Hvac ventilation aluminium movable louver shutter mechanical gravity damper

Gravity louver shutter:

It applies to air conditioning room with positive pressure. It exhausts air automatically. Usually the blade is vertical, it isolates the air circulation between indoor and outdoor. When the indoor pressure is bigger than the outdoor pressure, the air flow blows the blade and the inside air is exhausted. The air isn’t able to flow into room if the indoor pressure is smaller than outdoor pressure. It has single-track non-return function. Air volume damper that adjust air volume and air speed or filter that decrease dust and purify air can be set up in the back of air outlet according to customer’s requests.

We use high quality extruded aluminum to produce the gravity louver which is usually used on the outside of walls. This aluminum louver design is intended for air extraction and automatic closet of duct, when the air equipment is switched off.

GL-VA gravity louver has been anodized. It can be accurately adjusted for smooth performance. Optional colors are RAL9010 and RAL9016. Only when the exhaust fan is running that the blades of this type air louver can be opened. The blades will close automatically to preventing rains , dust, insects from getting inside rooms, one the exhaust fan is turned off.

Drawings:

Section table:

Features:

*Made of high quality extruded aluminum profiles.
*Movable and flexible blades design.
*Opposed blades damper optional.
*Color RAL9010 or RAL9016, or Anodized.
*Mounted in exterior wall and used for exhaust or air intake.

Surface Finish:
*Powder coated color finish as per RAL color--standard color: RAL9016, 9010, other stabdard RAL color is also available
*Natural anodized aluminum finish 
*Material thickness: 1.0mm

*Size as customized

Sample picture shows:

Accessories optional:

• Clips
•      A: installation clip, used for connecting the diffuser/ grille to the celing or wall.
•      B: damper fixing clip, used for connecting the diffuser/ grille to the damper.
• Coner protection
• Holes and screw
•      Insteady of clips, some people prefer punching holes on frame, and instal the diffuser/ grille with screw. 
•  Damper (can be powder coating)
•       OBD-VA, gear manual
•       OBD-VB, screw manual

Notice: The above accessories are optionals. Without any specific requirement, we deliver the products without any accessories. 

•  Ral classic color.
•        -standard Ral 9016 or 9010
•        -other colors optional.
• Anodized
• Matt or smooth surface

•  pack in strong carton, standard pallect, container.
• 10pcs/ctn without damper
•  5pcs/ctn with damper