A fluid regulator, comprising: a regulator body defining a fluid inlet, a fluid outlet, and a fluid flow path therebetween; a control element configured to control a fluid flow through the regulator body; an actuator operatively coupled to the control element and configured to control a position of the control element, the actuator comprising: an actuator housing; a diaphragm disposed within the actuator housing and movable within the actuator housing in response to pressure changes at the fluid inlet or the fluid outlet; a first chamber defined adjacent a first side of the diaphragm; and a second chamber defined adjacent a second side of the diaphragm; an exhaust vent formed in the actuator housing to fluidly couple the second chamber to the atmosphere; and a pressure control assembly operably coupled to the exhaust vent and configured to maintain a pre-determined pressure within the second chamber during operation of the actuator, characterized in J the pressure control assembly comprising: a spacer arranged within an orifice of the exhaust vent; a barrier positioned adjacent to the spacer within the orifice; a plug having a first annular portion and a second annular portion, the first annular portion being coupled to the actuator housing outside of the exhaust vent, such that the first annular portion is positioned outside of the actuator housing, and the second annular portion positioned adjacent to the barrier within the orifice of the exhaust vent, such that the second annular portion is positioned within the actuator housing; and a flexible element coupled to the spacer and configured to move in response to movement of the diaphragm during operation of the actuator, wherein in response to movement of the diaphragm in a first direction, the flexible element is configured to move in a second direction different from the first direction to increase or decrease a volume of the second chamber. a regulator body defining a fluid inlet, a fluid outlet, and a fluid flow path therebetween; a control element configured to control a fluid flow through the regulator body; an actuator operatively coupled to the control element and configured to control a position of the control element, the actuator comprising: an actuator housing; a diaphragm disposed within the actuator housing and movable within the actuator housing in response to pressure changes at the fluid inlet or the fluid outlet; a first chamber defined adjacent a first side of the diaphragm; and a second chamber defined adjacent a second side of the diaphragm; an exhaust vent formed in the actuator housing to fluidly couple the second chamber to the atmosphere; and an actuator housing; a diaphragm disposed within the actuator housing and movable within the actuator housing in response to pressure changes at the fluid inlet or the fluid outlet; a first chamber defined adjacent a first side of the diaphragm; and a second chamber defined adjacent a second side of the diaphragm; an exhaust vent formed in the actuator housing to fluidly couple the second chamber to the atmosphere; and a pressure control assembly operably coupled to the exhaust vent and configured to maintain a pre-determined pressure within the second chamber during operation of the actuator, characterized in J the pressure control assembly comprising: a spacer arranged within an orifice of the exhaust vent; a barrier positioned adjacent to the spacer within the orifice; a plug having a first annular portion and a second annular portion, the first annular portion being coupled to the actuator housing outside of the exhaust vent, such that the first annular portion is positioned outside of the actuator housing, and the second annular portion positioned adjacent to the barrier within the orifice of the exhaust vent, such that the second annular portion is positioned within the actuator housing; and a flexible element coupled to the spacer and configured to move in response to movement of the diaphragm during operation of the actuator, a spacer arranged within an orifice of the exhaust vent; a barrier positioned adjacent to the spacer within the orifice; a plug having a first annular portion and a second annular portion, the first annular portion being coupled to the actuator housing outside of the exhaust vent, such that the first annular portion is positioned outside of the actuator housing, and the second annular portion positioned adjacent to the barrier within the orifice of the exhaust vent, such that the second annular portion is positioned within the actuator housing; and a flexible element coupled to the spacer and configured to move in response to movement of the diaphragm during operation of the actuator, wherein in response to movement of the diaphragm in a first direction, the flexible element is configured to move in a second direction different from the first direction to increase or decrease a volume of the second chamber.