The fire resistance time of Class B steel fire door shall not be less than 1.0 hour, and the hardware fittings used on the fire door must also be fire-resistant hardware fittings. The steel fire door only needs to be pushed open by hand, and then it will be closed quietly and automatically, without the noise of knocking like opening the door inside and outside, and then create a quiet environment.

ZHTdoors branddøre, 31 års produktionserfaring indenfor branddøre og vinduer. De vigtigste UL branddøre, EN branddøre, BS EN branddøre osv. Vi har certificering. ZHTdøre understøtter OEM og gratis design. Vores fordele: god kvalitet, fabrikspris, god service. Velkommen til at konsultere os.