- As end-of-line armature, preferably for non-flammable liquids stored under inert gas, for venting and breathing of fixed roof tanks and above-ground tanks, with lateral connection for the inert gas conduit.
- The upper valve arrangement, which consists of a pressure valve, prevents the development of inadmissible pressure.
- The lower valve serves to automatically control the supply of inert gas (e. g. nitro-gen) and adjusts the necessary inert gas pressure in the tank.
- For the max. admission pressure see setting „vacuum“.