WEBMar 20, 2024 · PR-11 | AWV. Home. Products. Dampers. PR-11. Pressure Relief, Single Thickness (Vertical or Horizontal Mount) 3900 fpm. Max Face Vel. 8" Damper Depth. 5 in w.g. Max Pressure. 250°F. Max Temp. Available! Find a Rep. Technical Specifications. Blade Type. Single Thickness. Certifications. N/A. Max Face Vel. 3900 fpm. Damper …