InoxPRES HThttps://www.racmet.com/en-ww/inoxpres-ht.aspxThe HT line differs from the standard version thanks to the presence of the green FKM O‑Ring in the toroidal chamber. ... The dedicated O‑Ring for inoxPRES HT is identifiable by its green color and is made of a special FKM compound developed for this specific application field.
Pressfitting systems for Compressed Air Installations, LABhttps://www.racmet.com/en-ww/pressfitting-systems-for-compressed-air-installations.aspxDepending on the residual oil present in the compressed air lines, it will be necessary to check that the EPDM O-Ring is suitable, or if necessary, replace it with the FKM O-Ring.