Αυτόματοι μεταγωγείς με μέγιστη πίεση εξόδου έως και 4 bar, με παροχή έως και 100 Kg/h και οι σχετικές διατάξεις ασφάλειας, για βουτάνιο, προπάνιο ή μείγματά τους

This EN defines the constructional and operational characteristics, the safety requirements and test methods, the marking, of automatic change-over valves with a capacity of less than or equal to 100 kg/h and having a maximum outlet pressure of less than or equal to 4 bar for butane, propane or their mixtures only in the vapour phase and referred to in the body of the text as "change-over valves". NOTE 1 bar = 105 Pa. Liquefied gases containing methylacetylene and propadiene are not covered by this standard.