When purchasing a bolted steel tank from superior tank customers have several choices of gaskets. O ring material family chemical compatibility temperature resistance and other properties all factor in to o ring material selection for an application.
Phelps Style 8400 Custom O Rings Phelps Industrial Products
Epdm vs buna o ring. When comparing viton vs. Has an operational temperature range of 40f to 250f 40c to 121c and a hardness range of 40 90 durometer. Ep copolymers must be peroxide cured while epdm polymers can be cured via sulfur or peroxide. O ring material quick reference guide rubber sealing materials. Buna n viton and epdm. Excellent ozone chemical and aging resistance.
Selecting the proper gasket material can make a significant difference in the lifespan of the tank. Temperature tolerance chemical compatibility and cost. Animal and vegetable oils ozone strong and oxidizing chemicals. Viton is the choice over buna for high temperature applications. About us success stories contact us. A synthetic rubber with excellent oil resistance and fair to good chemical resistance.
Viton seals hold indefinitely at temperatures up to 400f and can last up to 48 hours at temperatures up to 600f. The term buna n is really not much more specific than the term steel. Nitrile butadiene 30 f 250 f. Epdm several factors must be considered. 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.
Ethylene propylene 40 f 300 f. While this is important information in terms of o ring manufacturing this difference is transparent to the end user. Rubber compounding is a very broad and technical field since basic rubbers or elastomers are mixed with various chemicals and. Epdm ethylene propylene diene. Poor resistance to petroleum based fluids. Rubber properties the chart below is intended to help in the material selection stage of designing rubber parts products.
Epdm seals are resistant to mild acids detergents silicones glycols ketones and alcohols and can handle temperatures from minus 22 degrees fahrenheit up to. Continue reading for the full comparison. Epdm viton or buna n. 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. Epdm which stands for ethylene propylene diene monomer has its own set of properties that make it an extremely popular o ring material.
Epr specifically refers to ep copolymer while epdm refers to ep terpolymer. We offer three different premium gasket materials for our steel storage tanks. Mineral oils and solvents aromatic hydrocarbons. Rubber properties neoprene epdm buna n silicone sbr butyl natural rubber gu. Which seal for your application. As a sealing option the crucial difference between buna and viton is the temperature range the materials function in.
Family of rubber materials. Note that each type is actually a family of rubber compounds. What is viton a.
Gallery of Epdm Vs Buna O Ring
