Opposed Blade Dampers


Air/Shield Features and Design Guide
Opposed blade dampers suitable for systems requiring air control (Aerofoil) and low closed blade leakage (Aeroseal).

Suitable for low/medium pressure and velocity systems.

Available in flanged type casing up to 1000mm square or spigotted type casings up to 1000mm square / 1000mm diameter or flat oval up to 1000mm x 500mm in a single drive arrangement.

ES35 and ES36 Features and Design Guide
Opposed Blade (standard) or Parallel Blade (optional) dampers suitable for systems requiring air control (ES35) and low closed blade leakage (ES36).

Suitable for low / medium pressure and velocity systems.

Available in flanged type casing (up to 2080mm x 1000mm in a single drive arrangement.

  
 

Actionair Air/Shield (Incorporating Energy/Shield ES35 & ES36)
Control and Shut Off Dampers


The Air/Shield range of quality engineered dampers are suitable for air conditioning and ventilation systems requiring air control and low closed blade leakage characteristics, for standard low/medium pressure and velocity systems.
These aerodynamic precise movement opposed blade dampers can be either factory fitted with manual, electric or pneumatic controls and can be supplied in a flanged or spigotted casing.

Application
Air/Shield Dampers to maximum width and height dimensions can be used where the operating total system pressure is up to 1000 Pascals and duct velocities to 12m/second.
Actionair Air/Shield Dampers are designed for applications in normal dry filtered air systems. When required for modulating function, or if exposed to fresh air intakes and/or inclement conditions, the dampers should be subject to a planned inspection programme.
Any application involving corrosive and/or aggressive hostile environmental conditions (e.g. swimming pools) may invalidate our warranty and should be referred to Actionair Sales Office.
 

Size Variations
Catalogue
Flanged
Air/Shield Aerofoil and Aeroseal
FLA (single drive arrangement) / Widths from 100mm minimum– 1000mm maximum, (in 1mm increments). Heights from 100mm minimum – 1000mm maximum, (in 50mm increments).

Spigoted
Air/Shield Aerofoil and Aeroseal / SPG (single drive arrangement )
Widths from 100mm minimum - 1000mm maximum, (in 1mm increments). Heights from 100mm minimum – 1000mm maximum, (in 1mm increments). Air/Shield Aerofoil.

Circular
Series Airtight - Stainless Steel
Air/Shield Aerofoil and Aeroseal (single drive arrangement)
Diameters from 100mm minimum – 1000mm maximum (in 1mm increments).

Air/Shield Aerofoil and Aeroseal / Flat Oval (single drive arrangement)
Widths from 300mm minimum – 1000mm maximum, (in 1mm increments). Heights from 100mm minimum–500mm maximum, (in 1mm increments).

Energy/Shield ES35 and ES36 FLA (single drive arrangement)
Widths from 200mm minimum – 2080mm maximum, (in 1mm increments). Heights from 200mm minimum–1000mm maximum, (in 1mm increments).
 

 


 

 

Series Aerofoil

Series Aerofoil Series Aerofoil for system air balancing having aerodynamic ribbed double skin type 1.4016 (430) Ferritic Stainless Steel 50mm wide x 0.4mm thick blades. Housed within a galvanised mild steel flanged or galvanised spigotted casing being suitable for systems with a temperature range of –20 °C through to +70 °C.
Optional Blade construction type 1.4401 (316) Austenitic Stainless Steel.

Series Aeroseal


Series Aeroseal for system air balancing and shut-off having aerodynamic double skin type 1.4016 (430) Ferritic Stainless Steel 50mm wide x 0.4mm thick blades with synthetic trailing edge blade seals and Stainless Steel side seals. Housed within a galvanised mild steel flanged or galvanised spigotted casing being suitable for systems with a temperature range of 0 °C through to +70 °C.
Optional Blade construction type 1.4401 (316) Austenitic Stainless Steel.

For more information including dimensional data please view the 12 page Air/Shield Catalogue


Specification for AIR / SHIELD DAMPERS

The casing shall be either galvanised frame with peripheral flanges prepunched with elongated corner hole fixing to suit proprietary duct flanges (type FLA) or double skin spigot casing with square, rectangular, circular of flat oval connections (type SPG). Complying to the requirements of DW 144 Classes A, B and C. Air balancing dampers (vcd) shall have low profile aspect ratio aerofoil stainless steel opposed blades with positive cap and bar drive mechanism totally enclosed and out of the air stream. Control dampers shall have low profile aspect ratio aeroseal stainless steel opposed blades with silicone treated, synthetic blade seal and spring stainless steel peripheral gasketing to minimise air leakage in the fully closed position with the air flow in either direction. The blades are driven through 90 degrees with the gearbox and positive cap and bar drive mechanism totally enclosed and out of the air stream. Control dampers shall be suitable for systems having a maximum differential pressure of 1000 Pa and shall have a maximum closed blade leakage of 25 l/sec/m² at this pressure. All manually operated balancing dampers shall have positional indicators and locking devices. Motorised dampers, where required, the motors shall be factory fitted and tested with a simple push fit direct to the damper drive without the use of couplings or linkage and selected to give the required.

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