We are offering butterfly dampers
miteck offers a complete line of heavy-duty butterfly dampers to meet your requirements. We have installed butterfly dampers as small as 2” diameter, to as large as 120” diameters and more. Our butterfly dampers can be found in some of the harshest environments where abrasion, corrosion and dust-loading are prevalent. Butterfly dampers are not as precise as louver dampers for flow control but can be used for modulation when precision is not critical. For more precise flow control applications, opposed multi blade circular louver dampers can be used.
miteck offers many configurations to meet your application.also offering guillotine dampers, industrial damper, damper valves, louver damper, air damper, motorized damper, diverter valve and duct damper.
isolation applications:
round butterfly:
sealing efficiencies for rectangular butterfly dampers range from 99.00% to 99.75% and 100% with seal air
multi-blade louver dampers offer sealing efficiencies from 98.00% to 99.50% and 100% in double louver configurations
guillotine dampers provide sealing efficiencies from 99.75% without seal air and 100% with seal air
operating times range from ½ to 1 sec. For louvers, 1 sec. For butterflies, and 10 sec min and are size dependent for guillotines
static pressure loss is minimal with guillotine dampers and greatest with louver dampers
louver dampers are available in parallel or opposed blade configurations for improved flow control where sealing efficiency is important but improved control is also desired.
rectangular butterfly:
sealing efficiencies for rectangular butterfly dampers range from 99.00% to 99.75% and 100% with seal air
multi-blade louver dampers offer sealing efficiencies from 98.00% to 99.50% and 100% in double louver configurations (w/seal air)
operating times range from ½ to 1 sec. For louvers, 1 sec. For butterflies, and 10 sec min and are size dependent for guillotines
louver dampers are more costly than butterflies but less than guillotines
control applications:
round flange butterfly damper:
flow control of gas in round ducts is best accomplished with round opposed-blade
butterfly dampers provide excellent control of static pressure and volume in mid-range, but less than adequate low-flow control when compared to opposed-blade louvers
radial vane dampers are preferred for control of gas entering centrifugal or radial fans
flap diverter dampers are designed to control flow during startup of waste heat equipment
positioning devices with analog or digital inputs are available to maintain reliable flow control on most damper configurations
rectangular flange butterfly damper :
opposed-blade louver dampers provide superior control of static pressure and volume for rectangular duct applications
increasing the number of opposed-blades between 2 through 6 generally improves flow control characteristics
designed to control flow during startup of waste heat equipment
positioning devices with analog or digital inputs are available to maintain reliable flow control on most damper configurations.

We are offering butterfly dampers
miteck offers a complete line of heavy-duty butterfly dampers to meet your requirements. We have installed butterfly dampers as small as 2” diameter, to as large as 120” diameters and more. Our butterfly dampers can be found in some of the harshest environments where abrasion, corrosion and dust-loading are prevalent. Butterfly dampers are not as precise as louver dampers for flow control but can be used for modulation when precision is not critical. For more precise flow control applications, opposed multi blade circular louver dampers can be used.
miteck offers many configurations to meet your application.also offering guillotine dampers, industrial damper, damper valves, louver damper, air damper, motorized damper, diverter valve and duct damper.
isolation applications:
round butterfly:
sealing efficiencies for rectangular butterfly dampers range from 99.00% to 99.75% and 100% with seal air
multi-blade louver dampers offer sealing efficiencies from 98.00% to 99.50% and 100% in double louver configurations
guillotine dampers provide sealing efficiencies from 99.75% without seal air and 100% with seal air
operating times range from ½ to 1 sec. For louvers, 1 sec. For butterflies, and 10 sec min and are size dependent for guillotines
static pressure loss is minimal with guillotine dampers and greatest with louver dampers
louver dampers are available in parallel or opposed blade configurations for improved flow control where sealing efficiency is important but improved control is also desired.
rectangular butterfly:
sealing efficiencies for rectangular butterfly dampers range from 99.00% to 99.75% and 100% with seal air
multi-blade louver dampers offer sealing efficiencies from 98.00% to 99.50% and 100% in double louver configurations (w/seal air)
operating times range from ½ to 1 sec. For louvers, 1 sec. For butterflies, and 10 sec min and are size dependent for guillotines
louver dampers are more costly than butterflies but less than guillotines
control applications:
round flange butterfly damper:
flow control of gas in round ducts is best accomplished with round opposed-blade
butterfly dampers provide excellent control of static pressure and volume in mid-range, but less than adequate low-flow control when compared to opposed-blade louvers
radial vane dampers are preferred for control of gas entering centrifugal or radial fans
flap diverter dampers are designed to control flow during startup of waste heat equipment
positioning devices with analog or digital inputs are available to maintain reliable flow control on most damper configurations
rectangular flange butterfly damper :
opposed-blade louver dampers provide superior control of static pressure and volume for rectangular duct applications
increasing the number of opposed-blades between 2 through 6 generally improves flow control characteristics
designed to control flow during startup of waste heat equipment
positioning devices with analog or digital inputs are available to maintain reliable flow control on most damper configurations.