Dispensing device comprising: a coupling body arranged at a dispensing end of the dispensing device, said coupling body being essentially rotational symmetrical around a central axis, an inner flow sleeve concentric with said central axis and arranged radially inside of the coupling body, a release sleeve concentric with said central axis and arranged radially outside of the coupling body, a poppet valve comprising a poppet valve stem (16, 16') and a poppet valve disc (17, 17'), and wherein a first essentially axial end surface of the inner flow sleeve is adapted to serve as a valve seat for the poppet valve disc (17, 17'), at least one locking element arranged in a radial opening of the coupling body and in contact with a radial inner surface of the release sleeve, a retaining collar which is axially movable between at least a first and a second position in relation to the coupling body as well as axially movable in relation to the inner flow sleeve and guided on a radial outer surface of the inner flow sleeve, the retaining collar adapted to retain the locking element when in the first position and to allow movement of the locking element in the radial direction of the coupling body when in the second position, means for allowing axial movement of the release sleeve in relation to the coupling body in a direction towards the dispensing end of the dispensing device when the retaining collar is in the second position, wherein the poppet valve stem (16, 16') is attached to the coupling body and the dispensing device further comprises means for allowing axial movement of the inner flow sleeve in relation to the coupling body in a direction away from the dispensing end of the dispensing device when the retaining collar is in the second position, and wherein said means for allowing axial movement of the inner flow sleeve in relation to the coupling body in a direction away from the dispensing end of the dispensing device comprises at least a connecting element or a link arm, said connecting element or link arm attached to the inner flow sleeve and extending through a radial slot of the coupling body. a coupling body arranged at a dispensing end of the dispensing device, said coupling body being essentially rotational symmetrical around a central axis, an inner flow sleeve concentric with said central axis and arranged radially inside of the coupling body, a release sleeve concentric with said central axis and arranged radially outside of the coupling body, a poppet valve comprising a poppet valve stem (16, 16') and a poppet valve disc (17, 17'), and wherein a first essentially axial end surface of the inner flow sleeve is adapted to serve as a valve seat for the poppet valve disc (17, 17'), at least one locking element arranged in a radial opening of the coupling body and in contact with a radial inner surface of the release sleeve, a retaining collar which is axially movable between at least a first and a second position in relation to the coupling body as well as axially movable in relation to the inner flow sleeve and guided on a radial outer surface of the inner flow sleeve, the retaining collar adapted to retain the locking element when in the first position and to allow movement of the locking element in the radial direction of the coupling body when in the second position, means for allowing axial movement of the release sleeve in relation to the coupling body in a direction towards the dispensing end of the dispensing device when the retaining collar is in the second position, wherein the poppet valve stem (16, 16') is attached to the coupling body and the dispensing device further comprises means for allowing axial movement of the inner flow sleeve in relation to the coupling body in a direction away from the dispensing end of the dispensing device when the retaining collar is in the second position, and wherein said means for allowing axial movement of the inner flow sleeve in relation to the coupling body in a direction away from the dispensing end of the dispensing device comprises at least a connecting element or a link arm, said connecting element or link arm attached to the inner flow sleeve and extending through a radial slot of the coupling body.