Content Container Nailor Balancing Dampers are ruggedly built and designed for manual balancing applications. They are a cost effective and reliable damper for reduced volume control and offer an economical manufactured product alternative to custom ‘shop built’ dampers. Not intended for use in shut-off or actuated applications. Models 1810 - Vee Blade • Steel • Parallel 1820 - Vee Blade • Steel • Opposed 1810FDB - Vee Blade • Steel • Parallel • Flanged Frame 1820FDB - Vee Blade • Steel • Opposed • Flanged Frame 1870 - Square or Rectangular • Single Blade 1890 - Round Submittals All Submittals Combined Individual Submittals 1810, 1820 • Vee Blade - Canada Only 1810, 1820 • Vee Blade - USA Only 1810, 1820 • Vee Blade • w/ Round Transitions - CR 1810FDB, 1820FDB • Vee Blade • Flanged Frame 1870 • Single Blade 1890 • Round • Single Blade Options and Accessories 1000, 1100, 1800, 2000 Series • Side Mounting Plate • Control Dampers HLQ, HLQ2 (HQ2) • Hand Locking Quadrant Performance Data 1810, 1820 • Pressure Drop 1870 • Single Blade • Maximum Performance Ratings 1890 • Round • Single Blade • Maximum Performance Ratings Catalog Literature Balancing & Backdraft Dampers