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Bel-Ray Specialty Lubricants: Tech Notes, Vol 3, Issue 1

January, 2012


Bel-Ray No-Tox® Food Grade Lubricant Technical Bulletin Allergens

Bel-Ray No-Tox® Food Grade lubricants meet the NSF International Registration Guidelines for Proprietary Substances and Nonfood Compounds (2009).  Bel-Ray No-Tox® Food Grade lubricants are acceptable as a lubricant with incidental food contact (H1) for use in and around food processing areas.  Bel-Ray Company Inc. confirms that all Bel-Ray No-Tox® Food Grade products:

  • Meet regulatory requirements including FDA 21 CFR for appropriate use, ingredients and labeling review.
  • Are NSF registered for incidental contact with food H1 or 3H.
  • Are free of all allergens listed under Annex IIIa in Directive 2000/13/EC, as amended by EC Directives 2003/89/EC, 2005/26/EC, 2005/63/EC, 2006/142 EC and 2007/68/EC.
  • Do not contain any natural products derived from animals, nuts or genetically modified organisms (GMOs).
  • Do not contain any animal-derived materials that contribute to bovine spongiform encephalopathy (BSE) and other transmissible spongiform encephalopathies (TSE) including (FSE) Feline Spongiforme Encephalopathy, from animal-derived materials.
  • Do not contain any dairy products or materials derived from dairy sources.
  • Do not contain soya, lanolin, sesame oil or materials derived from these sources.

NSF registration letters for each Bel-Ray No-Tox® product can be obtained by logging on to or by logging onto the Bel-Ray website at

All Bel-Ray No-Tox®Lubricants are Kosher and Pareve approved as well as Halal certified.


Bel-Ray Moto Chill Racing Coolant

Coolant for water cooled motorsports engines is available in two forms, ethylene glycol and propylene glycol.  Bel-Ray Moto Chill Racing Coolant (99410) is a special non-toxic propylene glycol formula designed for better heat transfer and cooler running engines. It protects cooling systems from corrosion including those with magnesium and aluminum components. Bel-Ray Moto Chill Racing Coolant is a pre-mix 50/50 mixture of propylene glycol and distilled water referred to as PGW.

With proper antifreeze mixture a wide temperature range can be tolerated by the engine coolant, such as -29.2°F (-34°C) to +267 °F (131 °C) for 50% (by volume) propylene glycol diluted with water and a 15 psi pressurized coolant system.

Ethylene glycol, EGW solutions formulated for the automotive industry often have silicate based rust inhibitors that can coat and/or clog heat exchanger surfaces. The use of PGW as a coolant is becoming more common primarily because it is environmentally friendly and non-toxic. Ethylene glycol is listed as a toxic chemical requiring care in handling and disposal.

Specific Heat

The specific heat of the coolant mixture is an important aspect to understand.  Specific heat is defined as the amount of heat necessary to raise a fixed amount of water one degree. The specific heat of water is 1 which is the highest for any liquid. In the graph to the right we can see that the specific heat of the EWG 50% and the PWG 50% changes as the temperature changes. The higher the specific heat value the more heat the coolant can absorb. The PWG 50% mixture has a higher specific heat at the higher temperature range providing a better heat absorbing coolant compared to EWG 50%.

Surface Tension

The relationship of surface tension to your cooling system is subtle, but critical. There are points in your engine which are hotter than others, such as the area around your exhaust valves. When water hits one of these areas, it is quickly heated to the boiling point. A small bubble of water vapor is formed. This is called nucleate boiling. Once the bubble is formed, we’d like it to disperse so that additional liquid coolant can reach the hot spot. But the surface tension of the surrounding fluid resists until the bubble is large enough and energetic enough to break away from the surface. Reducing surface tension is a very important goal in coolant selection.

Propylene Glycol has the lowest surface tension of the available coolants, which will get the coolant to the surface where it is needed as fast as possible.

Boiling Point

The boiling point of an element or a substance is the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid. A 15 psi (1.03 Bars) radiator cap installed on the coolant system will increase the boiling point of the coolant solution by around 45°F (25°C). The boiling point of EGW 50% with a 15 psi cap is 270°F (132°C).

The boiling point of PGW 50% with a 15 psi cap is 267°F (131°C). Both EWG and PWG provide similar boiling points under pressure.

Freeze Point

The freeze point or the point where the coolant solution starts to freeze is slightly higher for PGW compared to EGW. A 50% PGW solution will start to freeze at -29.2°F (-34°C). A 50% EGW solution will start to freeze at -34.6°F (-37°C).

The characteristics of ethylene glycol and propylene glycol can be compared in the table below.

Property Ethylene Glycol Propylene Glycol Comments
Specific Heat Less Better Higher specific heat, better heat absorbing
Surface Tension Higher Lowest Lower surface tension allows the PWG
to get to the hot surface and cool better.
Heat transfer
Less Better Ethylene glycol can’t carry as much
heat as propylene glycol. More fluid
must be circulated to transfer the same
amount of energy. Pump’s volume
Boiling Point Same Same No clear advantage. Both provide boiling
points around 270°F (130°C)
Freeze point
More effective Less Effective More antifreeze is needed for propylene
glycol to achieve the same
level freeze point PGW 50% provides
-29.2°F (-34°C) freeze protection.
Toxic High level of acute
toxicity when taken
orally; targets kidneys.
Non-Toxic Propylene glycol is non-toxic and will
not harm humans, pets or the environment.


Bel-Ray Breaks Into Eco-friendly Mining with New Biodegradable Rock Drill Oils

One of the most significant problems facing the mining industry is possible contamination of the environment due to equipment spillage or leaks. In the case of rock drill application however, it is the lubrication system itself that is the problem. Rock drills utilize a “once –through” method of lubrication where much of the lubricant is lost to the surrounding soil and water. For petroleum- based rock drill oils there is a greater risk of causing a negative impact on the environment due the low biodegradability of mineral oil. And as environmental regulations increase, the need for biodegradable and eco-responsible rock drill oil becomes imperative.

Traditional solutions to this problem have been to replace mineral oil with vegetable oils, commonly called “seed oils” or “natural esters”. Seed oils have the highest degree of ultimate biodegradability when compared to mineral oils, PAOs, and synthetic esters. Other benefits of vegetable oils include: a high viscosity index, a high flash point, and a good affinity to metal surfaces. However, properties such as high pour point and low thermal stability prevent seed oils from becoming the ideal biodegradable lubricant.

Therein lies the challenge: to formulate a rock drill oil that balances high- performance lubrication and high biodegradability while also remaining non-toxic to the environment.

Bel-Ray has developed a new series of Biodegradable Rock Drill Oil that rises to this challenge. These rock drill oils will be offered in five different ISO viscosity grades to accommodate a broad range of temperatures for various drilling applications in the fields of mining, quarrying, forestry, and outdoor construction. This new series of Rock Drill Oils come equipped with all the many properties expected of ecofriendly rock drill oil:

Extreme Pressure and Antiwear Properties: Designed for a high load carrying capacity to prolong equipment performance.

Emulsibility: Provides excellent film lubrication in wet environments.

Corrosion Resistance: Moving parts are well protected from corrosion to extend component life.

Tackiness: Lubricant resists “fling-off” during high speed operation.

Biodegradability: Product has an ultimate biodegradability of over 60 % (ASTM D 5684) this lubricant meet the most stringent of biodegradability requirements.

This is only the beginning of what Bel-Ray will offer for it’s customers lubricant needs. The January 2012 launch of this rock drill series, and other new and upgraded biodegradable products, will certainly propel Bel-Ray into the future of eco-friendly lubricant technology.