Profile: Nordfab Systems, Inc. is a supplier of clamp-together duct systems. We produce adapters, adjustable nipples, angle flange, automatic blast gates, ball joint, beam clamps, bleed-in valve, butterfly valve and dampers. Our Quick Fit adapter is available in galvanized, aluminum and stainless materials. We also provide viewing spool, vibration isolator, suction hoods and pipe bracing.