DVGW O-rings are a type of sealing element used in various industrial applications, particularly in the gas and water supply sector. DVGW stands for Deutscher Verein des Gas- und Wasserfaches, which is a German association for gas and water technology. This association has established standards for O-rings used in gas and water supply systems, which are referred to as DVGW standards.

DVGW o-rings are specially designed for use in gas and water supply systems, which require high levels of reliability and safety. These o-rings must meet certain standards set by the DVGW association to ensure their performance and quality.

DVGW o-rings are made of different types of elastomers, depending on the specific application requirements. Some of the most common elastomers used in DVGW o-rings are NBR (nitrile butadiene rubber), EPDM (ethylene propylene diene monomer), FKM (fluoroelastomer), and HNBR (hydrogenated nitrile butadiene rubber).

NBR o-rings are resistant to oil and fuel, making them suitable for use in gas supply systems. EPDM o-rings are resistant to hot water and steam, making them ideal for use in water supply systems. FKM o-rings are resistant to chemicals, fuels, and high temperatures, making them suitable for use in both gas and water supply systems. HNBR o-rings are resistant to high pressure and temperature, making them ideal for use in gas supply systems.

DVGW o-rings must meet certain performance standards to ensure their quality and reliability. These standards are set by the DVGW association and include requirements for dimensions, hardness, compression set, and resistance to various chemicals and temperatures.