Buna n nbr nitrile. Rubber properties the chart below is intended to help in the material selection stage of designing rubber parts products.
Chloroprene Neoprene Epdm Or Silicone To Suit Your Specific
Buna n vs epdm. About us success stories contact us. Which seal for your application. Rubber properties neoprene epdm buna n silicone sbr butyl natural rubber gu. Nbr is compatible with petroleum fluids including dinosaur and synthetic lubricating oils pure gasoline and diesel fuel. Buna n sometimes shortened to just buna is a trade name for nitrile rubber known internationally as nbr. Epdm which stands for ethylene propylene diene monomer has its own set of properties that make it an extremely popular o ring material.
It is normally the least expensive of the rubber types we will discuss here. 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. Poor resistance to petroleum based fluids. Meanwhile buna is only effective in the same manner up to 250f and is the better option for low temperature seals as low as 30f. Epdm viton or buna n.
Epdm rubber is used in applications that demand both flexibility and ruggedness. Ethylene propylene 40 f 300 f. Mineral oils and solvents aromatic hydrocarbons. Viton seals hold indefinitely at temperatures up to 400f and can last up to 48 hours at temperatures up to 600f. Temperature tolerance chemical compatibility and cost. Epdm ethylene propylene diene monomer is a specially designed synthetic rubber for water applications.
Epdm is not resistant to hydrocarbon solvents and oils chlorinated hydrocarbons turpentine or any other petroleum based oils. Nitrile butadiene 30 f 250 f. It is ideal for temperature ranges of 40f to 250f. Rubber compounding is a very broad and technical field since basic rubbers or elastomers are mixed with various chemicals and. Made from odorless and tasteless compounds it can be wisely used in both specialty and general purpose applications. Buna which is also known as nitrile buna n perbunan or nbr performs well in applications requiring metal adhesion and abrasion resistance.
The major weakness of epdm rubber washers and other seals is that they break down and deliver poor sealing performance in systems handling petroleum based fuels oils and solvents. Animal and vegetable oils ozone strong and oxidizing chemicals. Excellent ozone chemical and aging resistance. Buna n is also commonly identified as nbr nitrile or hycar. When comparing viton vs. Continue reading for the full comparison.
Page 1 of 2. Nitrile rubber nitrile rubber also known as buna n is made by combining the polymers butadiene and acrylonitrile. Viton is the choice over buna for high temperature applications. We offer three different premium gasket materials for our steel storage tanks. Selecting the proper gasket material can make a significant difference in the lifespan of the tank. Buna n b rated for temperatures 0f to 180f.
Gallery of Buna N Vs Epdm
