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fireproofing shutter series- compound steel fireproofing rolling shutter doors |
compound steel fireproofing rolling shutter doors |
| GFJ-F4 compound steel fireproofing rolling shutter is made by double-deck, onetime-compound, cold-bending form new technology. The heat insulation refractory materials are filled in the middle and they reduce the back fire heat radiation, with refractory time long, superior performance, and can save the water curtain protection system and realize the automatic and linkage control with fire services center. The product is tested by national fixed fire extinguishing system and fire retarding component quality supervision and inspection center. The refractory time is more than 3 hours which accord with GB 14102-93 national standards. | |
