Systemtrenner

摘要

The invention relates to a system disconnector (10) which is composed of two backflow preventers (16,18), connected one behind the other in the throughflow direction of the medium, and of a discharge valve (22) which vents the intermediate chamber (20), between the two backflow preventers, into the atmosphere. Said system disconnector is provided with a differential-pressure stabiliser (40) which controls the differential pressure between inlet side (12) and intermediate chamber (20) at an approximately constant value.