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. Our engineering and design team is involved with every project to ensure the structural and dynamic integrity of our products.
BUTTERFLY DAMPERS Effox-Flextor-Mader (EFM) 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, corrosion and dust loading are prevalent
Learn More DIVERTER / STACK ISOLATION DAMPERS Effox-Flextor-Mader (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. 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 & 9 FA.
Learn More GUILLOTINE / SLIDE GATE DAMPERS Effox-Flextor-Mader (EFM) 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
Guillotine Dampers , are 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 (7.6 m) 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.
Learn More LOUVER DAMPERS Effox-Flextor-Mader (EFM) offers several styles of
Louver Dampers 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.
Learn More METAL SEAT RTO DAMPERS Effox-Flextor-Mader (EFM) manufactures high-performance Metal Seat RTO Dampers for elevated temperature applications in thermal oxidizers and dirty abrasive environments such as pulverizer outlet dampers. Utilizing a sectioned adjustable metal seal and machined blade seating surface these dampers provide tight shutoff for critical applications.
Learn More DIVERTER DAMPERS 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.
Learn More POPPET DAMPERS Effox-Flextor-Mader (EFM) 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 of gases, thereby enhancing filtration.
Learn More RADIAL / INLET VANE DAMPERS Radial Vane Dampers from
Effox-Flextor-Mader (EFM) 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
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