The Boeing Company
Hydraulic Pressure Relief Valve With Integrated Calibration Mechanism

Abstract:

In an example, a pressure relief valve is described. The pressure relief valve comprises a housing configured to allow fluid flow therethrough. The pressure relief valve also comprises an adapter having interior threads, where the adapter is attached to the housing such that the adapter is positioned at least partially within the housing. The pressure relief valve also comprises an orifice plate having an orifice formed therein to allow fluid flow therethrough, where the orifice plate comprises exterior threads that engage with the interior threads of the adapter to couple the orifice plate to the adapter. The pressure relief valve also comprises a spring disposed within the housing. The orifice plate translates via engagement of the exterior threads with the interior threads to calibrate a spring force of the spring.