- Legal
- Terms & Conditions (Domestic)
- Terms & Conditions (Export)
  VD - Butterfly Type Volume Control Damper  
  • An economical, effective means to control the air quantity feeding round neck diffusers.
Product Features
  • Coated steel construction
  • The smooth “butterfly” action of two pivoting blades provides continuous adjustment.
  • The blades are conveniently adjusted from the room side of the diffuser, and are designed to hold their position indefinitely.
  • The VD damper can be added to any Anemostat round neck diffuser or SRA square to round adapter.
  • Flex duct bends may interfere with operation of damper and is not recommended.
  • 5/32" hex key required.
  • Field installed accessory
  • Available in aluminum or 304/316 stainless steel
    (operator parts are galvanized steel).


Model Description
VD Butterfly Type Volume Control Damper
VD-C Butterfly Type Volume Control Damper with 24" Cable