A suction valve (100, 200) configured to be attached to a conduit that is arranged to provide a suction force for sucking liquid from a vessel, the suction valve (100, 200) comprising - an outer body (102, 202) comprising a suction inlet and configured to be connected to the conduit, and - an inner body (104, 204) movably arranged within the outer body (102, 202), wherein - the outer body (102, 202) and the inner body (104, 204) are concentrically arranged in relation to each other around a longitudinal axis, - the inner body is arranged to move in the directions (-Y, Y) along the longitudinal axis, - a spring (106, 206) arranged to exert a force on the inner body (104, 204) to press the inner body (104, 204) in a direction (-Y) towards the suction inlet, such that the inner body (104, 204) seals the suction inlet to thereby set the suction valve (100, 200) in a closed state, - the inner body (104, 204) is arranged to move in a direction away from the suction inlet when a suction force applied by the conduit is larger than the force exerted by the spring, to thereby set the suction valve (100, 200) in an open state to allow liquid to be sucked from the vessel, through the suction inlet and into the conduit - the suction inlet of the outer body (102, 202) comprises an end suction inlet and a lateral suction inlet, - the inner body (104, 204) comprises an end sealing surface, a lateral sealing surface and a liquid passage for allowing liquid to flow through the inner body (104, 204), - in the closed state, the inner body (104, 204) is in a first position along the longitudinal axis, in which first position the end sealing surface seals the end suction inlet while the lateral sealing surface seals the lateral suction inlet, - the inner body (104, 204) is arranged to move in a direction away from the end suction inlet when an external force that is applied on the inner body (104, 204), by pressing of the suction valve (100, 200) towards the vessel, is larger than the force exerted by the spring (106, 206), to thereby set the suction valve (100, 200) in an intermediate state to allow liquid to be sucked from the vessel, through the end suction inlet and into the conduit; and characterized in that, - in the intermediate state, the inner body (104, 204) is in a third position along the longitudinal axis, in which third position the end sealing surface is retracted from the end suction inlet and the lateral sealing surface seals the lateral suction inlet. - an outer body (102, 202) comprising a suction inlet and configured to be connected to the conduit, and - an inner body (104, 204) movably arranged within the outer body (102, 202), - the outer body (102, 202) and the inner body (104, 204) are concentrically arranged in relation to each other around a longitudinal axis, - the inner body is arranged to move in the directions (-Y, Y) along the longitudinal axis, - a spring (106, 206) arranged to exert a force on the inner body (104, 204) to press the inner body (104, 204) in a direction (-Y) towards the suction inlet, such that the inner body (104, 204) seals the suction inlet to thereby set the suction valve (100, 200) in a closed state, - the inner body (104, 204) is arranged to move in a direction away from the suction inlet when a suction force applied by the conduit is larger than the force exerted by the spring, to thereby set the suction valve (100, 200) in an open state to allow liquid to be sucked from the vessel, through the suction inlet and into the conduit - the suction inlet of the outer body (102, 202) comprises an end suction inlet and a lateral suction inlet, - the inner body (104, 204) comprises an end sealing surface, a lateral sealing surface and a liquid passage for allowing liquid to flow through the inner body (104, 204), - in the closed state, the inner body (104, 204) is in a first position along the longitudinal axis, in which first position the end sealing surface seals the end suction inlet while the lateral sealing surface seals the lateral suction inlet, - the inner body (104, 204) is arranged to move in a direction away from the end suction inlet when an external force that is applied on the inner body (104, 204), by pressing of the suction valve (100, 200) towards the vessel, is larger than the force exerted by the spring (106, 206), to thereby set the suction valve (100, 200) in an intermediate state to allow liquid to be sucked from the vessel, through the end suction inlet and into the conduit; and characterized in that, - in the intermediate state, the inner body (104, 204) is in a third position along the longitudinal axis, in which third position the end sealing surface is retracted from the end suction inlet and the lateral sealing surface seals the lateral suction inlet.