Backflow non-return valve for use in filter arrangement of motor car for protecting air filter from hot exhaust gas, has sleeve fed at guide surface, and another sleeve portion surrounding guide pin and elastic element in radial direction

摘要

The valve (10) has a valve disk (76) comprising a sleeve (68) that encloses a guide pin (72). An elastic element (70) applies working force to the valve disk. The sleeve in a sleeve portion (71) is movably fed at a guide surface (75) of the guide pin. Another sleeve portion (69) surrounds the guide pin and the elastic element in radial direction, where the guide surface and the guide pin are movably connected with each other. The guide pin is fixed in a socket (62) such that the guide surface covers an outside of a close position of the valve disk by one of the sleeve portions. An independent claim is also included for a filter arrangement for a motor car, comprising a filtration chamber.