This EN specifies the minimum requirements for elastomeric materials intended to be used as static seals, dynamic seals or diaphragms in the gas pressure regulators covered by EN 334 and in the safety devices for gas pressure regulating stations and installations covered by the corresponding ENs, as well as the relevant test methods to assess these requirements. This EN applies to elastomeric materials for use with gases of the first and second gas families to EN 437, for inlet pressures 100 bar, and in an operating temperature range between -10? (or -20?when applicable), and +60?#,,#