Which material type is best suited for your oil seal application?February 9, 2015 REDWIRE is news you can use from leading suppliers. Powered by FRASERS.
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With thousands of oil seals to choose from, how do you know which is the correct style, size and material for your application? Daemar can help.
The Oakville, Ont.-based company provides seals in a variety of material types, including Buna-N (Nitrile) rubber, Viton (fluorinated) rubber, EPDM (ethylene propylene diene monomer) rubber, silicone, PTFE (polytetrafluoroethylene) and polyacrylate. Each comes with its own advantages and, sometimes, disadvantages.
- Nitrile rubber – Nitrile rubber is the most commonly used material for oil seals. It has a strong resistance to oils, salt solutions, hydraulic oils and gasoline. It can operate at temperatures between -40 and 120 degrees C. It’s important to note, however, that nitrile rubber has a poor chemical resistance.
- Polyacrylate rubber – This is an acrylic rubber with a better heat resistance than nitrile rubbers. It can operate at temperatures ranging from -20 and 150 degrees C. This material should not be used with water or temperatures below -20 degrees C. Polyacrylate is a good choice for high surface speed environments.
- Silicone rubber – Functioning in temperatures as low as -50 degrees C and as high as 180 degrees C, silicone rubber oil seals are unsurpassed in their tolerance to heat and cold. They have a high lubricant absorbency, which minimizes friction and wear, making it the ideal choice for crack shafts seals. Silicone, however, has a poor hydrolysis resistance. It is not the material of choice for oxidized or hypoid oils.
- Fluorinated rubber (Vitron) – This rubber has the best resistance to chemicals and a superior performance at high temperatures, but it is also the most expensive.
Not sure which material best suits your application? Daemar has a 30-year reputation for high-quality products and excellent service, and the experience to guide its customers to the appropriate choice.
“We offer a range oil seals in both metric and imperial measurements to fit your needs. Our rotary shaft oil seals will extend the life of your bearing systems while reducing maintenance costs,” the company says. “Aside from allowing your bearings to retain optimal lubrication, our rotary oil seals will keep contaminants out of your system.”