an improved safety pressure relief valve which is particularly applicable to valves utilizing pressure taps for sensing the pressure within the inlet nozzle , such as pilot operated valves . the valve includes a valve body having an inlet opening into which a full nozzle is inserted . an annular port surrounds the periphery of the nozzle . an opening in the nozzle leading to the annular port provides for the insertion of a pilot or dipper tube therein . the valve body includes a channel leading between the annular port and an external tap for the pressure sensing line connected to the pilot control means . the design permits the nozzle to be rotated to any angular position with respect to the valve body , thus permitting ready assembly and disassembly of the valve . in a second embodiment , an annular port is used to permit direct injection of purging fluid into the nozzle to prevent its clogging .