Manual Balancing Dampers Home / Products / HVAC / Fans & Dampers / Manual Balancing Dampers Accordion with Plus Icon and External Links Dampers + Life Safety Dampers Control Dampers Manual Balancing Dampers Tunnel Dampers MBD-15 Features Multi-blade manual balancing damper Regulates airflow in HVAC systems. 3V Blade Type Up to 1.0 Kpa (4 in. wg) pressure Up to 10.16 m/s (2000 fpm) velocity Up to 82°C (180°F) temperature