Chinese wholesale Smoke Fire Seal - Fire viewer – Gallford

When temperature goes up to 180℃ in fire, the intumescent core inside of door viewer will rapidly expand to filling the interspace to stop fire, smoke or gas through out.

• Material：Available in either brass or chrome finish

• Visual angle：100-130 degree

• Diameter：25mm

• FV25-1 suitable for 40-60mm thickness of fire door                                                                                                          FV25-2 suitable for 60-80mm thickness of fire door                                                                                                          FV25-3 suitable for 80-100mm thickness of fire door

• Back cover available