Model PRD pressure regulating damper is a single blade, steel, barometric damper with a counter balanced weighted arm. The PRD provides an aconomical solution for bypassing exces air when zone dampers close.
Model PRD pressure regulating damper is a single blade, steel, barometric damper with a counter balanced weighted arm. The PRD provides an aconomical solution for bypassing exces air when zone dampers close. Damper adjustment is done by adjusting the supplied weights and by offsetting the arm. The PRD is reversable for airflow direction. Size CFM 12"x8" PRD 1000 12"x10" PRD 1200 12"12" PRD 1400 20"x8" PRD 1600 20"x10" PRD 2000 20"x12" PRD 3000 *CFM calculated @ .3W.C. For more information go to: http://www.ewccontrols.com/acrobat/090375a0224.pdf