The steel fireproof door has excellent sealing performance. It is tightly closed, and will not leave a crack in the door to make the cold air overflow. As long as the steel fire door is pushed open by hand, it will automatically close quietly, and will not produce a collision sound like the internal and external door opening, thus creating a quiet environment.

ZHTdoors branddeuren, 31 jaar productie-ervaring in branddeuren en ramen. De belangrijkste UL-branddeuren, EN-branddeuren, BS EN-branddeuren, enz. We hebben certificering. ZHTdoors ondersteunen OEM en gratis ontwerp. Onze voordelen: goede kwaliteit, fabrieksprijs, goede service. Welkom om ons te raadplegen.