Pilot-operated pressure relief valve nozzle

A system, comprising:

• a pilot-operated pressure relief valve configured to regulate a system pressure of a pressurized fluid system, the pilot-operated pressure relief valve including a main valve having an inlet in fluid communication with the pressurized fluid system, a pilot valve in fluid communication with the main valve, and a sensing line configured to measure an inlet pressure of the pressurized fluid system;
• and
• a pilot-operated pressure relief valve nozzle having a body with an elongate shaft disposed in the inlet and a flange disposed proximate the inlet, the elongate shaft having an inner lumen extending therethrough and in fluid communication with the inlet of the main valve, the flange having an annular notch that seats an annular ring, and the flange having an annular groove formed in the annular notch such that a first bore extending through the flange from the inner lumen to the annular notch fluidly communicates with a second bore extending through the annular ring via the annular groove thus allowing fluid communication between the inner lumen and the sensing line.

A method for regulating a system pressure of a pressurized fluid system, comprising:

• receiving, at a pilot valve, a first inlet pressure of a fluid at an inlet of a main valve, the first inlet pressure received from a sensing line coupling the pilot valve to a nozzle assembly disposed in the inlet, the fluid flowing through a sensing tube disposed in a first bore in a flange of a nozzle included in the nozzle assembly and a second bore in an annular ring of the nozzle assembly, the first bore and the second bore communicating with one another via an annular groove formed in the flange, wherein, when the first inlet pressure exceeds a predetermined threshold pressure, the pilot valve opens, and wherein the main valve reduces the first inlet pressure to a second inlet pressure that is lower than the predetermined threshold pressure in response to the opening of the pilot valve.