Heat Transfer Fluids

-  for Thermal Oil Heating Systems


It is extremely important that you use a reliable and a high efficient heat transfer fluid (HTF) for your process heating system.

AB&CO do not wish to suggest specific brands, but due to the above necessity, we present a HTF that we recommend. You can call it a fictive HTF product description with high-lighted features. It will be a guidance for you to find the right brand.

AB&CO can also assist you in this and provide qualified analysis of HTF samples, enable us to advice you about your system condition and possible improvements.

AB&CO experienced engineers can assist you in optimizing your heaters and total system, including estimating costs for new systems.


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AB&CO is an internationally recognized supplier of complete thermal fluid heating systems for high temperature process heating.

The HTF is often specified or approved by most manufacturers of thermal fluid systems and processing equipment that is both electrically-heated and oil / gas-fired.

These efficient fluids are very resistance to extreme heat without decompose  creating sludge inside the piping.

The heat transfer fluids from AB&CO provide precise, uniform temperature control up above 300C in food processing, chemical processing, plastics moulding and extrusion, die-casting, and anywhere closed-loop vented process heating systems are applied.

AB&CO HTF is subject to a comprehensive technical support in worldwide.

Our ongoing fluid analysis program not only establishes the condition of the fluid but can also provide an early warning of problems before they affect maintenance or performance of the system. With our in-depth knowledge of liquid heating systems, we can provide guidance and corrective actions to ensure that your system stays in operation.


Heating by Thermal Oil
ABCO-HTF Features
ABCO-HTF Details

Fluid Fouling
Environmental Safety
Fluid Toxicity
Vapour Pressure

Water in the System
Storing your Fluid
Pre-Cleaning the System
Inerting the System
Charging the System
Fluid Disposal
Fluid Analysis
Quality Control
Technical Assistance
Additional Information
Material Safety Sheet
Thermal Properties




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AB&CO recommendation for most applications :

The "Preferred"
Heat Transfer Fluid




UP TO ~300C (MAX. 310C)



ABCO HTF comprise these features :
    When fouling is a problem, for many applications running on operation temperatures near the limits, and for operation under conditions where power cut-off might happen occasionally or frequently. It is often a problem also for most electrically heated systems. Non-fouling, the odourless fluid won't coat the system's heated surfaces with baked-on carbon when severely overheated. This feature is very topic in many applications within chemical industry.

    When fluid toxicity is a concern. Even though the situation is highly hypothetic, what will happen if the thermal fluid is leaking into the secondary side and contaminate the heated medium ?  The ABCO NF is recognized as a food grade oil. It is harmless even after years of service. This NF feature is relevant in many applications within food industry e.g. frying, spray drying, baking, manufacturing of food ingredience, pharmaceuticals and similar.

    When a reliable and cost efficient operation is a demand. AB&CO offers annual or 6 month analysis of the fluid for determine the condition of the plant, fast supply of add-up of HTF from stock, efficient technical trouble-shooting of the systems by process heating specialists. AB&CO also offers a service contract for any of these features.




The AB&CO HTF heat transfer fluid is highly efficient, thermally stable and cost-effective. Completely non-toxic, it is exceptionally safe to use and is easy to dispose.  Used fluid can be safely combined with spent lubricating oils and recycled locally.  The fluid is specified in a broad variety of applications, world wide. It is tough and durable with a proven record of success under demanding conditions, yet is easy and safe to handle.


Fluid Fouling

Unlike conventional heat transfer fluids, the AB&CO HTF will not cause hard carbon formation on heated surfaces.   Conventional heat transfer fluids, when severely overheated, will produce sooty carbon at the film layer.  Much of this carbon immediately adheres to the heated surface and bakes on, forming a crust.  As layer-upon-layer builds up, heat transfer – and in many cases flow – is impaired.  Although nearly impossible to remove without scraping, sandblasting or using chlorinated solvents, the carbon can ultimately break loose, and large chunks of it can circulate through the system impeding flows and fouling components.  Where fouling is extreme, heater tubing and electrical elements will stress and prematurely fail.  Under similar extreme overheat conditions, the fluid evolves small carbon granules.  These granules remain in suspension and are easily filtered out.


Environmental Safety

The HTF has passed environmental clearance procedures. Fish such as rainbow trout and shrimps were exposed to water-accommodated fractions of the fluid. No organisms died, and there were no ill effects.  In the event of a release, you can use the same simple clean-up procedures employed for light lubricating oils.  Once gathered, the fluid can be combined with spent lube oils and sent to the local oil recycler.  There it can be converted into another useful material, preserving natural resources.  The crystal-clear fluid contains no chlorinated hydrocarbons, aromatics, heavy metals, or sulphur or nitrogen compounds.


Fluid Toxicity

The AB&CO HTF fluid is completely non-toxic.  However do not breathe vapour mists of any fluid (see the Material Safety Data Sheet for further information on these, and other conditions).


Vapour Pressure

The AB&CO HTF fluid has an extraordinarily low vapour pressure – less than 1/3 of an atmosphere at its maximum operating temperature.  This and the fluid’s exceptionally low pressure drop permit the designer considerable latitude in the choice of lower-cost equipment.



The lower a heat transfer fluid’s viscosity is, the less energy will be required to pump it through the system.  ABCO HTF viscosity is among the lowest of available high temperature heat transfer fluids.  This means that less heat surface is needed for a given duty, and that a smaller pump and motor can be specified.  And lower power consumption continues to produce savings year after year.


Water in the System

The AB&CO HTF fluid is manufactured from natural feedstock and offers the same superb metal-coating and lubricating properties as the finest natural oils.  However, any water allowed to stand in piping, components or especially expansion tanks of thermal oil systems can cause severe corrosion.   Because the fluid is immiscible with water (and is also slightly less dense), any water can be easily drained from the system’s low points, or the component’s drain valves.  Crack the low-point valve and allow fluid to drain into a beaker or clear water glass.  If you see a phase separation (one liquid "floating" on top of the other), continue to drain until no separation is observed.


Storing Your Fluid

Containers of heat transfer fluid should be kept in non-hazardous dry areas only.  Until ready for use, the container’s tamper-evident safety seals must remain intact.  Liquids should not be allowed to pool on the tops of steel drums.  In the afternoon and evening when temperatures decrease, the heat transfer fluid will cool and contract slightly.  A partial vacuum is created in the drum, and, if the bung’s O-ring seal is not perfect, liquid standing on the top of the drum can be drawn through, contaminating the fluid.  If drums must be temporarily stored outside, store them on their sides.


Pre-Cleaning the System

For optimal performance of both your system and its heat transfer fluid, we strongly suggest that piping, valves and other components be thoroughly cleaned before installation.  Mill scale, weld spatter and slag, quench oils, protective lacquer and varnish coatings, and dust and dirt can act to degrade the fluid, and can damage pumps and valves.  And lodging in restrictions, these contaminants can easily create the same low flow conditions that cause premature failure of systems and fluid.


Inerting the System

If you are not sure that you keep the temperature in the expansion tank below 70C, you should immediately after completing installation of the system, make an arrangement with purge with inert gas (typically nitrogen).  Such purging can eliminate air and water vapour, and can substantially reduce corrosion.  And while purging, you can leak test the system using simple soap-bubble detection methods.  Finally, when you charge the system, any gas that becomes dissolved in the fluid will be inert, and fluid oxidation at start-up will be almost nil.


Charging the System

When charging the system, we suggest you fill from the bottom (a point near pump suction) using a small positive displacement pump — not the system pump.  Charging from the system’s low point can help reduce trapped air in the system, which will substantially reduce the entrainment of gas bubbles and resultant pump cavitation.


Fluid Disposal

Because AB&CO HTF heat transfer fluids are produced from natural feedstock, they are exceptionally safe to use.  Easy to dispose, used fluids can be safely combined with spent lubricating oils and recycled locally.  AB&CO strongly encourages recycling of used heat transfer fluid to conserve natural resources and to minimize the problem of liquid waste in landfills.


Fluid Analysis

Overheating, oxidation and contamination of your heat transfer fluid can significantly reduce its ability to perform.  Product quality will suffer, and in severe cases considerable damage to your thermal oil system can result.  Periodic analysis of your fluid can allow you to detect problems in the early stages and achieve substantial savings.


Quality Control

We thoroughly test each batch of heat transfer fluid to ensure absolute conformance to tight product specifications.  Each shipment is traceable to its master batch, with test results archived at AB&CO.


Technical Assistance

Our technical expertise is available to you in the conceptual stage, during planning and design, and through system construction, start-up and operation.  We want to work closely with you in the recommendation of proven thermal fluid heating systems, components, supplies and procedures.  We also advise on system cleaning and repair, should these become necessary.  And if your application calls for fluids that we are unable to provide, AB&CO will assist you with the names and phone numbers of competitors’ engineers that can help.


Additional Information

AB&CO has available technical data sheets covering a variety of thermal fluid and system topics including fire prevention, system performance tracking, recommended components, draining, flushing and charging and fluid analysis, among others.  AB&CO will be pleased to forward these to you upon request.


(Preliminary Only ! Note Liability Clause in bottom. Correct and updated MSDS Documents to be acquired upon purchase)

Product Identification

Revision Date:

CAS Number: [number]

TSCA Inventory Status: Included

NFPA Hazard Identification

Degree of Hazard

Health: 0
Fire: 1
Reactivity: 0

Hazard Ratings



Hydrotreated Natural Hydrocarbon [number] No             100.00 OSHA PEL ACGIH TLV None established (see item III below)
None established (see item III below)


Health Effect Information


ABCO NF is non-irritating to the eyes upon direct contact.

NF is not expected to cause any skin irritation upon direct single or repeated and prolonged contact; however, similar chemical composition products applied to the skin of laboratory animals resulted in minimal to slight dermal irritation.

NF has a low vapour pressure and is not expected to present an inhalation hazard at ambient conditions. Caution should be taken to prevent aeroionisation or misting. The permissible exposure limit (PEL) and threshold limit value (TLV) for the fluid as oil mist is 5 mg/m3. Exposures below 5 mg/m3 appear to be without significant health risk.

Ingestion is relatively non-toxic unless aspiration occurs. ABCO-NF has laxative properties and may result in abdominal cramps and diarrhea. See Personal Health Protection section below.


On rare occasions, prolonged and repeated exposure to oil mist poses a risk of pulmonary disease such as chronic lung inflammation. This condition is usually asymptomatic as a result of repeated small aspirations. Shortness of breath and cough are the most common symptoms. Aspiration may lead to chemical pneumonitis which is characterized by pulmonary oedema and haemorrhage, and may be fatal. Signs of lung involvement include increased respiration rate, increased heart rate, and a bluish discoloration of the skin. Coughing, choking and gagging are often noted at the time of aspiration. Gastrointestinal discomfort may develop, followed by vomiting, with a further risk of aspiration.

NTP: No   IARC: No   OSHA: No


Emergency & First Aid Procedures

Immediately flush eyes with large amounts of water and continue flushing for 15 minutes. If fluid is hot, treat for thermal burns and take victim to hospital immediately.

Remove contaminated clothing. If fluid is hot, submerge injured area in cold water. If victim is severely burned, take to a hospital immediately.

ABCO-NF has a low vapour pressure and is not expected to present an inhalation hazard at ambient conditions. If vapour or mist is generated when the fluid is heated or handled, remove victim from exposure. If breathing has stopped or is irregular, administer artificial respiration and supply oxygen if it is available. If victim is unconscious, remove to fresh air and seek medical attention. Do not use compressed oxygen in hydrocarbon atmospheres.

May act as a laxative. Do not induce vomiting due to possible aspiration. If vomiting occurs, lower head below knees to avoid aspiration. Seek immediate medical attention.


Personal Health Protection Information


Eye protection is not required under conditions of normal use. If the fluid is handled such that it could be splashed into eyes, wear plastic face shield or splash-proof safety goggles.

No skin protection is required for single, short duration exposures. For prolonged or repeated exposures, use impervious synthetic rubber clothing (boots, gloves, aprons, etc.) over parts of the body subject to exposure. If handling hot fluid, use insulated protective clothing (boots, gloves, aprons, etc.)

Respiratory protection is not required under conditions of normal use. If vapour or mist is generated when the fluid is heated or handled, use an organic vapour respirator with a dust and mist filter. Do not use compressed oxygen in hydrocarbon atmospheres.

If vapour or mist is generated when the fluid is heated or handled, adequate ventilation in accordance with good engineering practice must be provided to maintain concentrations below the specified exposure or flammable limits.

Consumption of food and beverages should be avoided in work areas where hydrocarbons are present. Always wash hands and face with soap and water before eating, drinking or smoking.


Fire Protection Information





No data

No data


Use dry chemical, foam, water fog, or carbon dioxide.

Water may be ineffective but can be used to cool containers exposed to heat or flame. Caution should be exercised when using water or foam as frothing may occur, especially if sprayed into containers of hot, burning liquid.

Dense smoke may be generated while burning. Carbon monoxide, carbon dioxide, and other oxides may be generated as products of combustion.


Reactivity Data

STABILITY (Thermal, Light, Etc.):   Stable
INCOMPATIBILITY (Materials to Avoid):   May react with strong oxidizing agents.
HAZARDOUS DECOMPOSITION PRODUCTS:   If burned, will produce carbon dioxide and carbon monoxide.


Environmental Precautions

Consult health effect information in Section III, Personal Health Protection Information in Section V, Fire Protection Information in Section VI, and Reactivity Data in Section VII. Notify appropriate authorities of
. Contain release immediately. Do not allow release to enter sewers or water courses; remove all sources of ignition. Absorb with appropriate inert materials such as sand, clay, etc. Large releases may be picked up using vacuum pumps, shovels, buckets or other means and placed in drums or other suitable containers.

All disposals must comply with federal, state and local regulations. The fluid, if spilled or discarded may be a regulated waste. Refer to state and local regulations. Caution: If regulated solvents are used to clean up spilled fluid, the resulting waste mixture may be regulated. Department of Transportation (DOT) regulations may apply for transporting this material when spilled. Waste material may be land filled or incinerated at an approved facility. Materials should be recycled if possible. This material is supplied, is not regulated by RCRA as hazardous waste.

Physical Properties

Boiling Point:    > 230C
Melting Point:   Not applicable
Appearance:   Clear liquid
Odour:   Odourless
Vapour Pressure:   <0,1 kPa @ 20C
Solubility:   Negligible in water. Soluble in hydrocarbons.
Percent Volatile:   Nil @ Ambient Temperature
Vapour Density (Air=1):   >1
Evaporation Rate (EE=1):   <1
Typical Specific Gravity:   Approx. 883 kg/m3 @ 25C
Molecular Weight:   Average Molecular Weight = 350


Shipping Information

Not regulated by D.O.T., no placarding required.



Liability Clause :

AB&CO present the information and recommendations in this bulletin is for guidance only and for introduction to MSDS. All data is estimated and are not to be used for design and safety issues.

AB&CO takes no responsibility for the use of the information.

Correct Updated MSDS Documents is always to be acquired upon HTF purchase.


Properties vs. Temperature - AB&CO HTF  

 See Print-out Edition

 Temperature   Density  Specific Heat   Therm Cond   Dynamic
Vapor Pressure 


 kg/m  kcal/(kgK)   W/(mK)   mPa/sec   kPa 
 0   878.7   0.43   0.1345   195.00   0.00 
 10   874.7   0.44   0.1338   87.00   0.00 
 20   870.6   0.45   0.1331   43.20   0.00 
 30   866.5   0.46   0.1324   23.40   0.00 
 40   862.4   0.46   0.1316   14.80   0.00 
 50   858.4   0.47   0.1309   10.40   0.00 
 60   854.3   0.48   0.1302   7.50   0.00 
 70   850.2   0.49   0.1295   5.66   0.00 
 80   846.1   0.50   0.1288   4.45   0.00 
 90   842.0   0.51   0.1281   3.68   0.00 
 100   838.0   0.52   0.1274   3.09   0.00 
 110   833.9   0.53   0.1267   2.64   0.00 
 120   829.8   0.53   0.1259   2.29   0.00 
 130   825.7   0.54   0.1252   2.00   0.03 
 140   821.7   0.55   0.1245   1.78   0.06 
 150   817.6   0.56   0.1238   1.58   0.10 
 160   813.5   0.57   0.1231   1.43   0.16 
 170   809.4   0.58   0.1224   1.28   0.24 
 180   805.4   0.59   0.1217   1.16   0.38 
 190   801.3   0.59   0.1209   1.05   0.57 
 200   797.2   0.60   0.1202   0.96   0.85 
 210   793.1   0.61   0.1195   0.87   1.26 
 220   789.0   0.62   0.1188   0.80   1.84 
 230   785.0   0.63   0.1181   0.74   2.55 
 240   780.9   0.64   0.1174   0.67   3.57 
 250   776.8   0.65   0.1167   0.62   4.90 
 260   772.7   0.66   0.1160   0.57   6.67 
 270   768.7   0.66   0.1152   0.53   9.17 
 280   764.6   0.67   0.1145   0.50   12.39 
 290   760.5   0.68   0.1138   0.46   16.35 
 300   756.4   0.69   0.1131   0.43   21.63 
 310   752.4   0.70   0.1124   0.39   28.00 
 320   748.3   0.71   0.1117   0.35   37.60 
 330   744.2   0.72   0.1110   0.32   50.00 
 340   740.1   0.72   0.1102   0.28   66.82