Greenheck’s line of industrial dampers has expanded with the addition of Model HBS-430 and HBS-431 blast dampers designed to protect against blasts and instantaneous pressure changes. These heavy-duty, double-flanged, channel frame-style dampers with double thickness fabricated airfoil blades are qualified to pressures as high as 15 psi, covering many applications in Unified Facilities Criteria (UFC) and General Services Administration (GSA) codes and standards including Charge Weight I at 82 ft. Model HBS-430 and HBS-431 blast dampers are ideal for government buildings, mining, oil and gas platforms, refineries, and protection of ventilation systems.