Goods, articles and parts of ship's appliances: rectangular ventilating water-gas-tight covers

Purpose: ventilation rectangular covers used in ventilation and air conditioning systems of ships, vessels and watercraft.
Types: I - steel covers with hinges on the short side; II - steel and light alloy covers with hinges on the long side.
Version: 1 - with louvres (blades parallel to the long side);
2 - with louvres (blades parallel to the short side); 3 - with mesh (only for steel covers).
Design features:
Type I: conditional passage 150-500mm; thickness of the coamings 3mm.
Method of fastening: welding.
Main material: steel