Displacement control arrangement comprising a control ring, a rear face of a pump unit (2a-2d) and a pressure control device, wherein the pressure control device is shaped as a disc and has a first and a second axial surfaces (11, 12), wherein the first and second axial surfaces (11, 12) are arranged facing essentially opposite directions, and wherein a first axial surface of the pressure control device is fixedly arranged to an axial surface of the rear face of a pump unit (2a-2d), and a second axial surface of the pressure control device is facing an axial surface of the control ring, such that the pressure control device is arranged between the rear face of a pump unit (2a-2d) and the control ring, and wherein the control ring is provided with at least a first and a second opening (35, 36) on the axial surface of the control ring, which first and second openings (35, 36) are formed as semi-circular arcs and are separated by a first and a second land (33, 34), characterized in that the rear face of a pump unit (2a-2d) and the pressure control device are rotational symmetrically arranged about a first rotational axis and the control ring is rotational symmetrically arranged about a second rotational axis, wherein the second rotational axis is radially offset by a distance E in relation to the first rotational axis, and is arranged in parallel to the first rotational axis, and wherein - during operation of the displacement control arrangement the pressure control device and the rear face of a pump unit (2a-ad) are configured to rotate about the first rotational axis, and wherein - the control ring is configured to be moveable around the second rotational axis in order to control the displacement of the displacement control arrangement, and thereby also change the position of the first and second land (33, 34), and wherein the pressure control device (10, 10b, 10c) is provided with a plurality of rotation symmetrically arranged through holes (13, 13b, 13c), wherein each respective through hole (13, 13b, 13c) has an extension in radial direction and an extension in an intended rotational direction, and wherein each respective through hole (13, 13b, 13c) is provided with an inner section, a midsection and an outer section in radial direction of the pressure control device (10, 10b, 10c), and wherein the midsection has a radial extension essentially equal to the radial extension of the first and second openings (35, 36), and wherein the midsection of the through hole has a smaller extension in the intended rotational direction than the outer section and the inner section of the through hole (13, 13b, 13c), wherein, during operation of the displacement arrangement, by adjusting the displacement of the control ring the angular distance the through holes of the pressure control device passes over the first and second land (33, 34) and are fully covered by the first and second land (33, 34) can be controlled. - during operation of the displacement control arrangement the pressure control device and the rear face of a pump unit (2a-ad) are configured to rotate about the first rotational axis, and wherein - the control ring is configured to be moveable around the second rotational axis in order to control the displacement of the displacement control arrangement, and thereby also change the position of the first and second land (33, 34), and wherein