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Thermostatic Steam Traps

These steam traps operate via the temperature difference between steam and condensate.

Operating Pressure Range: 0.1 - 32 barg
Operating Temperature Range: 0 - 240 °C

Balanced Pressure Thermostatic Steam Traps Pamphlet (663 KB)
QuickTrap® Series Pamphlet (175 KB)
Thermostatic Steam Trap L21S (Animation)

Benefits and Features

All L, LV, and FL series models employ a thermoliquid-filled X-element, which acts as the valve.

Improved Productivity: The X-element discharges hot air as well as low-temperature air and cold condensate. This encourages the inflow of steam, thereby reducing start-up times.
Protects Equipment: The valve remains open even in the event of a failure due to the 'fail open' construction of the X-element, which means that the equipment can continue operating (though steam loss will occur).
Long Service Life: Any rust or scale entering the trap from the piping is discharged together with the condensate through the large valve opening, greatly reducing the chance of a build-up of rust or scale that could obstruct the valve opening.

Application Areas

Suitable for use in a variety of applications.

Main Applications: Air conditioning, steam tracers, steam heating equipment, etc.

Product Selection by Application

This guide shows the most suitable TLV steam traps for an array of applications.
Start by selecting an application from the drop-down menu at the top, then search for your desired operation principle, pressure category, and other special features to find the right steam trap.

Steam Mains and Steam Headers

Steam Mains and Steam Headers	Product Features Models categorized for "energy saving" have minimal steam loss Tight seal even under minimal load Operation not receptive to environmental influences (wind, rain/snow) Initial air venting feature Special Features for Pipe End Traps Initial air venting feature Swift discharge of high condensate load at start-up No condensate back-up owing to continuous discharge
Operation Principle	Pressure Category*1 (barg)	Remark	Product Series	Further Reference
Continuous discharge (Energy saving model)	Up to 10	With bypass valve	J3S-X-BV, J3S-X-PB	Steam Traps with Bypass Valve
	Up to 21	-	SS Series (SS1, SS3)	Free Float® Steam Traps for Main Lines
	Up to 21	With bypass valve	J3S-X-RV	Steam Traps with Bypass Valve
	Up to 32	-	SS Series (SS5)	Free Float® Steam Traps for Main Lines
		-	JH3S-B	Free Float® Steam Traps (Medium / High Pressure)
		QuickTrap with universal connector	FS Series	Free Float® Steam Traps for Main Lines
	Up to 46	QuickTrap with universal connector	FS Series (FS5H)
		-	SS Series (SS5H)
			JH-B Series	Free Float® Steam Traps (Medium / High Pressure)
	Up to 65		SH Series	Free Float® Steam Traps for Main Lines
	Up to 65		JH-P Series	Free Float® Steam Traps (Medium / High Pressure)
	Up to 100		JH7RH-B
	Up to 120		JH7RH-P
Cyclic operation (Energy saving model)	Up to 32	-	L Series	Thermostatic Steam Traps
Cyclic operation (Energy saving model)	Up to 32	QuickTrap with universal connector	FL Series	Thermostatic Steam Traps
Intermittent operation	Up to 13	Inline replaceable valve module	A3N	Disc-Type Steam Traps
	Up to 46	QuickTrap with universal connector & inline replaceable valve module	FP46UC
	Up to 65	Inline replaceable valve module	P Series*2
	Up to 260	Inline replaceable valve module	HR Series

*1 Operating pressures vary between different models of the same series. For details please refer to individual Specification Data Sheets (SDS).
*2 Except P46S and P21S ver.C.

Equipment and Processes

Equipment and Processes		Product Features No condensate back-up owing to continuous discharge Self-modulating discharge as condensate load varies Initial air venting feature High back pressure tolerance (Condensate discharge capacity even at small differential pressure) "Fail open" to avoid condensate back-up under any circumstances
End-usage		Pressure Category*2 (barg)	Remark	Series	Further Reference
Heating	Heat exchangers1 Reboilers1 Heaters, pre-heaters Jacketed kettles1 Autoclaves (Sterilizers, etc.) Tank heaters1 Other heaters	Up to 10	With bypass valve	J3S-X-BV, J3S-X-PB	Steam Traps with Bypass Valve
		Up to 22	-	SJFX Series	Free Float® Steam Traps (Low Pressure)
		Up to 21	-	JX Series	Free Float® Steam Traps (Low Pressure)
			With bypass valve	J3S-X-RV	Steam Traps with Bypass Valve
			For sterile processes	LV6	Clean Steam Traps
			For sterile processes	SS5P	Clean Steam Traps
		Up to 32	For small size equipment	L Series	Thermostatic Steam Traps
		Up to 32	-	JH-X Series	Free Float® Steam Traps (Medium / High Pressure)
Vaporization	Evaporators1 Tank crystallizers1 Enrichment tanks1 Distillers1 Other vaporizers	Up to 46	-	JH-B Series
		Up to 46	Up to 400°C	SJH Series
		Up to 65	-	SH Series
		Up to 65		JH-P Series
		Up to 100		JH7RH-B
		Up to 120		JH7RH-P
Drying	Hot air dryers Presses Other dryers	Up to 32	-	JL Series	Large Capacity Float Steam Traps
		Up to 46	-	JL15 Series	Large Capacity Float Steam Traps
		Up to 46	Up to 400°C	SJH Series	Free Float® Steam Traps (Low Pressure)
	Cylinder dryers, roll dryers Corrugated folding presses, etc.	Up to 22	-	SJFX Series
		Up to 21	-	JX Series
		Up to 32	For small size equipment	L Series	Thermostatic Steam Traps
		Up to 32	-	SJHX Series	Free Float® Steam Traps (Medium / High Pressure)
1 Depending on the operation condition, the indicated equipment may be subject to "stall" (see 3 below). In such cases, GT Series PowerTraps are required. GT Series PowerTraps are steam traps that feature a pump function.				GT Series	PowerTraps

*2 Operating pressures vary between different models of the same series. For details please refer to individual Specification Data Sheets (SDS).

*3 "Stall" is a phenomenon where the internal pressure of an equipment falls below the back pressure on the outlet side, resulting in back-up of condensate that cannot be discharged by conventional steam traps. "Stall" can cause damage such as uneven/incomplete product heating, corrosion and waterhammer.

Heat Exchangers and Air Conditioning

Heat Exchangers and Air Conditioning	Product Features No condensate back-up owing to continuous discharge Self-modulating discharge as condensate load and pressure changes Initial air venting feature Quiet operation
End-usage	Pressure Category*2 barg	Remark	Series	Further Reference
Air conditioners / air heaters1 Unit heaters Plate heat exchangers Strip heaters1 Other heaters and air conditioners	Up to 10	With bypass valve	J3S-X-BV, J3S-X-PB	Steam Traps with Bypass Valve
	Up to 22	-	SJFX	Free Float® Steam Traps (Low Pressure)
	Up to 21	-	JX Series	Free Float® Steam Traps (Low Pressure)
	Up to 21	With bypass valve	J3S-X-RV	Steam Traps with Bypass Valve
	Up to 32	For small size equipment	L Series	Thermostatic Steam Traps
	Up to 32	-	SJHX Series	Free Float® Steam Traps (Medium / High Pressure)
1 Depending on the operation condition, the indicated equipment may be subject to "stall" (see 3 below). In such cases, GT Series PowerTraps are required. GT Series PowerTraps are steam traps that feature a pump function.			GT Series	PowerTraps

*2 Operating pressures vary between different models of the same series. For details please refer to individual Specification Data Sheets (SDS).

Trace and Tank Coils

Trace and Tank Coils	Product Features Models categorized as "energy saving" have minimal steam loss Tight seal even under minimal load Operation not receptive to environmental influences (wind, rain/snow) Special Features for Measurement Instruments Small and lightweight construction
End-usage	Control Temperature Category	Remark	Series	Further Reference
Insulation jackets	-	-	SS Series	Free Float® Steam Traps for Main Lines
			L Series	Thermostatic Steam Traps
			A3N	Disc-Type Steam Traps
			P Series	Disc-Type Steam Traps
		QuickTrap with universal connector	FS Series	Free Float® Steam Traps for Main Lines
			FL Series	Thermostatic Steam Traps
			FP46UC	Disc-Type Steam Traps
Pipe trace heating	Controlled temperature above 80°C	-	SS Series	Free Float® Steam Traps for Main Lines
			L Series	Thermostatic Steam Traps
			A3N	Disc-Type Steam Traps
			P Series	Disc-Type Steam Traps
		QuickTrap with universal connector	FS Series	Free Float® Steam Traps for Main Lines
			FL Series	Thermostatic Steam Traps
			FP46UC	Disc-Type Steam Traps
	Controlled temperature up to 80°C	Utilizes sensible heat	LEX3N-TZ	Temperature Control Steam Traps
Instrumentation trace heating	Controlled temperature above 80°C	-	P21S ver.C	Disc-Type Steam Traps
			P46S	Disc-Type Steam Traps
			LV Series	Thermostatic Steam Traps
	Controlled temperature up to 80°C	Utilizes sensible heat	LEX3N-TZ	Temperature Control Steam Traps

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Thermostatic Steam Traps

Product Details

L21S

L32S

LV13L

LV13N

LV21

FL21 QuickTrap®

FL32 QuickTrap®