Vos experts en sécurité: formations en-ligne TMD & SGH. Optenez votre certificat en Transport des marchandises dangereuses et du système général harmonisé! Since 2001, all Korfmann fans and silencers have been manufactured exclusively by CFT. This means that CFT and Korfmann can look back on a successful cooperation over many years. Since 2001, nearly 6,000 Korfmann fans have been successfully designed and delivered for mining and tunnelling applications worldwide.