VACUUM DEVICE FOR A PNEUMATIC BRAKE BOOSTER

The invention relates to a vacuum device for a pneumatic brake force amplifier, which is arranged between the brake force amplifier and a vacuum source and contains at least one vacuum line with at least one check valve (1), wherein the check valve (1) comprises a tubular housing part (2) with a source-side (3) and an amplifier-side connection stub part (4), wherein at least one valve element (5) and a strainer (6) are arranged in the source-side connection stub part (3). The invention is characterized in that the valve element (5) contains a valve cup part (10) which is arranged in a form-locking manner in the source-side connection stub part (3), wherein the inner cup bottom (11) is designed as a valve seat (7) with at least one passage opening (12) and on the outer cup bottom (15) the strainer (6) is arranged to cover the passage opening (12), wherein at the inner cup bottom (11) the passage opening (12) can be closed by the pressure spring-loaded valve disk (8), wherein the pressure spring (9) towards the source-side connection stub part (3) is supported on a closure element (14) provided with at least one through bore (13), which is fixed in the source-side connection stub part (3).