Overpressure grilles SagiCofim Technical features GP 100 and 50 overpressure grilles are used for natural air intake and exhaust system in rooms, by using the pressure difference between the two sides. The blades can move freely and they allow air to pass through until the pressure between the two sides is balanced. At this point they close automatically due to gravity. GP 100 and 50 overpressure grilles are made by a galvanized steel sheet frame and a row of aluminum blades, each with a tight gasket; the blades rotate on nylon bushes fitted with a stopper to avoid blade counter-rotation. The direction of the air flow (must be specified in the order) in relation with the grilles is the following: • GP 100 D, 50 D exhaust flow from grilles • GP 100, 50 S supply flow from grilles Other versions available: • GP 101,51 D/S with grid GP 100 D (expulsion) - GP 100 S (aspiration) Height Width (mm) H double field structure GP 101 D (with expulsion grid) - GP 101 S (with aspiration grid) Height Width (mm) H double field structure Specify L x H in the order. Wall counter-frame, see technical data sheet WR 001

Overpressure grilles GP 100 - GP 50 Technical draft GP 100 S (aspiration) Technical draft GP 50 D (expulsion) - GP 50 S (aspiration) Height (mm) H 150 250 350 450 550 650 GP 51 D (with expulsion grid) - GP 51 S (with aspiration grid) Height (mm) H Wall counter-frame, see technical data sheet WR 001