| 摘要 |
The invention relates to a pressure valve that comprises a body (2) forming a flow channel (4) through the pressure valve, closing blades (6) arranged to be turned between a closed position, in which the closing blades (6) are essentially transverse to the flow channel (4) of the pressure valve essentially preventing flow through the pressure valve, and an open position, in which the closing blades (6) are at an angle to the flow channel (4) of the pressure valve or essentially parallel to the flow channel (4) allowing flow through the pressure valve, and prestressing means (10, 12, 14) for prestressing the closing blades (6) into the open position and for triggering them to turn into the closed position in response to a pressure increase in the flow channel (4) of the pressure valve. The pressure valve of the invention also comprises a separate trigger (20, 22) operationally connected to the prestressing means (10, 12, 14) to trigger the closing blades (6) to turn into the closed position in response to a pressure increase in the flow channel (4) of the pressure valve.
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