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Made of Viton (fluorocarbon elastomer) for use with a variety of chemicals and fuels
Round cross-section to provide a seal between cylindrical overlapping surfaces
Can be used across a wide temperature range from -15 degrees F (-26 degrees C) to 400 degrees F (205 degrees C)
Durometer (hardness) of 75A for resistance to penetration
Meets standards defined by Aerospace Standard AS568A
This Viton O-ring is black in color, round in shape, has a durometer (hardness) of 75A, and is designed for use in a wide variety of sealing applications.
Viton has excellent heat, fuel, and chemical resistance. Viton is acceptable for temperature applications between -15 degrees F (-26 degrees C) to 400 degrees F (205 degrees C). It is compatible for use with non-flammable hydraulic fuels, silicone oil, chlorinated hydrocarbons (trichlorethylene), fuels, aromatic hydrocarbons (benzene) and aliphatic hydrocarbons (propane), as well as high vacuum environments, ozone, and weathering. Viton is vulnerable to low molecular organic acids, ammonia gas, alkalis, amines, glycol-based brake fluids, and super-heated steam.
This Viton O-ring has a shore durometer of 75A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.
O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves and various cylinders. They are circular in shape, with a round cross section and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.
This Viton O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.
In 1982, after graduating with distinction from the Masonry Program of Williamson Trade School, our founder, Andy deGruchy, began practicing his trade. It did not take him long to notice that the Portland Cement-based mortars and other inferior lime products sold in the US and being used to repair historic masonry structures were consistently failing.
Repairs using inferior materials often failed prematurely resulting in work needing to be redone in as little as 10 years. Even if a repair lasted longer, it fell far short of the 100+ -year service life attained from properly installed lime mortars which were historically used worldwide.
A return to traditional materials with a proven track record of service was needed.
After research and networking with other conservators and conservation institutes, Andy was introduced to the Saint-Astier® Company of Perigueux, France. For 170 years, Saint-Astier® has not deviated from their time-honored methods of preparing lime. To this day, their commitment to traditional methodology continues to produce dependable building limes for various types of construction and historic masonry repairs. The iconic nature of Europe’s lasting historic architecture inspired Andy to bring the same great performing materials to the US.
Wanting to use the best and most appropriate materials available, Andy’s company, deGruchy Masonry Restoration, began using Saint-Astier® Natural Hydraulic Lime (NHL) for their restoration projects. This lime, with its unique chemistry, was procured in three strength grades known as NHL 2, NHL 3.5, and NHL 5. Soon after, to meet the need and demand to further serve and supply the entire masonry industry with these world-class materials, LimeWorks.us was born.
LimeWorks.us launched in 1999 and joined with deGruchy Masonry Restoration to bring their exceptional know-how and understanding of lime-based materials and their effective applications to the restoration and sustainable building community.
Today, Andy deGruchy’s work of almost 40 years, including that of LimeWorks.us, is respected in the Americas as the authority on lime mortars, plasters, mineral paints, historic masonry restoration, and construction using “green” earth-conscious materials.
If you are a Professional Masonry Restoration Artisan or a Sustainable Builder, LimeWorks.us can teach you how the right lime-based materials coupled with proper installation methods will bring you ideal end results and more qualified work opportunities.