Pressure relief valves integrated in fuel pumps, for example, to protect all assemblies connected within the fuel circuit against excessive pressures, are adjusted during the calibration of the opening pressure.
A narrow tolerance range is crucial for an efficient design of the component and its service life. Therefore, this characteristic feature is of significant importance.
During the calibration, the closing pressure of the valve and thus the opening pressure is set by compressing a spring. High precision during the press-in process and exact determination of the opening pressure are crucial factors for an accurate calibration. Direct and indirect measuring procedures based on the composition of the client’s component are available for this matter.

Pressing tolerance <+/-2µm
Cycle time < 10sec