Fkm type a o rings are readily available off the shelf in black or brown color.
Viton rubber compound.
Products made with viton fluoroelastomers retain their flexibility shape and seal when exposed to chemicals and high temperatures.
While viton can be sometimes distinguished from other types of rubber by its often green or brown colour a more reliable test is its density of over 1800 kg m 3 significantly higher than most types of rubber 1010 1520 kg m 3.
The fluorine content of the most common viton grades varies between 66 and 70.
Fkm viton rubber compounds fluorocarbon often referred to as viton rubber offers increased oil solvent and chemical and heat resistance than other common elastomers.
One of the available brands is viton a well known and registered product of the company dupont.
Since then the use of viton fluoroelastomer has spread quickly to many other industries required industrial rubber compounds especially in the automotive fluid power appliance and chemical industries.
The terms viton fkm and fpm often causes confusion in the rubber compound industry.
The fkm polymer is supplied by several polymer suppliers.