BELÜFTUNGSVENTIL FÜR EIN GEKÜHLTES FACH

摘要

A vaccum-breaking valve comprising: a tubular body ( 10 ) mounted through one of the walls (P) of the cabinet (G) and having inner ( 11 ) and outer ( 12 ) ends, a valve seat ( 15 ) defining a fluid communication between the inside and the outside of cabinet (G); and a seal constantly biased towards a closed position, blocking said fluid communication and dispalceable towards an open valve position. The seal comprises a slide ( 20 ), which is axially and slicingly mounted through the valve seat ( 15 ) and has a surrounding sealing ring ( 25 ), which is seated against the valve seat ( 15 ) when the slide ( 20 ) is displaced to the closed seal position, the slide ( 20 ) being provided with at least one air passage ( 24 ) interconnecting the upstream and downstream sides of the valve seat ( 15 ) when the slide ( 20 ) is in the open seal position.