A damper valve comprising - a controlled flow channel arranged to provide a fluid connection between a valve inlet side (100.1) and a valve outlet side (100.2) of the damper valve; - a controlled valve provided in the controlled flow channel such as, in operation, to allow influencing a controlled fluid flow (Fd) in the controlled flow channel in a controlled flow direction (Fd) from the valve inlet side to the valve outlet side; - a movable valve body acting on the controlled valve, the movable valve body being movable with respect to a wall of the controlled flow channel so as to change a closing force of the controlled valve; and - a control chamber comprising - - a control chamber inlet provided in the movable valve body and in fluid connection with the valve inlet side (100.1) upstream of the controlled valve with reference to the controlled flow direction (Fd), the control chamber inlet comprising a flow restriction (160.1)for a control fluid flow from the valve inlet side to the control chamber; - - a configuration providing a variable volume of the control chamber, a change in volume of the control chamber acting so as to cause a movement of the movable valve body, an increase of a fluid pressure in the control chamber acting to increase the volume of the control chamber so as to move the movable valve body, thereby increasing a closing force of the controlled valve; and - - a pressure relief valve provided in the control chamber inlet, and configured and arranged to allow a relief fluid flow (Fr) from the control chamber to the valve inlet side (100.1) bypassing the flow restriction (160.1) of the control chamber inlet, wherein the movable valve body comprises first and second valve body parts (121, 122) that hold the pressure relief valve there between and provide a valve seat (122.3) for the pressure relief valve, against which valve seat the pressure relief valve closes, and the control chamber inlet is provided at least partly in between the first and second valve body parts (121, 122), optionally the pressure relief valve being configured as a one-way valve. - a controlled flow channel arranged to provide a fluid connection between a valve inlet side (100.1) and a valve outlet side (100.2) of the damper valve; - a controlled valve provided in the controlled flow channel such as, in operation, to allow influencing a controlled fluid flow (Fd) in the controlled flow channel in a controlled flow direction (Fd) from the valve inlet side to the valve outlet side; - a movable valve body acting on the controlled valve, the movable valve body being movable with respect to a wall of the controlled flow channel so as to change a closing force of the controlled valve; and - a control chamber comprising - - a control chamber inlet provided in the movable valve body and in fluid connection with the valve inlet side (100.1) upstream of the controlled valve with reference to the controlled flow direction (Fd), the control chamber inlet comprising a flow restriction (160.1)for a control fluid flow from the valve inlet side to the control chamber; - - a configuration providing a variable volume of the control chamber, a change in volume of the control chamber acting so as to cause a movement of the movable valve body, an increase of a fluid pressure in the control chamber acting to increase the volume of the control chamber so as to move the movable valve body, thereby increasing a closing force of the controlled valve; and - - a pressure relief valve provided in the control chamber inlet, and configured and arranged to allow a relief fluid flow (Fr) from the control chamber to the valve inlet side (100.1) bypassing the flow restriction (160.1) of the control chamber inlet, wherein the movable valve body comprises first and second valve body parts (121, 122) that hold the pressure relief valve there between and provide a valve seat (122.3) for the pressure relief valve, against which valve seat the pressure relief valve closes, and the control chamber inlet is provided at least partly in between the first and second valve body parts (121, 122), optionally the pressure relief valve being configured as a one-way valve. - - a control chamber inlet provided in the movable valve body and in fluid connection with the valve inlet side (100.1) upstream of the controlled valve with reference to the controlled flow direction (Fd), the control chamber inlet comprising a flow restriction (160.1)for a control fluid flow from the valve inlet side to the control chamber; - - a configuration providing a variable volume of the control chamber, a change in volume of the control chamber acting so as to cause a movement of the movable valve body, an increase of a fluid pressure in the control chamber acting to increase the volume of the control chamber so as to move the movable valve body, thereby increasing a closing force of the controlled valve; and - - a pressure relief valve provided in the control chamber inlet, and configured and arranged to allow a relief fluid flow (Fr) from the control chamber to the valve inlet side (100.1) bypassing the flow restriction (160.1) of the control chamber inlet,