Listing ID #241449
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Contact Supplierstrong polyester film laminated and encapsulating a heavy, corrosion resistant steel wire helix, forms the inner core and supports a thick blanket of fiberglass insulation. The outer vapor barrier is a bi-directional, reinforced metallized vapor barrier which will not unravel. The smooth air tight inner core of polyester is designed for low to medium pressure systems.
technical specification:
diameter: 4" through 20" id
length : 25 feet
pressure rating: (wg)
positive: 10 inches (4"-16" id)
    6 inches (18"-20" id)
negative: 1/2 inch (4"-20" id)
velocity: 5000 fpm
temperature range: -20f to 250f
r value: r-4.2, r-6.0, r-8.0