Abstract: A check valve (10) for reception in a fluid passage (5) comprises a valve seat element (1), a valve body (2), and a sleeve (3) wherein the valve body (2) is moveable in such a manner in the sleeve (3), that it rests in a first position on the valve seat element (1) and it is arranged a distance with respect to the valve seat element (1) in a second position. The valve seat element (1) contains an opening (11) which can be closed by the valve body (2) in the first position. A spring element (4) is arranged between the valve body (2) and the sleeve (3). The spring element comprises a first end (41) and a second end (42), wherein the valve body (2) is retained by the spring element (4) in the first position as long as the fluid pressure present in the opening (11) is smaller than the closing force of the spring element,(4), wherein the first end (41) of the spring element (4) is connected to the valve body (2).

Abstract: A check valve (10) for reception in a fluid passage (5) comprises a valve seat element (1), a valve body (2), and a sleeve (3) wherein the valve body (2) is moveable in such a manner in the sleeve (3), that it rests in a first position on the valve seat element (1) and it is arranged a distance with respect to the valve seat element (1) in a second position. The valve seat element (1) contains an opening (11) which can be closed by the valve body (2) in the first position. A spring element (4) is arranged between the valve body (2) and the sleeve (3). The spring element comprises a first end (41) and a second end (42), wherein the valve body (2) is retained by the spring element (4) in the first position as long as the fluid pressure present in the opening (11) is smaller than the closing force of the spring element,(4), wherein the first end (41) of the spring element (4) is connected to the valve body (2).