Excellent ozone chemical and aging resistance. O ring material quick reference guide rubber sealing materials.
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Epdm vs buna o ring. Ep copolymers must be peroxide cured while epdm polymers can be cured via sulfur or peroxide. Family of rubber materials. Note that each type is actually a family of rubber compounds. Which seal for your application. What is viton a. When purchasing a bolted steel tank from superior tank customers have several choices of gaskets.
Continue reading for the full comparison. Epdm seals are resistant to mild acids detergents silicones glycols ketones and alcohols and can handle temperatures from minus 22 degrees fahrenheit up to. Viton seals hold indefinitely at temperatures up to 400f and can last up to 48 hours at temperatures up to 600f. Epdm or ethylene propylene diene monomer is widely used to make o rings washers and other sealing fittings in water and steam lines and in auto and truck cooling and brake systems. Epdm which stands for ethylene propylene diene monomer has its own set of properties that make it an extremely popular o ring material. This popular o ring material family comparison shows basic rubber material family properties and performance plastic properties.
Viton is the choice over buna for high temperature applications. Nitrile butadiene 30 f 250 f. About us success stories contact us. The term buna n is really not much more specific than the term steel. Ethylene propylene 40 f 300 f. A synthetic rubber with excellent oil resistance and fair to good chemical resistance.
We offer three different premium gasket materials for our steel storage tanks. Has an operational temperature range of 40f to 250f 40c to 121c and a hardness range of 40 90 durometer. Poor resistance to petroleum based fluids. When comparing viton vs. Epdm viton or buna n. Rubber properties the chart below is intended to help in the material selection stage of designing rubber parts products.
Temperature tolerance chemical compatibility and cost. Rubber properties neoprene epdm buna n silicone sbr butyl natural rubber gu. While this is important information in terms of o ring manufacturing this difference is transparent to the end user. Epdm several factors must be considered. As a sealing option the crucial difference between buna and viton is the temperature range the materials function in. O ring material family chemical compatibility temperature resistance and other properties all factor in to o ring material selection for an application.
Selecting the proper gasket material can make a significant difference in the lifespan of the tank. Mineral oils and solvents aromatic hydrocarbons. Animal and vegetable oils ozone strong and oxidizing chemicals. Rubber compounding is a very broad and technical field since basic rubbers or elastomers are mixed with various chemicals and. For the purposes of this article we will focus on just three common rubber types found in o rings and similar automotive seals. Buna n viton and epdm.
Epdm ethylene propylene diene. Epr specifically refers to ep copolymer while epdm refers to ep terpolymer. Page 1 of 2.
Gallery of Epdm Vs Buna O Ring
