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