Device for pressure relief in a ventilation system

摘要

For pressure relief in a ventilation system, a device is proposed which comprises a housing (1) capable of receiving a horizontal flow, and a flap (3) pivotably mounted therein about a horizontal shaft (2). The shaft (2) subdivides the flap (3) into a smaller flap section (5) and a larger flap section (4). In the region of the shaft (2), the flap (3) is connected to a carrying arm (7) equipped with a displaceable restoring weight (3). On the incident-flow side of the flap (3), a flexible sealing disc (11) extending over the circumference of the flap is provided, which is fastened to the housing (1) in the outer edge region of the larger flap section (4) and is fastened thereto in the outer edge region of the smaller flap section (5). The device constructed in this way permits a switching behaviour so that, when a rapid pressure increase occurs in the conduit system of a ventilation system, the flap (3) opens as soon as a specific opening pressure is reached, and a further pressure increase above a maximum permissible pressure in the duct system is prevented. <IMAGE>