High temperature heat transfer fluids

Application

Non-toxic and non-flammable heat transfer media. Globaltherm^® Omnistore MS-600 is the high temperature heat transfer media for Concentrated Solar Power (CSP) and thermal electricity storage applications.

About Globaltherm® Omnistore MS-600

• Globaltherm® Omnistore MS-600 – is a molten salt heat transfer media used in solar thermal storage applications at very high temperatures.

• Omnistore MS-600 can safely withstand temperatures up to 600°C (1076°F), higher than most heat transfer media on the market today.

• Globaltherm® Omnistore MS-600 molten salt  heat transfer media has excellent thermo-physical properties in the liquid state, such as low viscosity, high heat capacity, and high thermal conductivity. Globaltherm’s heat transfer molten salts provide long-term heat storage for high-temperature applications.

• Globaltherm® Omnistore MS-600 minimises safety hazards and the need for high-pressure equipment.

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Parameter	Unit	Result
Appearance	N/A	Colourless transparent liquid. White odourless crystal in solid state.
Operating Range	°C (°F)	290 to 600 (554 to 1112)
Density @ 300°C	kg/m³	1899
Absolute Viscosity 300°C	mPa	3.26
Absolute Viscosity 600°C	mPa	0.99
Melting Point	°C	220

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Temperature	Density	Dynamic viscosity	Specific heat capacity	Thermal conductivity
°C	kg/m³	mPa·s	J/(kg·K)	W/(m·K)
300	1899.2	3.2632	1494.6	0.552
400	1835.6	1.7764	1511.8	0.519
500	1772	1.314	1529	0.538
600	1708.4	0.9916	1546.2	0.557

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Application

Non-hazardous, low toxicity, silicone based heat transfer fluid. Globaltherm^® Omnisol is the high temperature silicone based thermal fluid for Concentrated Solar Power (CSP) thermal storage applications.

About Globaltherm® Omnisol

• Globaltherm® Omnisol – is a silicone based heat transfer media used in solar thermal storage applications at high temperatures.

• Omnisol can safely withstand temperatures up to 425°C (797°F).

• Globaltherm® Omnisol delivers the high thermal stability and reliable heat transfer of a polydimethylsiloxane mixture with a low pumpability point of -65°C (-85°F). Globaltherm ® Omnisol is a high performing low toxicity, low fire risk, heat transfer fluid for CSP applications operating up to 425°C (797°F).

• Globaltherm® Omnisol is suitable for use in parabolic trough applications requiring a low freeze point and low temperature pumpability.

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Parameter	Unit	Code (ASTM / ISO / DIN)	Result
Appearance	N/A	Visual	Colourless, odourless, clear
Operating Temperature	°C	-	-40 to 425
Pour Point	°C	DIN ISO 3016	<-55
Boiling Point @ 0,6 hPa	°C	-	> 200
Vapour Pressure @ 25°C	°C	-	NA
Density @ 25°C	kg/m³	DIN 51757	Approx. 0,92g/cm³
Kinematic Viscosity @ 25°C	mm²/s	DIN 51562	4 - 6mm²/s

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General product description	Unit	Code (ASTM / ISO / DIN)	Result
Solubility of water	-	DIN 51777	Max. 130ppm
Acid Number	-	DIN 51558	Neutral
Flash point (open)	°C	ISO 2592	145
Flash Point (closed)	°C	ISO 2719	120
Ignition temperature	°C	EN 14522	376

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Application

Globaltherm^® Omnitech is a high performance synthetic heat transfer fluid designed to meet the demands of liquid or vapour phase systems and indirect heat transfer. The no.1 choice for concentrated solar power and thermal electricity applications, PET and plastics production and chemical industries.

About Globaltherm® Omnitech

Globaltherm^® Omnitech is a synthetic thermal fluid which combines low viscosity and exceptional thermal stability for consistent performance.

• Globaltherm® Omnitech is a diphenyl ether-biphenyl HTF mixture

• The eutectic mixture of diphenyl oxide and biphenylgives this heat transfer fluid flexibility to perform in both vapour and liquid phases. It is miscible and interchangeable (for top-up or dilution purposes) with other similar mix thermal fluids.

• Globaltherm Omnitech HTF has low viscosity (2.5 cst at 40°C [104°F])

• This thermal fluid is excellent for use in heat transfer fluid systems which require very precise temperature control due its ability to operate as a vapour phase fluid

• This heat transfer fluid is highly dependable

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Parameter	Unit	Code	Result
Appearance	N/A	N/A	Clear-to-light yellow liquid with a geranium-like odour
Operating range	°C (°F)		15 to 400 (59 to 752) liquid phase. 257 to 400 (495 to 752) vapour phase
Vapour pressure	Psia		152.02
Freeze Point	°C (°F)	N/A	12°C (53.6°F)
Viscosity (at min. use temp)		ASTM D445	4.91
Viscosity (at max. use temp)		ASTM D445	0.13
Flash Point PMC	°C (°F)	ASTM D93	113 (236 °F)
Flash Point COC	°C		123
Coefficient of thermal expansion	°C		0.000979/ °C
Autoignition point	°C (°F)	ASTM E659	599 (1110°F)
Pour point	°C	ISO 3016	11
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	<0.2
Maximum bulk temperature	°C	NTR	400
Maximum film temperature	°C	NTR	425
Boiling point at 1013 mbar	°C (°F)	NTR	257
Average molecular weight	NTR	NTR	166
Moisture content	PPM	ASTM D6304	<300

Note: The information given in the typical data does not constitute a specification but is an indication based on current production and can be affected by allowable production tolerances. The right to make modifications is reserved. This edition supersedes all previous editions and information contained within them. Typical values should not be construed as a guaranteed analysis of any specific lot or as specifications for the product. Abbreviations: OC, open cup test; COC, Cleveland open cup test; and, NTR, no test reported.

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Marlotherm^® LH is a high temperature heat transfer fluid designed for use in closed loop, forced circulation heat transfer systems.

This high performance heat transfer fluid is predominantly used in pharmaceutical and plastics processing.

What are the advantages of Marlotherm® LH?

• The fluid can be used in both liquid and vapour form due to its narrow boiling range of around 4°C

• Marlotherm® LH is a non-corrosive benzyltoluene HTF

• This thermal fluid has low viscosity for excellent heat transfer efficiency

• Marlotherm® LH is a benzyl aromatic with excellent thermal stability

Marlotherm® LH operating temperature

• Marlotherm® LH is recommended for use in the temperature range from -30°C (-22°F) to 280°C (536°F)

• This heat transfer fluid can also be used intermittently at film temperatures as high as 380°C and used in pressurised systems up to 360°C

• Marlotherm® LH has a high auto-ignition temperature of 450°C (842°F)

• This heat transfer fluid has low pour point and a pumping limit of -30°C (-22°F)

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance at 20°C	N/A	Visual	Liquid, clear
Chlorine	ppm	DIN 51408	<10
Acid number	mg KOH/g	DIN EN 2114	<0.02
Density @ 20°C	g/ml	ASTM D 941	0.99 - 1.00
Viscosity @ 20°C	mm²/s	DIN 51562	3.6 - 4.4

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General product description	Unit	Code (ASTM / ISO)	Result
Boiling range at 1013 mbar	°C	ASTM D 1078	about 278 - 282
Pour point	°C	DIN ISO 3016	about -30
Flash point	°C	EN 22719	about 130
Ignition temperature	°C	DIN 51794	about 450
Permissible heater outlet temperature	°C	NTR	360
Permissible heater film temperature	°C	NTR	380
Pumpability limit	°C	NTR	about -30

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Choosing the correct heat transfer fluid

If you want advice on how to choose the optimal heat transfer fluid for your application, get in touch by calling +44 (0)1785 760 555. Find contact details for our offices here.

Application

Globaltherm^® L is a multi-purpose high performance benzyltoluene heat transfer fluid. It is for use in closed loop heat transfer systems. It is used predominantly in pharmaceutical industries and plastic processing and can be used in liquid and vapour form.

About Globaltherm® L

Globaltherm^® L benzyltoluene HTF is recommended for use in the temperature range from -30°C (-22°F) to 360°C (680°F), but can be used intermittently at film temperatures as high as 380°C (716° F). It can also be used in pressurised systems up to 360°C (680°F).

• Multi-purpose HTF in bulk outlet temperature ranges:

• -20°C (-4°F) to 280°C (536°F) in non-pressurised heat transfer systems

• 280°C (536°F) to 680°C (680°F) in pressurised or liquid-vapour heat transfer systems

• Globaltherm® L heat transfer fluid is non-corrosive

• Globaltherm® L can be used in the liquid or liquid/vapour phase due to its narrow boiling range of around 4°C (39°F)

• This heat transfer fluid has low pour point and pumping limit

• -30°C (-22°F)

• A thermal fluid with low viscosity for excellent heat transfer efficiency

• Globaltherm® L is a benzyl aromatic with excellent thermal stability

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance at 20°C	N/A	Visual	Liquid, clear
Chlorine	ppm	DIN 51408	<10
Acid number	mg KOH/g	DIN EN 2114	<0.02
Density @ 20°C	g/ml	ASTM D 941	0.99 - 1.00
Viscosity @ 20°C	mm²/s	DIN 51562	3.6 - 4.4

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General product description	Unit	Code (ASTM / ISO)	Result
Boiling range at 1013 mbar	°C	ASTM D 1078	about 278 - 282
Pour point	°C	DIN ISO 3016	about -30
Flash point	°C	EN 22719	about 130
Ignition temperature	°C	DIN 51794	about 450
Permissible heater outlet temperature	°C	NTR	360
Permissible heater film temperature	°C	NTR	380
Pumpability limit	°C	NTR	about -30

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Application

Marlotherm^® SH is the ideal heat transfer fluid for a range of common applications, such as chemical and plastics processing.

Marlotherm^® SH high temperature heat transfer fluid is designed for use in closed loop, non-pressurised heat transfer systems. It delivers ultimate performance to ensure your system is running at maximum capacity and optimum efficiency.

 

Key facts about Marlotherm® SH

• Marlotherm® SH has an operating temperature range of -5° to 350°C (23°F to 662°F)

• Marlotherm®  SH HTF can be used without being pressurised

• Marlotherm® SH is non-corrosive

• It has a high flash point 200°C – one of the highest in its fluid class

• • It can be used in systems requiring start-up temperatures as low as -5°C (23°F) without the need for heat tracing

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance visual	N/A	N/A	Liquid, clear
Chlorine	ppm	DIN 51408	<10
Acid number	mg KOH/g	DIN EN ISO 2114	≤0.02
Density @ 20°C		DIN 51757	1.04 - 1.05
Viscosity @ 20°C	cSt	DIN 51562	42 - 52

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General product description	Unit	Code (ASTM / ISO / DIN)	Result
Boiling point at 1013 mbar	°C	ASTM D 1078	385 - 395
Pour point	°C	DIN ISO 3016	<-34
Flash point	°C	EN 22719	approx. 200
Autoignition temperature	°C	DIN 51794	approx. 500
Permissible heater outlet temperature	°C	NTR	350
Permissible heater film temperature	°C	NTR	380
Pumpability limit	°C	NTR	approx. -5

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Choosing the correct heat transfer fluid

Thermal fluid specialist Global Heat Transfer stocks and delivers a wide range of premium quality heat transfer fluids, including Marlotherm^® SH. The company also provides the complete solution for global thermal fluid supply and management.

If you want advice on how to choose the optimal heat transfer fluid for your application, get in touch by calling +44 (0)1785 760 555. Find contact details for our other offices here.

Application

Globaltherm^® S is a high performance heat transfer fluid for use in closed loop, non-pressurised heat transfer systems. Primary uses are chemical industries and plastic processing applications.

About Globaltherm® S

Globaltherm^® S is recommended for use in an upper temperature range from 250°C (482°F) to 350°C (662°F), but can be used intermittently at film temperatures as high as 380°C (716° F).

• Globaltherm® S heat transfer fluid is non-corrosive and can be used in non-pressurised heat transfer systems

• This heat transfer fluid can be used in systems requiring start-up temperatures as low as -5°C (23°F) without the need for heat tracing

• Globaltherm® S thermal fluid is thermally stable up to 300°C (572°F) and can be used for several years below this temperature with no adverse impact on performance

• Low viscosity 17cSt @ 40°C (104°F) with a pumping limit at -5°C (23°F)

• This thermal fluid has a high ASTM D93 flash point at 200°C – the highest in class

• Globaltherm® S has high thermal stress resistance in the bulk temperature range  from 60°C-350°C (140°F - 662°F)

• Globaltherm® S has a highly aromatic structure with a boiling point range of 385°C -395°C (725°F -743°F) - the highest in class

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance	N/A	N/A	Liquid, clear
Chlorine	ppm	DIN 51408	<10
Acid number	mg KOH/g	DIN EN ISO 2114	≤0.02
Density @ 20°C		DIN 51757	1.04 - 1.05
Viscosity @ 20°C	cSt	DIN 51562	42 - 52

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General product description	Unit	Code (ASTM/ISO/DIN)	Result
Boiling point at 1013 mbar	°C	ASTM D 1078	385 - 395
Pour point	°C	DIN ISO 6016	<-34
Flash point	°C	EN 22719	approx. 200
Autoignition temperature	°C	DIN 51794	approx. 500
Permissible heater outlet temperature	°C	NTR	350
Permissible heater film temperature	°C	NTR	380
Pumpability limit	°C	NTR	approx. -5

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Application

Globaltherm^® RP Heat transfer fluid is a heat transfer agent suitable for applications requiring single fluid heating and cooling including; oil and gas, heat recovery, plastics, polymers and styrene and chemical processing.

About Globaltherm® RP

• Globaltherm® RP Heat transfer fluid is recommended for use in a temperature range up to a maximum bulk temperature of 660°F (350°C) and a maximum film temperature of 710°F (375°C).

• Globaltherm® RP is a diaryl alkyl composition intended for use in applications that require liquid phase heat transfer.

• Globaltherm® RP fluid can be used in non-pressurised systems, and is pumpable to 0°C (32°F).

• Globaltherm® RP can be used in non-pressurized, liquid phase systems and has good low temperature properties, reducing the need for heat tracing.

• Globaltherm® RP has a high flash point at 194°C (381°F) and delivers excellent thermal stability at the maximum use temperature.

• Globaltherm® RP degrades primarily to low molecular weight products, therefore negating build-up of high molecular weight products that must be removed from the system.

• Globaltherm® RP has a toxicity that is considered to be extremely low.

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Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	-20 to 326 (-4 to 619)
Appearance	N/A	N/A	Colourless transparent liquid with no odour
Density @ 25°C	kg/m³	ASTM D4052	881
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	29.8
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	5.2
Flash Point PMC °C	°C	ASTM D93	210
Flash Point COC	°C	ASTM D92	216
Coefficient of Thermal Expansion	°C	NTR	0.00089/°C
Autoignition Point	°C	ASTM E659	350
Pour Point	°C	ISO 3016	-29
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	NTR
Maximum Bulk Temperature	°C	NTR	326
Maximum Film Temperature	°C	NTR	343
Boiling Point at 1013 mbar	°C	NTR	371
Average Molecular Weight	NTR	NTR	350

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Globaltherm® Syntec: Synthetic heat transfer fluid (-3°C – 345°C)

Globaltherm® Syntec is the most popular synthetic heat transfer fluid for high-temperature operations. Engineered for exceptional performance, it operates efficiently at temperatures up to 345°C (653°F) and can be pumped down to -3°C (27°F).

This versatile thermal fluid is ideal for industries such as chemical processing, plastics manufacturing and biodiesel production, ensuring reliable performance in a wide range of indirect heating systems.

About Globaltherm® Syntec

Globaltherm® Syntec is built using advanced hydrogenated terphenyls chemistry, delivering superior results as a heat transfer fluid.

Designed for optimal thermal stability, this synthetic solution ensures operational efficiency even under demanding conditions. Its high-performance capabilities have made it a trusted choice for industrial fluid systems worldwide.

Whether it's maintaining service life in extreme conditions or maximising system efficiency, Globaltherm® Syntec outperforms traditional alternatives. This product is specifically formulated to help your heat transfer process run at full capacity while minimising maintenance and downtime.

Why choose Globaltherm® Syntec?

• Thermal stability: Engineered for excellent temperature tolerance and minimal degradation

• Operational efficiency: Helps maintain consistent perfor-mance across indirect heating systems

• Versatility: Suitable for a broad range of industries and applications

• Extended service life: Designed to reduce replacement frequency, saving costs over time

• Global reliability: Trusted in systems worldwide for con-sistent, high-level performance

With a proven track record in industrial thermal fluid systems, Globaltherm® Syntec offers unmatched reliability and efficiency. From enhancing the longevity of your heating system to supporting critical operations in high-temperature environments, this synthetic heat transfer fluid is designed to meet the unique demands of modern industries.

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Parameter	Unit	Code (ASTM/ISO)	Result
Appearance	N/A	N/A	Clear to pale yellow liquid with a characteristic odour
Operating Range	°C (°F)	N/A	-3° to 345 (27 to 653)
Density @25°C	kg/m³	ASTM D4052	1005
Kin. Viscosity @40°C	mm²/s (cSt)	ASTM D445	29.6
Kin. Viscosity @100°C	mm²/s (cSt)	ASTM D445	3.80
Flashpoint PMC	°C (°F)	ASTM D93	170 (338)
Flashpoint COC	°C (°F)	ASTM D92	184 (363)
Coeefficient of thermal expansion	°C	NTR	0.000819/°C
Autoignition point	°C (°F)	ASTM E659	374 (705)
Pour point	°C (°F)	ISO3016	-32 (-25.6)
Neutralisation Nr (acid), TAN	Mg KOH/g	ASTM D664	<0.2
Maximum Bulk Temperature	°C (°F)	NTR	345 (653)
Maximum film temperature	°C (°F)	NTR	375 (707)
Boiling point at mbar	°C (°F)	NTR	359 (678)
Average molecular weight	NTR	NTR	252 (485.6)
Moisture content	PPM	ASTM E-203	150 ppm

Technical notes

Note: The data provided represents typical performance characteristics and does not constitute a binding specification. These values are subject to allowable production tolerances and may vary across batches. For detailed technical guidance, contact our expert team. Abbreviations: OC, open cup test; COC, Cleveland open cup test; and, NTR, no test reported.

Contact us for more information on high temperature synthetic heat transfer oils.

 

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Streamline maintenance with Thermocare®

To complement the performance of the Globaltherm® range, the Thermocare® thermal fluid lifecycle maintenance program ensures your system operates efficiently and safely. With tailored packages like essential, optimum and ultimate, Thermocare® offers services ranging from live remote condition monitoring to comprehensive fluid maintenance for a fixed price.

This proactive approach reduces operational costs, enhances system safety and improves productivity through expert heat transfer fluid management.

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Application

Globaltherm^® HF Heat transfer fluid is a heat transfer agent suitable for applications requiring single fluid heating and cooling including; plastics processing, moulding, casting, asphalt, paint and chemicals.

About Globaltherm® HF

• Globaltherm® HF heat transfer fluid’s flash point is one of the industry’s highest at 536°F (280˚C).

• Not only does this heat transfer fluid have one of the highest flash points available it also contains a resilient blend of additives to ensure trouble-free service when managed correctly.

• Globaltherm® HF heat transfer fluid delivers superior resistance to extreme oxidation and sludging found in many manufacturing environments, including plastics processing, molding, casting, asphalt, paint and chemicals.

• This heat transfer fluid is environmentally friendly, non-toxic and non-hazardous and requires no special handling.

• A superior high performance, energy efficient heat transfer fluid suitable for use in a variety of industrial processes.

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Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	Up to 338°C (640°F)
Apperance	N/A	N/A	Clear, colourless liquid
Density @ 20°C	Kg/m³	ASTM 1298	850-880
Kin. Viscosity 40°C	mm²/s (cSt)	NTR	103
Kin. Viscosity 100°C	mm²/s (cSt)	NTR	10.45
Flash Point	°C	ASTM D92	280
Fire Point	°C	ASTM D92	305
Coefficient of Thermal Expansion	°C	NTR	0.1011%
Auto Ignition Point	°C	ASTM E659-78	393
Pour Point	°C	ASTM D97	-9
Maximum Bulk Temperature	°C	NTR	338
Maximum Film Temperature	°C	NTR	360
Boiling Point	°C	NTR	>343
Average Molecular Weight	NTR	NTR	399
Moisture Content	PPM	ASTM D6304	Not Determined

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Application

Globaltherm® NF is a non-fouling, non-toxic, high performance semi synthetic heat transfer fluid specially developed for use in food processing plants and industrial heat transfer.

About Globaltherm® NF

Made from severely hydro treated synthesised hydrocarbon base stocks, Globaltherm^® Non-Fouling has outstanding thermal and oxidation stability allowing operation at high temperatures for extended periods. It is non-hazardous, non-toxic, water white and odourless.

This heat transfer fluid has high flash/fire points and provides extra resistance to sludging.

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Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	-20 to 326 (-4 to 619)
Appearance	N/A	N/A	Colourless transparent liquid with no odour.
Density @ 25°C	Kg/m³	ASTM D4052	881
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	29.8
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	3.2
Flash Point PMC	°C	ASTM D93	210
Flash Point COC	°C	ASTM D92	216
Coefficient of Thermal Expansion	°C	NTR	0.00089/°C
Autoignition Point	°C	ASTM E659	350
Pour Point	°C	ISO 3016	-29
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	NTR
Maximum Bulk Temperature	°C	NTR	326
Maximum Film Temperature	°C	NTR	343
Boiling Point at 1013 mbar	°C	NTR	371
Average Molecular Weight	NTR	NTR	350
Moisture Content	PPM	ASTM D6304	<100

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Application

Globaltherm^® Omnipure is a highly efficient non-toxic, heat transfer fluid that is designed specifically for Concentrated Solar Plant (CSP) and thermal storage applications, PET and plastics production and chemical industries.

About Globaltherm® Omnipure

This heat transfer fluid is made from highly refined mineral oil and has superior oxidation properties for optimum performance.

• Globaltherm® Omnipure thermal  fluid is made from severely hydro-treated base stocks and has outstanding thermal oxidation stability allowing for operation at high temperatures for extended periods.

• Globaltherm® Omnipure is non-hazardous, non-toxic, water white and odourless.

• This heat transfer fluid is specifically developed for non-pressurised, indirectly heated, liquid phase heat transfer systems found in Concentrated Solar Plant (CSP) and thermal storage applications that require bulk temperatures up to 326°C (619°F)

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Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	-20 to 326 (-4 to 619)
Appearance	N/A	N/A	Colourless transparent liquid with no odour
Density @ 25°C	kg/m³	ASTM D4052	881
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	29.8
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	5.2
Flash Point PMC	°C	ASTM D93	210
Flash Point COC	°C	ASTM D92	216
Coefficient of Thermal Expansion	°C	NTR	0.00089/°C
Autoignition Point	°C	ASTM E659	350
Pour Point	°C	ISO 3016	-29
Neutralisation Nr (acid). TAN	mgKOH/g	ASTM 974	NTR
Maximum Bulk Temperature	°C	NTR	326
Maximum Film Temperature	°C	NTR	343
Boiling Point at 1013 mbar	°C	NTR	371
Average Molecular Weight	NTR	NTR	350

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Using Globaltherm® MXT

• Globaltherm^® MXT Heat transfer oil contains a highly resilient blend of additives resistant to sludging and ensures long-lasting and trouble-free service when managed correctly
• This heat transfer oil is a mineral based liquid phase heat transfer oil used for operating at bulk temperatures between -7°C and 320°C in both open and closed circulation.
• Globaltherm® MXT heat transfer oil is resistant to the oxidation and thermal cracking found in many industrial processing environments, including; chemical, pharmaceutical, plastics, paper, wood and textiles.
• Globaltherm® MXT Heat transfer oil is non-toxic and non-corrosive.
• This Heat transfer oil is suitable for a range of indirect open and closed liquid phase industrial heat transfer systems.
• Used oil may be disposed of through a number of environmentally acceptable methods such as used oil recycling or heavy fuels burning.

Talk to us about our all-inclusive reprocessing services.

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance	N/A	N/A	Clear, yellow oil
Operating Range	°C (°F)	N/A	-7°C - 320°C (19°F - 620°F)
Density @15°C	g/cm¯³	ASTM D 7042	0.879
Kin. Viscosity 40	mm²/s¯¹ (cSt)	ASTM D 7042	34.7
Kin. Viscosity 100°C	mm²/s¯¹ (cSt)	ASTM D 7042	5.6
Open Flash Point	°C	ASTM D92	230
Closed Flash Point	°C	ASTM D92	204
Fire Point	°C	ASTM D92	244
Coefficient of Thermal Expansion	°C	NTR	0.1011%
Autoignition point	°C	ASTM E659-78	393
Pour Point	°C	ASTM D97	-9
Maximum Bulk Temperature	°C	NTR	320
Maximum Film Temperature	°C	NTR	360
Boiling Point	°C	NTR	>343
Average Molecular Weight	NTR	NTR	399
Moisture Content	PPM	ASTM D6304	Not Determined

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Application

A superior high performance energy efficient heat transfer fluid suitable for use in all kinds of industrial processes.

About Globaltherm® M

Made from highly refined base stocks, Globaltherm^® M thermal fluid has excellent thermal and oxidation stability allowing operation at high temperatures for extended periods.

The fluid also has efficient thermal conductivity and low viscosity, at the relevant operating temperatures, ensure high heat transfer rates requiring limited pumping energy.

Globaltherm^® M heat transfer fluid provides:

• low vapour pressures at elevated temperatures

• greatly reduced evaporation

• vapour lock and cavitation eliminating the need for high pressure piping and equipment

Used fluid may be disposed of through a number of environmentally acceptable methods such as used oil recycling or heavy fuels burning.

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Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	-10 to 320 (14 to 608)
Appearance	N/A	N/A	Viscous clear-yellow liquid with a mild odour.
Density @ 25°C	kg/m³	ASTM D4052	873
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	29.8
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	4.5
Flash Point PMC	°C	ASTM D93	210
Flash Point COC	°C	ASTM D92	230
Coefficient of Thermal Expansion	°C	NTR	0.00077/°C
Autoignition Point	°C	ASTM E659	360
Pour Point	°C	ISO 3016	-12
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	<0.05
Maximum Bulk Temperature	°C	NTR	320
Maximum Film Temperature	°C	NTR	340
Boiling Point at 1013 mbar	°C	NTR	365
Average Molecular Weight	NTR	NTR	400
Moisture Content	PPM	ASTM D6304	<100

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Application

Globaltherm^® J Heat transfer fluid is a superior high performance, energy efficient heat transfer fluid suitable for use in all kinds of industrial processes.

About Globaltherm® J

• This high performance heat transfer fluid is a mixture of isomers of an alkylated aromatic specially engineered for demanding low-temperature applications in liquid phase pressurised systems.

• Globaltherm® J Heat transfer fluid is a heat transfer agent suitable for applications requiring single fluid heating and cooling.

• This fluid is recommended for use in a temperature range from <-80°C (-112°F) up to a maximum bulk temperature of 315°C (600°F) in the liquid phase.

• This heat transfer fluid can also be used in vapour phase systems operating from 181°C to 315°C (358°F - 600°F).

• This heat transfer fluid offers outstanding low-temperature pumpability and excellent thermal stability for protection against accidental overheating.

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance	N/A	N/A	Clear, colourless liquid
Operating Range	°C (°F)	N/A	<-80°C to 315°C (<-110°F to 600°F)
Density @ 25°C	`kg/m³	ASTM D4052	860
Kin. Viscosity 40°C	mm²/s (cSt)	NTR	0.70
Kin. Viscosity 100°C	mm²/s (cSt)	NTR	0.40
Flash Point (closed)	°C	ASTM D93	57
Fire Point	°C	ASTM D92	60
Autoignition Point	°C	ASTM E659-78	420
Boiling Point	°C	NTR	181
Average Molecular Weight	NTR	NTR	134

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What is Globaltherm ® N?

Globaltherm® N is a synthetic organic heat transfer fluid engineered for superior performance in thermal fluid systems. Designed for use in both liquid and vapour phases, it serves as an effective alternative to traditional mineral or hot oils. This heat transfer fluid is particularly suited for non-pressurised, closed-loop heating systems used in industries such as chemical processing and plastic manufacturing.

Operating efficiently within a temperature range of 150°C to 300°C, Globaltherm® N is known for its exceptional thermal stability, low odour and non-toxic nature. Whether you need a solution for pharmaceutical, plastic processing or other industrial applications, Globaltherm® N offers a reliable, high-performance option.

Why choose Globaltherm® N?

This heat transfer fluid is recommended for use in heat transfer fluid systems operating in the temperature range from 150°C (302°F) to 300°C (572° F).

• Thermal stability: Exceptional resistance to thermal deg-radation ensures reliable, long-term operation in thermal fluid systems

• Temperature flexibility: Operates in the bulk temperature range of 60°C to 300°C and has a pour point of -10°C, eliminating the need for heat tracing during start-up

• Non-corrosive: Reduces maintenance costs and improves the lifespan of your heat transfer system

• Vapour and liquid applications: Suitable for processes requiring both liquid and vapour-phase heat transfer fluids

• Efficient in air-exposed systems: Ideal for applications where complete isolation from air cannot be achieved

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Globaltherm® range overview

The Globaltherm® N, L, S and C range, is tailored to meet the demanding requirements of pharmaceutical and plastic manufacturing processes. These synthetic thermal fluids are designed for high-temperature environments, maintaining stability over prolonged periods without premature degradation.

For example:

• Globaltherm® S: offers the highest boiling point, up to 395°C, making it ideal for extreme heat applications
• Globaltherm® L: Low-temperature fluid for cooling and refrigeration applications
• Globaltherm® C: Dual-phase fluid for flexible performance in both liquid and vapour systems

Each fluid in the range is customised to support specific thermal fluid solutions, improving operational efficiency across various industrial sectors.

Streamline maintenance with Thermocare®

To complement the performance of the Globaltherm® range, the Thermocare® thermal fluid lifecycle maintenance program ensures your system operates efficiently and safely. With tailored packages like Essential, Optimum, and Ultimate, Thermocare® offers services ranging from live remote condition monitoring to comprehensive fluid maintenance for a fixed price.

This proactive approach reduces operational costs, enhances system safety and improves productivity through expert heat transfer fluid management.

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We provide tailored advice to help you select the right synthetic heat transfer fluid for your application. From sampling and monitoring to engineering support, our team ensures you maintain safe and efficient operations.

For expert guidance on thermal fluid solutions and technical support, call us at +44 (0)1785 760555 or get a quote below.  

Application

Globaltherm^® C is an organic stress resistant heat transfer fluid for use in the liquid or vapour phase in closed heat transfer systems with forced circulation.

About Globaltherm® C

Globaltherm^® C can be used in heat transfer systems for use as a liquid in non-pressurised systems from -90°C (-130°F) to 153°C (307°F) and in pressurised systems up to 300°C (572°F).

• This thermal fluid is for use in multi-purpose heat transfer systems where heating and cooling loops must be operated simultaneously

• Globaltherm® C is thermally stable up to 300°C (572°F) and particularly suitable in applications where exposure to air cannot be completely prevented

• This product provides turbulent flow and efficient heat transfer to -90°C (-112°F)

• Globaltherm® C can be used in systems requiring low start-up temperatures from -90°C (-130°F) without the need for heat tracing

• Globaltherm® C operates effectively in non-pressurised systems in the range -90°C - 180°C (-112°F - 356°F)

• This heat transfer fluid is non-corrosive.

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Parameter	Unit	Code (ASTM / ISO / DIN)	Result
Appearance at 20°C	N/A	Visual	Liquid, clear
Ethylbenzene Content	% by volume	GC	≤0.5
Water	% by mass	Din 51777	≤0.03
Density @ 20°C	g/ml	DIN 51757	0.855 - 0.865
Viscosity 20°C	mm²/s	DIN 51562	0.5 - 1.0
Boiling Range at 1013 mbar	°C	ASTM D1078	about 153
Pour Point	°C	DIN ISO 3016	< -90
Flash Point	°C	EN 22719	about 31
Ignition Temperature	°C	DIN 51794 (ASTM D659)	about 420
Permissible Heater Outlet Temperature	°C	NTR	300
Permissible Heater Film Temperature	°C	NTR	320
Pumpability Limit	°C	NTR	NTR

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Application

Globaltherm® 55 is a synthetic heat transfer fluid designed for use in moderate temperature, non-pressurised or low pressure indirect heating systems.

The thermal fluid is designed to provide reliable, consistent heat transfer performance over a long time in a range of applications at recommended bulk temperatures of up to 300 °C (570 °F).  Globaltherm® 55 is recommended for use in industrial applications such as asphalt (bitumen), biomass, cement, gas to liquid, oil & gas, production of bio alcohol and biodiesel, hot mix asphalt, natural gas purification, polymer and plastic and waste heat recovery.

About Globaltherm® 55

Globaltherm® 55 is a synthetic thermal fluid with excellent pumpability (-28 °C [-18.4 °F]), when compared to other heat transfer fluids, allowing the heat transfer system to start up quickly and easily.

• Globaltherm® 55 is used for applications operating from -28 °C (-18.4 °F) to 300 °C (570 °F). It’s broad temperature range means it can be used for both heating and cooling.

• Globaltherm® 55 can offer long life, reliable, cost-effective performance continuously at 300 °C (570 °F) if required by the application, meaning customers don’t need to over specify their fluids.

• The fluid is designed to be resistant to oxidation and help manufacturers to extend fluid lifespan.

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance	N/A	N/A	Clear, yellow liquid
Operating Range	°C (°F)	N/A	-28 to 300 (-18 to 570)
Density @ 25°C	kg/m³	ASTM D4052	868
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	19
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	3.52
Flash Point PMC	°C	ASTM D92	177 (350)
Coefficient of thermal expanision 200°C	°C	NTR	0.000961/°C
Autoignition Point	°C	ASTM E659	343 (650)
Pour Point	°C	ISO 3016	-54 (-65)
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	<0.05
Maximum Bulk Temperature	°C	NTR	300 (570)
Maximum Film Temperature	°C	NTR	335 (635)
Boiling point at 1013 mbar	NTR	NTR	351 (664)
Average Molecular Weight	NTR	NTR	320
Moisture Content	PPM	ASTM E-203	150

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Global Heat Transfer provides advice on how to extend fluid lifespan and provide business partners with continued technical support.

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About Globaltherm® LT Plus heat transfer fluid

• Globaltherm^® LT Plus Heat transfer fluid is a mixture of isomers of an alkylated aromatic

• Globaltherm^® LT Plus Heat transfer fluid is specially engineered for demanding low-temperature applications in liquid phase pressurised systems.

• This fluid is recommended for use in heat transfer fluid systems operating in the temperature range from -30°C (-22°F) to 250°C (482° F).

• A superior high performance, energy efficient heat transfer fluid suitable for use in all kinds of industrial processes.
• Globaltherm^® LT Plus Heat transfer fluid is suitable for applications requiring single fluid heating and cooling

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Parameter	Unit	Code (ASTM / ISO)	Result
Appearance	N/A	N/A	Clear, colourless liquid
Operating Range	°C (°F)	N/A	-30 to 250°C (-22°F to 482°F)
Density @ 25°C	kg/m³	ASTM D4052	860
Kin. Viscosity 40°C	mm²/s (cSt)	NTR	0.85
Kin. Viscosity 100°C	mm²/s (cSt)	NTR	0.42
Flash Point PMC	°C	ASTM D3828	58
Flash Point COC	°C	NTR	NAN
Coefficient of Thermal Expansion	°C	NTR	NAN
Autoignition Point	°C	ASTM E659-78	420
Pour Point	°C	NTR	NAN
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	<0.05
Maximum Bulk Temperature	°C	NTR	315
Maximum Film Temperature	°C	NTR	NAN
Boiling Point at 1013 mbar	°C	NTR	181
Average Molecular Weight	NTR	NTR	134
Moisture Content	PPM	ASTM D6304	<100

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All heat transfer fluids degrade over time, but this is accelerated at high temperatures. In fact, for every 10°C increase in temperature, the lifespan of a thermal fluid decreases by half. Therefore, if you require high temperature heat transfer, you need a fluid with excellent thermal stability.

High temperature thermal fluids typically have a high boiling point and low vapour pressure to avoid unwanted vaporisation. They also have a high flash point and high fire point to minimise fire risk and ensure the safety of staff working in the facility.

We offer a wide range of heat transfer fluids with different operating temperature ranges because we understand that every industrial process has specific temperature requirements. Our liquid phase thermal oils are suitable for systems operating at 15°C to 400°C and our vapour phase heat transfer fluids can operate at 257°C to 400°C.

Your choice of fluid will depend on your application. Identify the temperature range you need it to operate at, whether it will be used in an open or closed heat transfer system and the safety requirements.

Manufacturers should also consider factors such as operating temperature range, thermal stability and the chemical composition of the thermal fluid. They should also decide whether to use a mineral or synthetic heat transfer fluid.

If you need a heat transfer fluid that meets the demands of liquid phase and vapour phase systems, consider Globaltherm ® Omnitech.

You may also want to consider our most popular thermal oil, Globaltherm ® Syntec, which uses hydrogenated terphenyls chemistry and is suitable for a wide range of applications.