ENGINEERING MANUAL OF AUTOMATIC CONTROL
DAMPER SELECTION AND SIZING
445
CONTENTS
Damper Selection and Sizing
ENGINEERING MANUAL OF AUTOMATIC CONTROL
Introduction ............................................................................................................ 447
Definitions ............................................................................................................ 447
Damper Selection ............................................................................................................ 448
Damper Types ..................................................................................... 448
Parallel and Opposed Blade Dampers ............................................ 448
Round Dampers .............................................................................. 448
Low Leakage Dampers ................................................................... 448
Smoke Dampers ............................................................................. 450
Fire Dampers .................................................................................. 450
Multiple Section Dampers ............................................................... 451
Baffles ............................................................................................. 451
Typical Damper Construction .......................................................... 452
Performance Data ............................................................................... 452
Leakage Ratings ............................................................................. 452
Torque Requirements...................................................................... 454
Velocity Ratings............................................................................... 454
Temperature Ratings....................................................................... 454
Pressure Ratings ............................................................................ 454
UL Classification (Fire/Smoke)........................................................ 454
Application Environment...................................................................... 454
Velocity ............................................................................................ 454
Static Pressure................................................................................ 455
Temperature .................................................................................... 455
Corrosion ........................................................................................ 455
Turbulence....................................................................................... 455
Nuclear/Seismic Applications.......................................................... 455
Actuators and Linkages....................................................................... 455
Normally Open/Normally Closed .................................................... 455
Actuator Mounting Alternatives ....................................................... 456
Positive Positioners ......................................................................... 456
Multiple Actuators ........................................................................... 456
Jackshafts ....................................................................................... 457
Actuator Selection ........................................................................... 457
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