- Purex C-18 Cover O-Ring
All of the O-Rings listed here on Bath & Spa Parts Online are manufactured from various sources. All are made from Buna-N material, commonly known as Nitrile rubber, Perbunan, acrylonitrile butadiene rubber, and NBR. It is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. Trade names include Nipol, Krynac and Europrene. The material is made to last under the most extreme conditions. If you have any questions about our o-rings, please feel free to contact our Customer Support Department for more information. Give us a call at 800-918-9143. We can also be reached via chat or e-mail during normal business hours.
WHY USE BUNA-N (NUTRILE RUBBER)?
Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene). Although its physical and chemical properties vary depending on the polymers composition of nitrile, this form of synthetic rubber is unusual in being generally resistant to oil, fuel, and other chemicals (the more nitrile within the polymer, the higher the resistance to oils but the lower the flexibility of the material).