Normally open fire doors are open at ordinary times and automatically close through various sensors in case of fire. The utility model solves the inconvenience caused by the closing of the fire door at ordinary times and the artificial damage caused by the frequent opening and closing of the fire door.

Mga pultahan sa sunog sa ZHTdoors, 31 ka tuig nga kasinatian sa produksiyon sa mga pultahan sa sunog ug Windows. Ang nag-unang UL fire doors, EN fire doors, BS EN fire doors, etc.,.We have certification.ZHTdoors support OEM and free design.Our advantages:good quality, factory price, good service.Welcome to consult us.