| 摘要 |
A differential pressure valve is disclosed, comprising: a valve body (111), said valve body having at least one flow inlet (118) and one flow outlet (120); at least one shutter (112), said shutter being movable between an open position and a closed position under a differential pressure across the valve; a flow passage (126) from the flow inlet (118) to the flow outlet (120); at least one biasing member (114) configured to bias the shutter (112) towards a closed position so as to block the flow passage through the flow inlet (118). The biasing member (114) comprises at least two springs (114A, 114B) arranged in parallel, one of said springs having at least one resonance frequency different from at least one resonance frequency of the other of said two springs. |
