ECD (Blade Seals)

Aero-foil Blade Damper

  • Manually or Electrically Operated
  • Tip Seals on Aluminium Aerofoil Blades
  • Minimum Size 100mm x 150mm
  • Maximum Size 2000mm x 1950mm
  • Standard Depth of 180mm
  • Extended Shaft Option
  • 30mm Flanges
  • Horizontal or Vertical Installation
  • Opposed Blade Movement

Technical Specifications


Electrovent Control Dampers (ECD) are airflow control products used in HVAC installations.

ECD can be used to control intake and exhaust flows, and for air balancing applications.

ECD is also used on air handling units. Aerofoil blades tip seals provide finer control and tighter shut off than flat blade dampers.


The ECD frame is manufactured from galvanised steel as standard, blades are double skin aerofoil aluminium extrusions. Blades are fitted with tip seals to seal blade edges in the closed position.

Blades are installed in the casing with low friction nylon bushes. Nylon gears provide opposed blade operation and gears are driven on a 13mm hex shaft. Blades position is indicated from outside of the casing.


The ECD can be supplied with:

• Locking quadrant for manual operation

• Extended shaft for actautor by others

• Electrical actuator motorising the control damper for automated control.

Various actuator options are available depending on the control required.

Where external space is a constraint, the actuator can be mounted internally within the airstream.

The ECD is suitable for vertical and horizontal installation in walls and slabs.

Spigots can be fitted for spiral duct installation.

Casing available in 304 and 316 stainless steel on request.

Parallel blade movement is available on request (opposed blade movement as standard).


Minimum size 100mm (w) x 150mm (h).

Maximum size in single section 2000mm (w) x 1950mm (h).

Sizes exceeding maximum are combined in sections.

Casing depth is 180mm as standard or to client specification.

Flange size is 30mm as standard or to client specification.

Leading Manufacturer of Airtight Doors, Fire, Smoke, Control and Non Return Dampers

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