High-pressure sight glass type 520 PN 63/400Intermediate flange design for flanges acc. to DIN EN 1092-1 USAGE High-pressure sight glasses of type 520 are used to observe the flow in pipelines. They enable reliable monitoring of the function and performance of individual devices as well as complete systems. The high-pressure sight glasses of type 520 are designed for installation between flanges according to DIN EN 1092-1. Seals should always be used that fit the sealing surfaces. The screw material should be equivalent or superior in comparison to the flange material. If possible, both the screw thread and the screw head should be provided with a suitable lubricant. 10112025 - Subject to technical changes and errors!

r High-pressure sight glass type 520 PN 63/400 10112025 - Subject to technical changes and errors! 4

r High-pressure sight glass type 520 PN 63/400 Example for Explaining the Code Composition Unless otherwise specified, the highlighted factory standard is delivered. The product code 11-520-5-3-1-1-7-000 corresponds to the standard version: Seal Graphite / stainless steel 10112025 - Subject to technical changes and errors!

r High-pressure sight glass type 520 PN 63/400 OPTIONAL ACCESSORIES Round mica discs > up to 320 °C with Borosilicate glass > for safety applications For aggressive media, steam or operating pressures > 160 barg will use mica discs for the protection of glasses. The pressure-temperature limits apply according to DIN EN 1092-1! Our tool with the same name is available on our website. (www.aci24.com, under Service, sub-item Tools) ^ Konigskamp 19 • 52428 Julich • Germany 10112025 - Subject to technical changes and errors!