This European Standard specifies requirements and tests for homogeneous rubbers for dynamic1 seals used in domestic gas appliances of all categories, and in auxiliary equipment mounted or intended to be mounted on such appliances, in contact with combustible gases up to 200 mbar. This standard deals with materials from which are manufactured dynamic seals, such as: - - "O" rings and lip seals - - valve pads 1 Note: Rubber materials for use in diaphragms are considered in EN 278.
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