الوصف
Blue Sky Model GSD horizontal operable shutter Damper are designed to equalize the pressure across it.
The baldes are designed and positioned in such away that if the pressure in the room increase the blades automatically lift and open relieving the pressure in the room .
The frame and blades are extruded aluminum alloy and are polyester powder coated.
Blue Sky Model GSD are also employed at the end of exhaust ducts where they close when the fan was turned off.
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