Fluid injector with relief valve

摘要

Relief valve (6), comprising a housing (4) having a cavity (8) with a longitudinal axis (L) and a fluid inlet (10) at an axial end of the cavity (8) being designed to receive a fluid pipe connector (12). A sealing element (16) is arranged in the cavity (8) such that it is fixed in relation to the housing (4). The sealing element (16) comprises at least one recess (18a,18b,18c) in order to enable a hydraulic communication in the cavity (8) through the at least one recess (18a,18b,18c). A spring element (20) is arranged in the cavity (8) with a first axial end (22) being fixed in relation to the housing (4) and a second axial end (24) being arranged movable in the cavity (8) facing the fluid inlet (10). A piston (26) is arranged in the cavity (8) such that at least a part of the piston (26) extends into the fluid inlet (10) in order to be operated by the fluid pipe connector (12). The Piston (26) is mechanically coupled to the second axial end (24) of the spring element (20).