Pressure Relief Damper.
pressure relief dampers will be provided in each theatre to prevent contamination of air from clean and dirty area. Suitably sized air pressure relief damper will be strategically placed, enabling differential room pressure to be maintained and ensure that when doors are opened between clean and dirty areas. Counter- weight balancing system will be provided in the prd to the prd will remain closed at pressure below the set pressure only fractionally above the threshold pressure. Allied prd has first class electrolyzed steel plate for body and high grade ss304 stainless steel blades, which pivot upon sealed for life time maintenance.