Pressure Relief Dampers - HPR-330

The HPR-330 is an industrial pressure relief damper with double-flanged channel frame. It is designed to protect HVAC systems and industrial processes by relieving air pressure. Blade Type: Fabricated Airfoil Pressure Relief: ½ in. wg to 6 in. wg (.012 - 1.5 kPa) Back Pressure: 13½ - 20 in. wg (3.4 - 5 kPa) Velocity: Up to 6400 fpm (32.5 m/s) Temperature: -40°F to 250°F (-40 to 121°C)