With over 35 years of experience, Effox-Flextor-Mader
offers time tested robust dampers to achieve a 20+
year low maintenance design life. Constructed with
carbon steel, stainless steel, alloy, and/or corrosion
resistant materials our dampers are capable of
withstanding temperatures up to 1800°F (982°C) and the most chemically punishing environments.
engineering and design team is involved with every project to ensure the structural and dynamic
integrity of our products.
has installed Butterfly Dampers
from 12 inches (305 mm) in diameter to greater than 144 inches (3658 mm) in diameter. Our
Butterfly Dampers can be found in some of the harshest environments where abrasion,
and dust loading are prevalent
DIVERTER / STACK ISOLATION DAMPERS
experience in the design and supply of toggle and
pivot style Diverter Dampers for HRSG, waste heat
recovery, gas turbine, and other systems that
require diversion of the gas stream. We have
designed and installed diverter dampers in systems
ranging from small engine units to the largest
turbines in the world such as the GE Frame 7 FA &
GUILLOTINE / SLIDE GATE DAMPERS
manufactures heavy-duty low-leak slide gate and
zero-leak Slide Gate Dampers
to provide isolation for flue gas and air systems.
Slide gates, also referred to as
required to isolate systems for maintenance
or for bypass purposes.
EFM has supplied slide gate dampers in the largest
ducting systems in the industry. We have supplied gates with duct openings of 25 feet
wide and 35 feet (10.7 m) tall.
Our zero leak guillotine dampers can be pressure and
temperature tested in our facilities to
verify leakage at system design conditions.
offers several styles of
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
are primarily used for system isolation. EFM parallel blade louvers are used around the
applications for bypass capability and tight shut off for the process & utility industries.
METAL SEAT RTO DAMPERS
manufactures high-performance Metal Seat RTO
for elevated temperature applications in thermal oxidizers and dirty abrasive environments
as pulverizer outlet dampers. Utilizing a sectioned adjustable metal seal and machined blade
seating surface these dampers provide tight shutoff for critical applications.
EFM has extensive experience in the design
and supply of toggle and pivot style diverter
dampers for HRSG, waste heat recovery, gas turbine,
and other systems that require diversion
of the gas stream.
manufactures Poppet Dampers
which are ideal for applications that require quick cycling time and tight shutoff. Poppet
dampers are used for isolation capabilities for fabric filter applications and incineration
systems. They are engineered to control the reverse gas flow, outlet flow, and bypass flow
gases, thereby enhancing filtration.
RADIAL / INLET VANE DAMPERS
Radial Vane Dampers
Radial vane dampers are used primarily on the inlet of centrifugal fans to direct flow and
assist in pre-spinning the flow into the wheel. Radial Vanes are commonly referred to as
Variable Inlet Vanes (VIV).
The use of a radial vane damper enhances the performance of the fan by:
Introducing swirl into the inlet of the fan in the direction of rotation
Changing the fan curve as the damper moves
Eliminating low-volume stalling of the fan