Fluid metering device

摘要

A fluid dosing device for a pressurised fluidic medium, includes a pressurised fluid chamber (13) in a housing (1), a valve needle (3) extending through the chamber (13) and having its first end (22) subjected to a stroke action outside the chamber (13 and its second end (23) forming, together with a valve seat (2) positioned on the housing (1), a valve joined to the chamber (13 A metal bellows (17) serves as the lead-in element for the first end (22) of the valve needle (3) from the chamber (13) outwards, in which the external pressure is less than internal chamber (13) pressure, the chamber being tightly hermetically sealed.