A coupling device for transferring a fluid, comprising a first housing extending along a principal axis, the first housing comprising a first opening at a back end portion thereof, a second opening at a front end portion thereof, and a tube portion extending from the first opening into the first housing, a second housing displaceably arranged within the first housing along the principal axis between a first position at the front end portion of the first housing and a second position at the back end portion of the first housing, the second housing comprising a first sealing element, and a third housing releasably connectable to the second housing and configured for displaceable arrangement within the first housing along the principal axis, the third housing comprising a channel through the third housing, and a second sealing element arranged to seal the channel, and at least one control element arranged in at least one of the first housing and the third housing, wherein a first control element of the at least one control element comprises a spring element extending along the principal axis, A, and a head portion arranged at an end of the spring element, wherein the head portion comprises a surface facing the second sealing element, and wherein the at least one control element is configured to conditionally seal at least one of the first sealing element and the second sealing element from a fluid in case the second housing and the third housing are disconnected, whereby, in the first position of the second housing, the third housing is insertable into the first housing via the second opening thereof, and insertable between the first housing and the first sealing element, such that the first and second sealing elements are configured to abut each other and sealingly separate the tube portion and the channel, and the surface of the head portion of first control element and the second sealing element are configured to sealingly abut each other, and whereby, in the second position of the second housing, the third housing and the second housing are connected and the tube portion projects through the first and second sealing elements and separates the surface of the head portion of the first control element and the second sealing element upon compression of the spring element for connection with the channel for enabling a transfer of fluid through the coupling device. a first housing extending along a principal axis, the first housing comprising a first opening at a back end portion thereof, a second opening at a front end portion thereof, and a tube portion extending from the first opening into the first housing, a second housing displaceably arranged within the first housing along the principal axis between a first position at the front end portion of the first housing and a second position at the back end portion of the first housing, the second housing comprising a first sealing element, and a third housing releasably connectable to the second housing and configured for displaceable arrangement within the first housing along the principal axis, the third housing comprising a channel through the third housing, and a second sealing element arranged to seal the channel, and at least one control element arranged in at least one of the first housing and the third housing, wherein a first control element of the at least one control element comprises a spring element extending along the principal axis, A, and a head portion arranged at an end of the spring element, wherein the head portion comprises a surface facing the second sealing element, and wherein the at least one control element is configured to conditionally seal at least one of the first sealing element and the second sealing element from a fluid in case the second housing and the third housing are disconnected, whereby, in the first position of the second housing, the third housing is insertable into the first housing via the second opening thereof, and insertable between the first housing and the first sealing element, such that the first and second sealing elements are configured to abut each other and sealingly separate the tube portion and the channel, and the surface of the head portion of first control element and the second sealing element are configured to sealingly abut each other, and whereby, in the second position of the second housing, the third housing and the second housing are connected and the tube portion projects through the first and second sealing elements and separates the surface of the head portion of the first control element and the second sealing element upon compression of the spring element for connection with the channel for enabling a transfer of fluid through the coupling device.