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THERMOCLEAN M mineral flushing oil has a high washing capacity with respect to the hydrocarbon components that make up most of the oily heat transfer fluids, as well as deposits obtained during the thermal degradation of mineral oils. THERMOCLEAN M flushing oil has a low viscosity and low pour point, a relatively high boiling point, which makes it ideal for flushing systems before using mineral heat transfer fluids, especially if there are products of thermal decomposition or oxidation (coking) in the system; in this case, THERMOCLEAN M will dissolve any hydrocarbon oligomeric sludge and sediment formed during the operation of heat exchange systems. The use of THERMOCLEAN M flushing oil before filling the thermal oil system is guaranteed to increase the service life of the thermal oil.

Application areas

THERMOCLEAN M mineral flushing oil is used for washing in various industrial processes for heating or cooling with an intermediate heat transfer fluid for pre-cleaning of the heat exchange system before replacing the mineral heat transfer fluid, which significantly increases the service life of the heat transfer fluid. The flushing oil is particularly effective as a solvent in systems where hydrocarbon oligomeric sludge and sediment (coke) subjected to temperature decomposition or oxidation are present. In all applications of mineral detergent oil THERMOCLEAN M in all the above conditions allows you to reduce the costs associated with troubleshooting.

Features of operation

THERMOCLEAN M flushing oil is highly resistant to decomposition when heated. To capture solid particles already present in the system, as well as any slowly dissolving new substances, at the initial stage of using THERMOCLEAN M flushing oil, it is usually necessary to use mesh filters on the pumps of the cleaning system and bypass filters. THERMOCLEAN M mineral flushing oil does not form a viscous or solid precipitate that could be deposited on the surface of heat exchangers or clog the heat transfer fluid circuit. The oil helps to cope with these problems, however, not all coke dissolves during the use of flushing oil. Part of the coke is washed off the walls of the pipelines and captured by mesh filters.

Compatibility of materials

THERMOCLEAN M mineral flushing oil does not cause corrosion of metals, which are commonly used in heat exchange systems. For flange connections made without welding, seals of the IT-0 type or of fluorinated elastomers can be used. At higher thermal loads and, in particular, at large temperature differences during the working cycle, high-strength graphite seals with metal inserts are successfully used to ensure the tightness of the heat exchange system. To select the optimal sealing material, follow the manufacturer’s recommendations.

THERMOCLEAN M is compatible with almost all well-known brands of mineral oily heat transfer fluids:

Mineral heat transfer fluids Mineral heat transfer fluids
AMT-300, AMT-300T Castrol Perfecto HT2, HT5
Mobiltherm 603, 605, 610 Agip Alaria 3, 5, 7
BP Transcal N, LT Shell Heat Transfer Oil S2
Aral Farolin U Texatherm TEXACO
Total Seriola ETA MOL Termoil

Physical and chemical properties


Transparent liquid

Boiling point, °C


Solidification temperature, °C

Minus 15

Density at 20°C, kg/m3

850 – 960

Kinematic viscosity at 20°C, cSt


Self-ignition temperature, °C

More than 300

Min. temperature for pumping, °C

about – 5°C


THERMOCLEAN M mineral flushing oil is extremely effective for troubleshooting, due to its high solvent capacity, good fluidity in the operating temperature range (no special heating of pipelines is required) and good pumpability at temperatures up to minus 5°C, as well as other advantages:

Does not cause corrosion of structural materials Suitable for various systems
High flash point and spontaneous combustion temperature Difficult-to-ignite substance
Oxidation resistance Allows you to reduce costs
Minimum legal restrictions It is not a substance of increased danger or of limited use

Safety during operation and disposal

In sealed steel containers, the shelf life of THERMOCLEAN M mineral flushing oil is unlimited. No special precautions are required during storage. When filling heat exchange systems from barrels or transporting in bulk, as well as during maintenance of heat exchange systems, the usual precautions are applied to avoid contact of oil with the body.

Do not allow oil to get into the soil or sewer system. The high flash point guarantees minimal risk of fire. Do not allow the THERMOCLEAN M flushing oil to contact an open flame; use foam and dry reagents to extinguish the fire.

Instructions for safe handling of this product are provided for informational purposes only. Detailed and complete information about safety measures when handling the product can be found in the “Safety Data Sheet of the substance”.

Supplies and technical support

The company LLC “NPK “POLYESTER” offers a wide range of effective heat carriers under the trademarks TERMOLAN and detergents and flush oils THERMOCLEAN. TERMOLAN brand products are designed for use in the temperature range from minus 115°C to 400°C. THERMOCLEAN branded products are designed for special applications.

LLC “NPK “POLYESTER” specializes in the production of heat carriers, detergents, as well as indirect heating engineering since 1986 and provides a full cycle of work on the supply of heat carrier:

  • consultation of technologists,
  • selection of the heat transfer fluid subtype,
  • supply of heat transfer fluid,
  • periodic sampling of the heat transfer fluid,
  • control of the key parameters of the heat transfer fluid,
  • recycling/disposal of spent heat transfer fluid.

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    For technical advice and purchase questions, please call +7 (495) 134-35-24 in Moscow.