Frequently asked questions
For which air tightness class according to DW 144 is the flange suitable?
TÜV-Nord has confirmed that our premium flange with injected butyl sealing compound meets the requirements of tightness class D according to DW 144 (Specification for Sheet Metal Ductwork/1998).
For which air tightness class according to EN 1507:2006 / EN 16798:3 is the profile suitable?
Our Premium flange with injected butyl sealing compound is suitable for tightness class D according to DIN EN 1507:2006 (TÜV-Nord certified) or ATC 2 according to DIN EN 16798:3.
Is the flange applicable in accordance with ISO 846?
Yes, the sealant fulfils the requirements according to ISO 846 - A, C. The sealing compound is classified as very well disinfectable and fulfils the hygienic requirements for use in RLT systems according to VDI 6022, Sheet 1, Section 3.5.
Is the injected butyl sealant suitable for powder coating?
Yes, the Gebhardt-Butyl sealant injected into our "Premium" flange is suitable for powder coating.