Marine Smoke Damper[Search Related Products]
Material: galvanized steel.
Manual control type.
Normally open, when the temperature reaches 70íŠ, the valve is closed after the fuse failure, stop the smoke extending along the air duct.
When opened, it can be used as a volume control damper with 6 levels of air volume adjustment. The blade can be manually reset.
Picture of Marine Smoke Damper: