NSF H1 Registered Heat Transfer Oil

Product Description

Mobiltherm FM 32 is a high performance white oil-based heat transfer oil intended for use in indirect heating installations where NSF H1 registered lubricants are required. It is formulated to resist thermal cracking and chemical oxidation which helps to enable a long service life and a low propensity for deposit and sludge formation.
The viscometrics of Mobiltherm FM 32 have been carefully selected to help provide effective heat transfer and maximize system efficiency.
Mobiltherm FM 32 has been designed to have good heat transfer properties such as specific heat and high thermal conductivity that help provide rapid heat dissipation that can lead to increased efficiency of the whole system.
Mobiltherm FM 32 is NSF H1 and HT1 registered (reg. no. 174447) and is therefore suitable for applications where incidental food contact may occur and is manufactured at ISO 22000 certified facilities, proving that the highest levels product integrity are maintained. It is also suitable under Kosher (Parve) and Halal dietary law and is formulated to be free from nuts, gluten, wheat and animal products. It meets DIN 51522 heat transfer fluids requirements and testing.
Mobiltherm FM 32 is part of a wide range of NSF H1 registered lubricants from ExxonMobil for the food and beverage processing industry.

Features and Benefits

Applications

Handling and Storage Recommendations
It is recommended that Mobiltherm FM 32 should be stored indoors and segregated from other non-H1 lubricants. Ideally, it should be stored in a clearly signed, separate, designated indoor area. Drums and pails should not be stacked below or above other non-H1 lubricants. New packaging should be free from damage with an unbroken seal. Record the delivery date, batch number and expiration date.
Record the date of initial seal breakage and use the contents in time by suitable stock rotation. Close all package openings after use. Do not replace unused oil in the container. Use clearly labeled, dedicated equipment for internal transportation. Label machinery with the name of the correct H1 lubricant where appropriate.
While Mobiltherm FM 32 may be physically compatible with other NSF H1 or non-NSF H1 registered mineral oil based heat transfer oils, a mixture may detract from its performance and also from its NSF registration status. Consequently it is recommended that before changing a system to Mobiltherm FM 32, it should be thoroughly cleaned out and flushed to achieve the maximum performance benefits and to comply with NSF H1 registration.
Heat Transfer System Applications
Mobiltherm FM 32 is recommended for heating and cooling systems in a wide range of food processing and food contact applications where a NSF H1 registered fluid is required. These include meat, fish and beverage processing, food packaging, ready-to-eat and convenience foods and animal food production. If it sprays or escapes from leakage points, hot Mobiltherm FM 32 fluid may spontaneously ignite.
In closed systems, maximum bulk operating temperature is 300°C with maximum film temperature of 315°C.
Maximum operating temperatures of the fluid are dependent on the duration of exposure to higher temperatures (which can vary due to the design of the system, flow rates, etc). Please consult your original equipment manufacturer to ensure proper operation. In addition, the following conditions are recommended: 1) Maintain turbulent flow through the heater with Reynolds number greater than 10,000; 2) take steps (as directed by
heater OEM) to avoid localised areas of high heat flux, which can lead to locally high film temperatures in the heater and shorten fluid life; 3) nitrogen blanketing to minimise exposure of the fluid to oxygen, which can lead to shorter fluid life.
Periodic used oil analysis and monitoring of Mobiltherm FM 32 in service is recommended to maximize its working life. An initial check of fluid condition is recommended one month after filling the system with Mobiltherm FM 32 and ongoing fluid analysis is recommended at maximum 12 month intervals.
Incidental Food Contact FDA 21CFR 178.3570
Mobiltherm FM 32 is NSF H1, HT1 registered which means that it meets the requirements of 21 CFR 178.3570 for use a lubricant where there is a possibility of incidental food contact. It is not to be used as a direct food contact lubricant.
Mobiltherm FM 32 can also be used in closed heating heat transfer applications in a range of other industrial sectors, such as chemicals, pharmaceuticals and plastics.

Properties and Specifications

Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.

07-2026

ExxonMobil Lubricants & Specialties Europe, division of ExxonMobil Petroleum & Chemicals BVBA. 
This information relates only to products supplied in Europe (including Turkey) and the Former Soviet Union.

EXXONMOBIL LUBRICANTS & SPECIALTIES EUROPE, A DIVISION OF EXXONMOBIL PETROLEUM & CHEMICAL, BVBA (EMPC) 
POLDERDIJKWEG 
B-2030 Antwerpen
Belgium

Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification.  Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations.  The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit www.exxonmobil.com
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.