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