For the purposes of this article we will focus on just three common rubber types found in o rings and similar automotive seals. This popular o ring material family comparison shows basic rubber material family properties and performance plastic properties.
O Ring For Apc Efc12 Lc Plc Plc12 Ns4 And Breakaway Series Coupling Inserts Epdm
Epdm vs buna o ring. Nitrile butadiene 30 f 250 f. Animal and vegetable oils ozone strong and oxidizing chemicals. O ring material family chemical compatibility temperature resistance and other properties all factor in to o ring material selection for an application. Buna n viton and epdm. Epdm ethylene propylene diene. Rubber properties the chart below is intended to help in the material selection stage of designing rubber parts products.
Selecting the proper gasket material can make a significant difference in the lifespan of the tank. What is viton a. Page 1 of 2. 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. As a sealing option the crucial difference between buna and viton is the temperature range the materials function in. Epdm several factors must be considered.
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. Ep copolymers must be peroxide cured while epdm polymers can be cured via sulfur or peroxide. We offer three different premium gasket materials for our steel storage tanks. Epr specifically refers to ep copolymer while epdm refers to ep terpolymer. The term buna n is really not much more specific than the term steel.
Viton seals hold indefinitely at temperatures up to 400f and can last up to 48 hours at temperatures up to 600f. O ring material quick reference guide rubber sealing materials. Epdm seals are resistant to mild acids detergents silicones glycols ketones and alcohols and can handle temperatures from minus 22 degrees fahrenheit up to. Epdm which stands for ethylene propylene diene monomer has its own set of properties that make it an extremely popular o ring material. Which seal for your application. Rubber properties neoprene epdm buna n silicone sbr butyl natural rubber gu.
A synthetic rubber with excellent oil resistance and fair to good chemical resistance. Family of rubber materials. While this is important information in terms of o ring manufacturing this difference is transparent to the end user. Temperature tolerance chemical compatibility and cost. Viton is the choice over buna for high temperature applications. Ethylene propylene 40 f 300 f.
About us success stories contact us. Mineral oils and solvents aromatic hydrocarbons. Note that each type is actually a family of rubber compounds. Epdm viton or buna n. Rubber compounding is a very broad and technical field since basic rubbers or elastomers are mixed with various chemicals and. When purchasing a bolted steel tank from superior tank customers have several choices of gaskets.
Continue reading for the full comparison. Excellent ozone chemical and aging resistance. When comparing viton vs.
Gallery of Epdm Vs Buna O Ring
