The present invention re-lates to a connector device to connect a first aad a second fluid container, directly or indirectly. The connector device exhibit a first and a second connection means, a pierceable barrier member, a piercing member, a fluid transfer channel and a pressure normalization channel. The pres¬sure nonnalization channel is arranged to normalize an increasmg pressure inside second fluid contamer. A valve anange-menl permitting fluid to flow in a first and a second direction is arrangcd in the prcs-sure normalization channel. The valve ar-rangement exhibit a cracking pressure in at least the first direction. The present inven-tion provides for n connector device which reduces the risk of clogging the barrier fil-ter.
