Needlefree valve device (1) for controlling the flow of fluid in a pathway, the device (1) being operable in a closed and in an open configuration and comprising a first component (3), a second component (9), a locking means configured to selectively engage the first component (3) with the second component (9) in the open configuration when the first component (3) is displaced in an opening direction (23) along a valve axis toward the second component (9) or in the closed configuration when the first component (3) is displaced against the opening direction (23) away from the second component (9), and a sealing component (15) having a first resilient portion (19) and a second resilient portion (16), the first resilient portion (19) comprising at least one slit (26) and contacting the first component (9) to provide a seal in the closed configuration, wherein the first resilient portion (19) is adapted to move, buckle or flex to enable fluid flow through the at least one slit (26) upon application of a mechanical force of the first component (3) on the first resilient portion (19) in the opening direction (23) to assume the open configuration, and wherein the second resilient portion (16) is adapted to apply a counterforce to return the valve device (1) to the closed configuration when the mechanical force is no longer applied.
