EFM LOUVER DAMPERS

Effox-Flextor-Mader (EFM) offers several styles of Louver Dampers to meet your application and system specifications.

Our Louver Dampers are offered with a parallel blade or opposed blade design. Parallel louvers are primarily used for system isolation. EFM parallel blade louvers are used around the world in applications for bypass capability and tight shut off for the process & utility industries.

LOUVER DAMPERS

The EFM opposed blade louver offers the ability to accurately modulate and control flow over a design range. The opposed blade design helps to create a more uniform flow across the damper.

LOUVER DESIGN FEATURES

Bolted dual airfoil design to minimize deflection and warping of blades
Electric, pneumatic, hydraulic, or manual actuation
Outboard bearings to prevent flue gas exposure and allow for ambient cooling.
Bearings are permanently sealed and lubricated to eliminate maintenance
Bolted packing gland assembly at damper shafts for ease of maintenance
Blade to blade, top & bottom, and jamb seals are available to minimize leakage to less than 1% of flow volume

DOUBLE LOUVERS

Two banks of blades. The area between the banks of blades is pressurized with seal air to achieve zero leakage
Options for in-sync actuation or independent actuation of banks of blades when control is needed
“Belt and Suspenders” approach

TANDEM LOUVERS

One bank of blades with open space in- between blade assemblies. When in the closed position the open space between the blades is pressurized to achieve zero leakage
Offers a lower cost alternative and smaller footprint to the double louver

ZERO-LEAK DESIGN

Along with our standard dual bolted airfoil design, EFM offers two damper models with a zero-leakage design.

EFM LOUVER DAMPERS

LOUVER DAMPERS

LOUVER DESIGN FEATURES

DOUBLE LOUVERS

TANDEM LOUVERS

ZERO-LEAK DESIGN

GET IN TOUCH OR REQUEST A QUOTE

EFFOX

Flextor

Mader

DAMPERS

Support

Expansion Joints