Downloads and Certificates Our catalogs are currently under revision, so here you can still find the old versions. GFD CatalogueDownload as PDF General Sales ConditionsDownload as PDF General Terms and Conditions of PurchaseDownload as PDF Storage Recommendation PTFE / PE / Elastomer partsDownload as PDF ISO 9001:2015 CertificateDownload as PDF AEO Certificate - Authorized Economic OperatorDownload as PDF REACH InfoDownload as PDF Technical Instructions on Air Quality Control (TA-Luft), Proof of a specific leak test on GFD axial sealDownload as PDF Technical questionareDownload as PDF