Nitrile rubber nbr o rings also known as buna n are one of the most commonly used sealing elastomers due to resistance to petroleum based fuels and lubricants and its relatively low price.
Buna o ring material.
O rings made from nitrile are typically used for general sealing purposes which includes sealing of hydraulic fluids petroleum oils water and so on.
Buna n sometimes shortened to just buna is a trade name for nitrile rubber known internationally as nbr.
Viton seals hold indefinitely at temperatures up to 400 f and can last up to 48 hours at temperatures up to 600 f.
It is normally the least expensive of the rubber types we will discuss here.
O rings are an integral component in most industrial and mechanical systems.
Buna n o rings buna n o rings.
Buna n nbr nitrile.
Buna n also known as nitrile or nbr is a synthetic rubber material.
Nitrile buna n o ring the material nitrile also known as buna n or acrylonitrile butadiene rubber functions at a temperature range of between 65 f and 300 f.
O ring and rubber seal materials.
As a sealing option the crucial difference between buna and viton is the temperature range the materials function in.
A synthetic rubber with excellent oil resistance and fair to good chemical resistance.
O ring material family chemical compatibility temperature resistance and other properties all factor in to o ring material selection for an application.
This popular o ring material family comparison shows basic rubber material family properties and performance plastic properties.
Its versatility makes it an ideal material for o rings seals gaskets and custom molded components for all industries and applications.
Standard durometer is 70.
Nitrile elastomers are copolymers of acrylonitrile and butadiene.
O ring material quick reference guide rubber sealing materials.
Because o ring material selection is driven by an industrial or mechanical system that system will define which material is best suited to fulfill the application requirements of the o ring.
Buna nitrile o ring material description.
Viton is the choice over buna for high temperature applications.
O ring materials compatible with ammonia anhydrous select a material to show its compatible chemicals aflas 0 buna n nitrile 3 butyl 4 chemraz 3 epichlorohydrin 0 ethylene propylene 4 fluorocarbon 1 fluorosilicone 1 hypalon 0 kalrez 4 natural rubber 1 neoprene 4 nitrile hydrogenated 3 polyacrylate 1 polysulfide.
Which seal for your application.
Therefore the best o ring material is the material best suited for the application.
Nitrile is unique among synthetic rubbers in that it is generally resistant to chemicals such as oil and fuel among other substances such as mineral and vegetable oils diluted acids.
