The ultimate safety net against abnormal conditions inside bins or silos. VHS Pressure Relief Valves are the last safety net when abnormal pressure conditions endanger the silo structure. This is why sudden excess or suction pressure inside the silo must be dealt with instantly. Even though ideally a VHS Pressure Relief Valve should never have to go into action, it must be efficient and reliable if needed. Features innovative operating principle enabling instantaneous pressure balance, time saving maintenance and dust emission recovery possible.