A fluid regulating device, comprising: a control assembly comprising a control element and a diaphragm operably connected to the control element, the control element adapted for displacement to control the flow of a fluid through the regulating device; a relief valve operably associated with the control assembly and adapted to provide overpressure protection to the regulating device; an actuator housing defining a cavity containing at least a portion of the control assembly, the actuator housing comprising an upper housing component and a lower housing component, the upper and lower housing components (220a, 20b) each comprising a flange (225, 25b) disposed adjacent a peripheral portion of the diaphragm, characterized in that the upper housing component including a shell portion; a plurality of fasteners securing the flanges (225, 25b) of the upper and lower housing components (220a, 20b) together to seal the peripheral portion of the diaphragm therebetween; a vent defined by the upper housing component and containing the relief valve, the vent comprising an upright portion and a coupling portion disposed perpendicular to each other, the upright portion extending upward from the shell portion of the upper housing component and the coupling portion disposed at least partially above a top surface of the flange of the upper housing component; and a seating surface defined by the top surface of the flange of the upper housing component, against which the plurality of fasteners seat, the seating surface comprising a continuous ring-shaped surface providing unobstructed access to the plurality of fasteners. a control assembly comprising a control element and a diaphragm operably connected to the control element, the control element adapted for displacement to control the flow of a fluid through the regulating device; a relief valve operably associated with the control assembly and adapted to provide overpressure protection to the regulating device; an actuator housing defining a cavity containing at least a portion of the control assembly, the actuator housing comprising an upper housing component and a lower housing component, the upper and lower housing components (220a, 20b) each comprising a flange (225, 25b) disposed adjacent a peripheral portion of the diaphragm, characterized in that the upper housing component including a shell portion; a plurality of fasteners securing the flanges (225, 25b) of the upper and lower housing components (220a, 20b) together to seal the peripheral portion of the diaphragm therebetween; a vent defined by the upper housing component and containing the relief valve, the vent comprising an upright portion and a coupling portion disposed perpendicular to each other, the upright portion extending upward from the shell portion of the upper housing component and the coupling portion disposed at least partially above a top surface of the flange of the upper housing component; and a seating surface defined by the top surface of the flange of the upper housing component, against which the plurality of fasteners seat, the seating surface comprising a continuous ring-shaped surface providing unobstructed access to the plurality of fasteners.