Dynamic Fire and Fire/Smoke Dampers come in large sizes.

November 19, 2015

Non-actuated, 1.5 hr dynamically rated fire damper, Model DFDAF-310, is available in widths up to 144 in. and heights to 100 in. Electronically actuated, 1.5 hr fire resistance-rated airfoil blade combination fire-smoke dampers include Models FSD-311 and FSD-312, which also come in widths up to 144 in. and heights up to 100 in. Read More

Safety & Security Equipment, HVAC

Vent Guard stops toxic plumbing stack sewer gas migration.

October 12, 2015

Available to fit 2, 3, and 4 in. diameter commercial building plumbing vent stacks and restaurant grease interceptor vents, SureSeal® Vent-Guard eliminates toxic sewer gas and odor egress and migration to nearby rooftop HVAC system air intakes. Maintenance-free product is constructed of EPDM rubber that withstands temperatures from -50 to 150°F. Design uses non-mechanical hinged flapper that allows airflow in while eliminating infiltration of insects, animals, and inclement weather. Read More


Industrial Blast Dampers protect against pressure changes.

October 9, 2015

Qualified to pressures as high as 15 psi, Models HBS-430 and HBS-431 protect against blasts and instantaneous pressure changes. These heavy-duty, double-flanged, channel frame-style dampers feature double thickness fabricated airfoil blades and cover applications in UFC and GSA codes and standards, including Charge Weight I at 82 ft. Areas of use include government buildings, mining, oil and gas platforms, refineries, and protection of ventilation systems. Read More

HVAC, Green & Clean

Thermal Dampers feature Class 1 and 1A leakage rates.

July 1, 2015

Employing thermally insulated and broken aluminum airfoil blades and thermally broken aluminum channel frame, TICD Series eliminate transfer of cold or heat and reduce condensation while providing air control in medium- to high-pressure and -velocity applications. Products feature AMCA Certified Leakage of Class 1 (12.6 cfm/ft² @ 10 in. wg at 60 in. wide) and Class 1A (3 cfm/ft² @ 1 in. wg at 60 in. wide) and comply with International Energy Conservation Code. Read More


Air Measuring Dampers provide accurate control.

June 17, 2015

To control airflow volumes to target set point, thermal dispersion-based AMD-TD series combines functionality of thermal dispersion airflow station and control damper. Vari-Green® airflow measurement probes and transmitters enable airflow measurement down to 100 fpm. While factory-supplied controllers are available with analog or BACnet MS/TP operation, optional factory-supplied controller makes series turn-key solution. There are 4 models that feature various blade styles. Read More

Fluid & Gas Flow Equipment, HVAC

Backdraft Damper helps meet 2014 NFPA rquirements.

March 17, 2015

KB Duct Backdraft Damper helps installers meet 2015 NFPA requirements regarding installation of Explosion Isolation Device on all suction side ducts that transport material with KST value above zero. Constructed from heavy-duty welded steel, KB-NRV no-return explosion isolation valve protects workers and facilities from damaging effects of baghouse or filter explosion. Features include flanged inlet and outlet with coflanges, inspection access door, grounding lug, and locking mechanism. Read More


Dynamic Fire Dampers comes in sizes to 128 x 100 in.

December 22, 2014

UL-Listed, non-actuated, dynamic fire dampers protect oversized openings in buildings. With fabricated steel 3V blade type, Model DFD-210 has max size of 128 x 100 in. and 1.5 hr fire resistance rating. Model DFD-230 has max size of 72 x 48 in. with 3 hr fire resistance rating, while Model DFDAF-310, which features fabricated steel airfoil blades, has max size of 128 x 100 in. and 1.5 hr fire resistance rating. With max size of 120 x 96 in., Model DFDAF-330 has 3 hr fire resistance rating. Read More


Motorized Air Damper helps optimize indoor air quality.

August 8, 2013

Available in 5–20 in. sizes, Model TMD520 introduces fresh air into building through air intake damper that is controlled by microprocessor-based ventilation interface. Made of galvanized steel, single-blade damper operates up to 1 in. wc. and features adjustable damper position range stops. Unit is shipped as power open/spring closed but can be field-converted to power close/spring open. Applications include apartment complexes, condos, single family homes, and light commercial dwellings. Read More

HVAC, Mechanical Power Transmission

Carbon-Graphite Bearings operate at high temperatures.

December 3, 2012

FDA approved for use with food/pharmaceuticals, Metcar Bearings are designed for dry running at temperatures from 350–1,000°F in oxidizing atmospheres and 350–6,000°F in non-oxidizing atmospheres. Because bearings rely on graphite for self-lubricating properties, they are dimensionally stable and are not subject to melting, softening, or deformation. Typical applications include continuous dryers, high temperature conveyors, kiln cars, and high temperature ventilation dampers. Read More


Heavy-DutyTornado Dampers prevent ductwork collapse.

October 2, 2012

Designed to protect against tornados and rapid pressure changes, Models HTOD-330 and -331 are double flanged channel frame style backdraft dampers that close, respectively, in same and opposite direction as normal flow. Products install in ductwork or mount to wall near building exterior and allow for air movement during normal weather conditions. Negative pressure caused by tornado causes damper to close, and spring-loaded blades return damper to open position after tornado passes. Read More

HVAC, Fluid & Gas Flow Equipment

Backdraft Dampers remove corrosive fumes.

June 25, 2012

Offered in PVC or CPVC construction, Backdraft Dampers come in 3 flow control types: butterfly for balancing airflow, gravity backflow preventer which closes when air pressure stops, and blast gate for on/off where space constraints exist. Units have flanged, belled, and plain ends, depending upon version. Available in sizes from 4-24 in. diameter, dampers are suited for fume and tank hoods and ventilation systems for electroplaters, manufacturers, and HVAC applications. Read More


Remote Balancing Dampers suit space-constrained applications.

September 30, 2011

Available in 2 models, Remote Balancing Dampers are suitable for applications where tight spaces make it difficult to access and manually adjust damper and balance airflow. Units use standard RJ11 cable that is run to phone jack-style plug. EZ Balance smart controller can then be plugged into jack to regulate damper's blade position and balance system. Single-blade, rectangular Model RDB-10 comes with 9 V actuator kit, while round Model RBDR-50 comes with factory-mounted 9 V actuator. Read More

HVAC, Architectural and Civil Engineering Products

Pneumatic Slide Gates help conserve energy.

June 27, 2011

Operating using compressed air cylinder, Heavy Duty Pneumatic Slide Gates are used to control air flow and conserve energy. Units are used to deliver positive shut-off to service machinery or to divert air. Available in 4-24 in. sizes, Heavy-Duty slide gates are constructed of 10 gauge body with 16 gauge blade. Extra-Heavy Duty models, made from 3/16 in. plate, are also available. Read More

HVAC, Mounting & Attaching Products

HVAC Isolator supports rooftop HVAC installations.

February 1, 2011

Using patented Seicon System®, Seicon HVAC Isolator reduces vibrations emitted from rooftop HVAC installations by more than 85%. Wind-resistant isolator minimizes living area noise and is designed for use with structurally mounted residential HVAC condensers. Unit can be attached to most surfaces and will isolate any HVAC condenser up to 400 lb when used as pair. It can also be used on heavier condensers in greater numbers. Read More

Test & Measuring Instruments, HVAC

Damper measures and regulates airflow volumes.

September 3, 2010

Combining accurate airflow measuring station and low leakage damper into one compact assembly, Air Measuring Damper series measures and regulates airflow volumes to a target set-point. It includes 4 models; AMD-23 with 3 V blade control damper, AMD-33 incorporating fabricated airfoil blade control damper, AMD-42 made of extruded airfoil blade control damper, and AMD-42V having vertical extruded airfoil blade control damper. Series is compatible with various controllers. Read More


Fire Smoke Damper provides pressure rating up to 4 in. w.g.

April 1, 2010

Featuring high-strength steel airfoil-style blade combined with profile frame design, 3 hr rated combination fire smoke damper model FSD-331 operates with velocity ratings up to 4,000 fpm. Class I leakage rated unit is available in vertical mount with maximum size of 120 x 96 in. Read More


Fire Smoke Dampers are designed for easy access.

October 30, 2009

Models GFSD-211 and GFSD-212 are out-of-wall combination fire smoke dampers designed for easy access throughe grille to the damper, closure device, and actuator. Separate compartment houses actuator, allowing for shallow operating depth of 13.5 in. Both models are qualified to velocities up to 2,000 fpm and pressure ratings up to 4 inches wg. Models GFSD-211 and GFSD-212 are available in vertical or horizontal mounts with a maximum size of 48 x 48 in. Read More


Backdraft Dampers are rated for velocities up to 2,000 fpm.

May 7, 2009

Round backdraft damper Model WDR-53 features galvanized steel frame with aluminum blade, while Model SSWDR-53 is constructed with 304 stainless steel frame and blade. They can be installed horizontally for vertical up/down airflow or mounted vertically for horizontal airflow, and offer pressures up to 2 in. wg in diameter sizes from 4-24 in. Both models are available with optional top frame extension. Read More


Hydraulic Dampers feature single or double acting design.

August 1, 2008

Offering 250,000+ cycle life, self-contained hydraulic dampers feature body diameters ranging from 15-40 mm, stroke lengths of up to 800 mm, and adjustable travel speed that remains constant throughout stroke. Variety of end fittings and mounting brackets are available for installation. Units are suited for medical, defense, packaging, bottling, printing, fitness equipment, transportation, lawn equipment, furniture, RV, and amusement industries. Read More


Iris Damper is calibrated for precise airflow measurement.

December 5, 2007

Manufactured of galvanized steel and fitted with neoprene gasket for airtight mounting, Iris Damper uses interlocking steel plates and calibrated control lever to form adjustable aperture. It permits airflow to be adjusted and measured at one location, resulting in reduced field time and accurate air balancing. Available in 10 sizes from 4-32 in. with capacities ranging from 15-20,000 cfm, compact unit controls temperature, humidity, and ventilation rate. Read More