Sightglass acc. DIN 28120 Standard Design Materiais: 1.4571, 1.4404 (welding flange) 1.4541 (cover flange) With studs (A2-70) and nuts (A2) Gaskets: Klingersil (C-4400) With Borosilicatglass-pane acc. DIN 7080 Pressure rating: 1 Obar/16bar PDF Downloading