Patent ID: 8607818

Claim:
A pressure relief valve, comprising: a base comprising a fluid inlet and a fluid outlet; a bonnet attached to the base, the base and the bonnet defining a cavity in fluid communication with the fluid inlet and the fluid outlet; a nozzle disposed within the fluid inlet and attached to the base, the nozzle having a first end comprising a substantially annular seat and a second end proximate the fluid inlet, the nozzle comprising a substantially cylindrical seat inlet that extends from the first end towards the second end, the substantially cylindrical seat having a seat diameter that defines the substantially cylindrical seat inlet from the substantially annular seat to a substantially cylindrical bore with a bore diameter proximate the second end, wherein the substantially cylindrical seat inlet is longer than the substantially cylindrical bore; a disc disposed within a disc holder, the disc having a surface facing the fluid inlet to receive a first fluidic pressure, the disc adapted to contact the seat and seal the fluid inlet to substantially prevent fluid communication between the fluid inlet and the cavity when the valve is in a closed position, the disc and the disc holder adapted to be urged by an increase of the first fluidic pressure to a second fluidic pressure such that contact between the disc and the seat is removed at the second fluidic pressure to allow fluid communication between the fluid inlet and the cavity, wherein the disc, the disc holder, and the nozzle have, respectively, a first dimension (d1), a second dimension (d2), and a third dimension (d3), with values that correspond to, d 1 =x 1*δ, d 2 =x 2*δ, d 3 =x 3*δ, where δ is the seat diameter, x1 is a first constant, x2 is a second constant that is different from the second constant, and x3 is a third constant x3 that is different from the first constant x1 and the second constant x2, wherein one of the first dimension (d1), the second dimension (d2), and the third dimension (d3) is further limited by a constraint ratio between the bore diameter and the seat diameter, and wherein the first constant, the second constant, and the third constant have a value that permits operation of said pressure relief valve with a liquid media and a gas media.