.7

* Approx.

SJH3VX Flanged

DN	L (DIN 2501 PN25/40)	W1*	B1*	Weight (kg)
15	150 mm	165 mm	70 mm	5.6

* Approx.

Discharge Capacity

1. Line numbers within the graph are 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.

Configuration

No.	Description	No.	Description
1	Body	12	Screen Holder
2	Cover	13	Main Screen
3	Float	14	X-element Cover Gasket
4	Orifice	15	X-element Cover
5	Orifice Gasket	16	Spring Clip
6	Orifice Plug Gasket (SJH3NX only)	17	Air Vent (X-element)
7	Orifice Plug (SJH3NX only)	18	Air Vent Valve Seat
8	Cover Gasket	19	X-element Guide
9	Cover Bolt	20	Air Vent Screen
10	Cover Nut	21	Nameplate
11	Screen Holder Gasket

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. Before installing the trap, blow out the inlet piping to remove all dirt and oil.
3. Install the trap in the lowest part of the pipeline or equipment so the condensate flows naturally downward into the trap by gravity. The inlet pipe should be as short and have a few bends as possible.
4. Install the trap within the allowable inclination, as shown below. Also make sure that the arrow mark on the body corresponds with the direction of flow.
5. When completing the piping, 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 the condensate discharge pipe leads to a tank or recovery line, or whenever the condensate collection pipeline is connected with more than one trap.

Maximum Allowable Inclination

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 such as TLV TrapMan or TLV Pocket TrapMan.

Status	Description
Normal	Condensate is discharged continuously with flash steam and the sound of flow can be heard. If there is very little condensate, there is almost no sound of flow.
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.

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
Body, Cover(s)	Check inside for damage, dirt, grease, oil film, rust or scale
Gaskets	Check for warping or damage
X-element	Check for damage
Screen(s)	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

Tightening Torque and Distance Across Flats

Part	Torque (N·m)	Distance Across Flats (mm)
Cover Nut	60	17
Orifice	70	17
X-element Cover	140	32
Screen Holder	140	24
Air Vent Valve Seat	35	19
Orifice Plug (SJH3NX only)	200	38

Note: Coat all threads with anti-seize.

Troubleshooting

Problem	Cause	Remedy
No condensate is discharged (blocked) 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
	X-element is damaged	Replace the X-element
	The trap operating pressure exceeds the maximum specified pressure, or there is insufficient pressure differential between the trap inlet and outlet	Compare specifications and actual operating conditions
	Steam-locking has occurred	Blow down through the bypass or close the trap inlet valve and allow the trap to cool
Steam is discharged or leaks from the trap outlet (blowing) (steam leakage)	Orifice is clogged, or rust and scale have accumulated 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 or air vent valve seat is damaged, or clogged with rust or scale	Clean or replace the X-element or air vent valve seat
Steam leaks from a place other than the trap outlet	Deterioration of or damage to gaskets	Replace the gaskets
	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

Option (Integral Plate-type Bimetal Air Vent Unit)

SJH3NB Configuration

SJH3VB Configuration

Table of Tightening Torques (Bimetal Section)

Part	Torque (N·m)	Distance Across Flats (mm)
Element Cover	140	32
Air Vent Valve Seat	35	19