Volume Control & Relief Dampers

Pressure Relief Damper – Heavy Duty

The Holyoake PRD-150 is a heavy duty pressure relief, back draft, or non-return damper. Constructed from extruded aluminium with twin blade seals and side gaskets, it is capable of handling high velocities of turbulent air and provides minimal leakage when closed against reverse flow.

  • Heavy duty robust blades.
  • Vertical or horizontal mounting.
  • Twin blade edge seals.
  • Aluminium blade side seal gaskets.
  • Linked blades to avoid flutter.
  • Gravity operation.
  • Weights can be used to provide adjustable resistance to airflow.
  • High temperature blade seals (225°C) are available as an option.
Revit Files