Abstract: An arrangement of a valve in a bore of a duct housing includes the duct housing comprising the bore with a stepped design. A valve housing with a stepped outer diameter comprises an inlet and at least one outlet, and is plugged into the bore of the duct housing. A translational valve rod is arranged in the valve housing. At least one valve-closure member is arranged on the translational valve rod. The at least one valve-closure member corresponds with at least one valve seat. A bore diameter of the bore decreases when viewed from a plug-in direction of the valve housing. The stepped outer diameter forms an interference fit with the bore diameter in regions radially surrounding the at least one valve seat. Other regions of the stepped outer diameter have an outer diameter which is smaller than the respective radially surrounding bore diameter.