Volume Control

Airfoil Control Damper

The Holyoake HCD-75 is a precision made volume and pressure control device, with extremely low leakage when closed. Similar in design to the HCD-150, the HCD-75 provides better control of an air stream due to the smaller blade profile.

  • Extremely low leakage.
  • Low resistance when open.
  • Available in either opposed or parallel blade rotation configurations.
  • Available for smoke applications coded as HCD-75-ET.