WATTS STRAINERS STEEL BALL VALVE DN 100 X3777 (WATTS - 149B6051)

The HB-330 heavy duty industrial backdraft damper features a double flanged galvanized steel frame and double thickness fabricated airfoil blades. External heavy duty linkage, blade counterbalance and ball bearings all are standard.

Pressure: Up to 20 in. wg (5 kPa)

Velocity: Up to 6400 fpm (32.5 m/s)

Temperature: -40°F to 250°F (-40°C to 121°C)