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MIL-PRF-680: What Is the Difference Between Type I and Type IV?

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Parts cleaning is a critical process that allows machinery companies to ensure that vital machinery lasts until the end of its projected lifespan. This process is necessary because during machining operations, natural contaminants including dirt, grease, and dust accumulate on the surface of the machine. If the machine is not properly maintained, these contaminants will build up so much that they can actually affect the machine’s ability to work properly. Companies therefore clean these machines regularly to ensure that they will still be functional for key processes. Although the cleaning method used will depend on the type of machine being cleaned and the type of contaminant being removed, all parts cleaning operations will involve degreasers. These substances are a mainstay in parts cleaning because they are the most effective chemicals for removing problematic contaminants.

It is important for companies to use the right degreasers for each piece of machinery, as each chemical is formulated to work within a specific temperature range. The Department of Defense (DoD) wanted to ensure that its machines are cleaned properly, so it created its own classification system to identify military-grade cleaning materials: MIL-PRF-680. This was not the DoD’s first attempt to create a classification system, as the previous version was called P-D-680. This system separated degreasers into three types based on the substance’s flash point, or lowest point at which the substance will vaporize into a flammable gas. P-D-680 substances were not ideal because they were formulated using many harmful ingredients that created toxic waste and contributed to air pollution. Additionally, the substances were dangerous for workers to use because they had a low flash point. Military organizations therefore put individuals at risk when asking them to work with P-D-680 chemicals, as they were both toxic and flammable. Comparatively, MIL-PRF-680 substances are less flammable and safer for industrial usage.

With the implementation of the MIL-PRF-680 system, companies and buyers for government agencies were able to tell the difference between each substance. These parties are able to find the degreasers that meet their cleaning needs based on the needed flash point. The four types of cleaners are:

  • Type I: these solvents have a flash point between 38 and 60 degrees Celsius, and are known to have a low, non-residual odor.

  • Type II: these degreasers carry a flash point between 61 and 92 degrees Celsius, and have a low, non-residual odor just like Type I solvents

  • Type III: these particular solvents are the best option for machines that work at very warm temperatures, carrying a flash point between 93 and 116 degrees Celsius. They also have a low, non-residual odor.

  • Type IV: these substances have a flash point between 61 and 92 degrees Celsius, just like Type II solvents. The difference is that they have a citrus, non-residual odor.

MIL-PRF-680 chemicals are all environmentally friendly, and have been certified as eco-friendly by the Environmental Protection Agency. Organizations that want a safe, eco-friendly, military-grade cleaning chemical should ask distributors of degreasers for MIL-PRF-680 solvents.

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Source by Johnathan D. Smith