A highly flexible duct made of a fine wire reinforced textile glass fabric that is chemically treated and coated. Ideal for higher temperature fume recovery. Service Temperature Range: -200°F (-129°C) to +1000°F (+538°C) - intermittent Note: A negative pressure fan system with ambient air inlet is recommended to maximize effectiveness and life of duct. It is important to size the duct diameter according to the exhaust output. Air velocity should be less that 50 m/sec. Specifications Material: Alumina coated, textile glass fabric reinforced with a fine V4A wire Construction: Mechanical bond, galvanized steel helix Features: Scuff & flame resistant Compression Ratio: 4:1 Temperature Range: -200°F to +1000°F (Intermittent) Color: Metallic gray Duct Chart Sku Size Working Pressure Neg. Pressure Weight NF3UL100003X25 3 in. 6.8 PSI 4.5 in. HG .56 lbs/ft NF3UL100004X25 4 in. 3.7 PSI 2.1 in. HG .74 lbs/ft NF3UL100005X25 5 in. 3 PSI 1.6 in. HG .84 lbs/ft NF3UL100006X25 6 in. 2.3 PSI 1.2 in. HG .9 lbs/ft NF3UL100008X25 8 in. 1.4 PSI .7 in. HG 1.1 lbs/ft NF3UL100010X25 10 in. 1 PSI .45 in. HG 1.5 lbs/ft NF3UL100012X25 12 in. .75 PSI .3 in. HG 1.7 lbs/ft
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