Buna O Ring Material

Viton is the choice over buna for high temperature applications.

Buna o ring material.

This popular o ring material family comparison shows basic rubber material family properties and performance plastic properties. It is normally the least expensive of the rubber types we will discuss here. O ring material quick reference guide rubber sealing materials. Buna n sometimes shortened to just buna is a trade name for nitrile rubber known internationally as nbr.

O rings made from nitrile are typically used for general sealing purposes which includes sealing of hydraulic fluids petroleum oils water and so on. What is the best o ring material. Buna n o rings also referred to as nbr o rings and nitrile o rings are the most widely used o ring material in the word because of low cost good mechanical performance with resistance to water most basic oils lubricants and some fuels many pneumatic hydraulic systems and the default choice for basic applications. Buna n nbr nitrile.

A synthetic rubber with excellent oil resistance and fair to good chemical resistance. Has an operational temperature range of 40 f to 250 f 40 c to 121 c and a hardness range of 40 90 durometer. 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. Viton seals hold indefinitely at temperatures up to 400 f and can last up to 48 hours at temperatures up to 600 f.

O rings are an integral component in most industrial and mechanical systems. 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. Nitrile elastomers are copolymers of acrylonitrile and butadiene.

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. As a sealing option the crucial difference between buna and viton is the temperature range the materials function in. Buna n o rings buna n o rings. 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.

O ring material family chemical compatibility temperature resistance and other properties all factor in to o ring material selection for an application. Standard durometer is 70. Its versatility makes it an ideal material for o rings seals gaskets and custom molded components for all industries and applications. Buna n also known as nitrile or nbr is a synthetic rubber material.

Which seal for your application.