Marine

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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Contact us for more information on high temperature thermal oils

We provide advice on how to choose the most appropriate oil for your heat transfer applications and provide our customers with continued technical support.

Call us on +44 (0)1785 760555 for more information

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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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Contact us for more information on high temperature thermal oils

We provide advice on how to choose the most appropriate oil for your heat transfer applications and provide our customers with continued technical support.

Call us on +44 (0)1785 760555 for more information

Marine applications need heat transfer fluids that can perform at the required temperatures for prolonged periods. All heat transfer oils tend to degrade over time, and the rate of degradation increases when the operational temperature exceeds that of the oil’s recommended use.

At high temperatures, the bonds between hydrocarbon chains start to break. The result is the production of carbon in a process called fouling. As the carbon concentration in the fluid increases, it deposits as a sludge into the pipes, reducing the efficiency of the heat transfer system. If action is not taken, this sludge can obstruct the pipes and lead to serious safety hazards.

It’s important to choose a thermal fluid with a high thermal stability, which can better resist high temperatures and occasional temperature peaks. This can slow down degradation, preventing the formation of sludge.

Degradation also contributes in reducing the fluid’s flash point, which is the temperature at which the vapours produced by a fluid will ignite in the presence of an ignition source. When an HTF degrades, its molecules decompose to low boiling fractions known as light ends, resulting in reduced flash and fire points.

As a consequence, it’s important to choose a heat transfer fluid with a high flash point, as in hard-to-monitor applications such as large vessels, it’s essential to minimise the risk of fire.

By monitoring heat transfer fluids regularly, it is possible to slow down degradation and oxidation, keeping marine applications running efficiently and cost-effectively. Ideally, any vessel using heat transfer fluids should operate using a proactive maintenance plan such as Global Heat Transfer’s Thermocare, that encompasses regular system analysis, fluid top-up and careful flashpoint and fouling management.

Additionally, the Heat Transfer Fluid Sample Kit can be very useful for vessels in remote locations at sea, which might be hard to reach for a maintenance engineer. The kit provides everything you need to draw a live, hot representative fluid sample in preparation for accurate analysis, including labelled containers to return the fluid to our lab. After the analysis, a member of our technical team will contact you to discuss the results and advise you on the next steps. The Heat Transfer Sample Kit can be supplied as part of your Thermocare program.

The DSEAR and ATEX regulations are concerned with protecting workers against risks from fire, explosion and similar events arising from dangerous substances present in the workplace, including thermal fluids.  These regulations apply to every industry that uses heat transfer systems, and employers in the marine industry must also adhere to them.

At Global Heat Transfer, we take regulatory compliance seriously. We always aim to ensure that our team and our customers are aware of and comply with relevant laws, and regularly research and analyse specification, policy, standard and law in relation to thermal fluid and thermal fluid management.