Elastomeric seals
This approval requirement specifies requirements for elastomeric materials used in seals for supply pipes and fittings, ancillaries and valves for the supply of gaseous fuels of the 2nd and 3rd family according to EN 437 with operating temperatures in general from - 5 °C up to 50 °C and in special cases from - 15 °C up to 50 °C.
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