Fire viewer
Product Description
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
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