An apparatus for use with a rotary fluid valve having a valve body and a closure member to visually detect seal failure or seal leakage, comprising: a shaft, wherein a first portion can be disposed within an outboard opening of the valve body and a second portion can be disposed within a cavity of the closure member, and a seal leakage detector comprising a passageway, characterized in that, the shaft has a stationary seal disposed in the first portion of the shaft to prevent fluid leakage into the outboard opening of the valve body during use, and a dynamic seal disposed in the second portion of the shaft to prevent fluid leakage into the cavity of the closure member during use, the dynamic seal being spaced from the stationary seal, wherein the stationary seal defines a first leakage detection area adjacent the stationary seal and the dynamic seal defines a second leakage detection area adjacent the dynamic seal; and wherein the seal leakage detector is integrally formed with the shaft to provide a visual indication of process fluid leakage within the first leakage detection area or within the second leakage detection area and the passageway is in fluid communication with the first leakage detection area and the second leakage detection area, and wherein the passageway fluidly couples the first leak detection area and the second leak detection area to the atmosphere via an opening adjacent an outer surface of a flange of the shaft, and wherein the passageway includes a first passageway in fluid communication with the first leakage detection area and the atmosphere and a second passageway in fluid communication with the second leakage detection area and the atmosphere and wherein the first passageway has a first cross-sectional area and the second passageway has a second cross-sectional area smaller than the first cross-sectional area, wherein the cross-sectional area of the passageway changes between the first and the second leakage detection areas (258, 260) to increase or to be larger toward the opening to provide a pressure differential between the first and second passageways (280, 282) such that any fluid that can be in the passageway will flow toward the opening of the shaft instead of flowing toward the first and second leakage detection areas (258, 260) to prevent fluid from flowing from one of the leakage detection areas (258, 260) into the body of the fluid valve. a shaft, wherein a first portion can be disposed within an outboard opening of the valve body and a second portion can be disposed within a cavity of the closure member, and a seal leakage detector comprising a passageway, characterized in that, the shaft has a stationary seal disposed in the first portion of the shaft to prevent fluid leakage into the outboard opening of the valve body during use, and a dynamic seal disposed in the second portion of the shaft to prevent fluid leakage into the cavity of the closure member during use, the dynamic seal being spaced from the stationary seal, wherein the stationary seal defines a first leakage detection area adjacent the stationary seal and the dynamic seal defines a second leakage detection area adjacent the dynamic seal; and wherein the seal leakage detector is integrally formed with the shaft to provide a visual indication of process fluid leakage within the first leakage detection area or within the second leakage detection area and the passageway is in fluid communication with the first leakage detection area and the second leakage detection area, and wherein the passageway fluidly couples the first leak detection area and the second leak detection area to the atmosphere via an opening adjacent an outer surface of a flange of the shaft, and wherein the passageway includes a first passageway in fluid communication with the first leakage detection area and the atmosphere and a second passageway in fluid communication with the second leakage detection area and the atmosphere and wherein the first passageway has a first cross-sectional area and the second passageway has a second cross-sectional area smaller than the first cross-sectional area, wherein the cross-sectional area of the passageway changes between the first and the second leakage detection areas (258, 260) to increase or to be larger toward the opening to provide a pressure differential between the first and second passageways (280, 282) such that any fluid that can be in the passageway will flow toward the opening of the shaft instead of flowing toward the first and second leakage detection areas (258, 260) to prevent fluid from flowing from one of the leakage detection areas (258, 260) into the body of the fluid valve.