F 63 N In-line pressure and vacuum relief valveIn line armatures, In line pressure and vacuum relief valves / By Elke Nienstedt KITO® VD/Sc2-… As inline armature with venting and breathing valve function for tanks and for installation in pipe, for example also for connection to an air drying apparatus. Same function as KITO® VD/TG-…, see type sheet F 31 N. Download