| 摘要 |
A safety valve (100) for pressure equalisation between a closed space and the environment is disclosed. The valve comprises a first valve for relief of overpressure and a second valve for relief of negative pressure, an enclosing, elongated housing (5, 10, 28) having a first end with an opening in communication with the closed space, and a second end having an outlet opening (3) for the first valve, and at least one inlet opening (36) to the second valve is provided in the housing wall, and a flow optimised drop configured body (1) is provided in the outlet opening (3) for the first valve, said drop configured body (1) is connected via a rod (4) to an underneath located pressure weight (6) constituting a valve body within the housing and which, when the valve is not pressure equalising, is abutting a valve seat (9) provided within the housing. The housing (5, 10, 28) is flow optimised configured towards the outlet opening (3) in that the housing is continuous tapering towards the contact surface (3a) of the outlet opening (3) against the drop configured body (1). The drop configured body (1) has controlled, axially freedom of motion in respect of the rod (4) and the pressure weight (6). The safety valve (100) also comprises a means (50) for independent check of the state of the respective valves. |
