1. The document describes the MEZ-SYPHON-FLANGE system for ductwork which complies with DIN 24194/part 1 standards. 2. It includes a syphon flange with an injected sealing compound to create a tight seal, and corners for attaching to duct walls with sealing on the inside or front. 3. Technical specifications and part numbers are provided for galvanized steel and stainless steel syphon flanges and corners of various designs.