For gas and air mixtures Zone 1 and Zone 2. For dust and air mixtures Zone 21 and 22. Temperature range from -30 °C to +60 °C. Maximum flow velocity 10 m/s. Opening angle 85°. The closing flap must be correctly installed and earthed in accordance with VDE guidelines. The Ex flaps AS 65 Ex, AS 71 Ex have a central bar. Ex flap with enclosed wire grille and fastening set. Article: AS 20 Ex, Air direction: Ventilation, Installation location: Exhaust air opening on the outside wall, Installation position: vertical, Material: plastic, Color: black, Weight: 0.28 kg, Weight with packaging: 0.48 kg, Flap type: self-tapping. opening/closing, connection diameter: 209 mm, nominal width: 200 mm, suitable for nominal width: 200 mm, width: 242 mm, height: 242 mm, depth: 21 mm, width with packaging: 242 mm, height with packaging: 242 mm, depth with packaging: 21 mm