A valve port (136; 236; 436; 536) adapted for use with a fluid regulating device comprising a valve body and an actuator including a valve disc disposed in the valve body and adapted for displacement relative to the valve body for controlling the flow of fluid through the valve body, the valve port (136; 236; 436; 536) comprising: a housing (260; 360; 460; 560) comprising a cavity (274; 374) and an annular protrusion; a cartridge (262; 362; 462; 562) disposed within the housing (260; 360; 460; 560) and comprising an inlet end, an outlet end, and an orifice extending between the inlet and outlet ends (150, 152) for allowing a fluid to flow through the valve port (136; 236; 436; 536), the cartridge (262; 362; 462; 562) adapted for displacement relative to the housing (260; 360; 460; 560) between a first position where the outlet end extends beyond the housing (260; 360; 460; 560) at a location proximate to the annular protrusion, and a second position where the outlet end is retracted into the housing (260; 360; 460; 560); a spring (264; 364) disposed between the housing (260; 360; 460; 560) and the inlet end of the cartridge (262; 362; 462; 562) and biasing the cartridge (262; 362; 462; 562) into the first position; a primary seat (294; 394; 494; 594) carried by the outlet end of the cartridge (262; 362; 462; 562) and adapted to be sealingly engaged by the valve disc of the actuator when the cartridge (262; 362; 462; 562) is in the first position to stop the flow of fluid through the valve port (136; 236; 436; 536); and a secondary seat (267; 367) carried by the annular protrusion of the housing (260; 360; 460; 560) at a location proximate to the outlet end of the cartridge (262; 362; 462; 562), the secondary seat (267; 367) adapted to be sealing engaged by the valve disc of the actuator when the cartridge is (262; 362; 462; 562) in the second position to stop the flow of fluid through the valve port (136; 236; 436; 536); and a pneumatic seal (283; 583) disposed between the housing (260; 360; 460; 560) and the cartridge (262; 362; 462; 562), the pneumatic seal (283; 583) providing a seal between the housing (260; 360; 460; 560) and the cartridge (262; 362; 462; 562) when the cartridge (262; 362; 462; 562) is in the first position, and the pneumatic seal (283; 583) not providing a seal between the housing (260; 360; 460; 560) and the cartridge (262; 362; 462; 562) when the cartridge (262; 362; 462; 562) is in the second position. a housing (260; 360; 460; 560) comprising a cavity (274; 374) and an annular protrusion; a cartridge (262; 362; 462; 562) disposed within the housing (260; 360; 460; 560) and comprising an inlet end, an outlet end, and an orifice extending between the inlet and outlet ends (150, 152) for allowing a fluid to flow through the valve port (136; 236; 436; 536), the cartridge (262; 362; 462; 562) adapted for displacement relative to the housing (260; 360; 460; 560) between a first position where the outlet end extends beyond the housing (260; 360; 460; 560) at a location proximate to the annular protrusion, and a second position where the outlet end is retracted into the housing (260; 360; 460; 560); a spring (264; 364) disposed between the housing (260; 360; 460; 560) and the inlet end of the cartridge (262; 362; 462; 562) and biasing the cartridge (262; 362; 462; 562) into the first position; a primary seat (294; 394; 494; 594) carried by the outlet end of the cartridge (262; 362; 462; 562) and adapted to be sealingly engaged by the valve disc of the actuator when the cartridge (262; 362; 462; 562) is in the first position to stop the flow of fluid through the valve port (136; 236; 436; 536); and a secondary seat (267; 367) carried by the annular protrusion of the housing (260; 360; 460; 560) at a location proximate to the outlet end of the cartridge (262; 362; 462; 562), the secondary seat (267; 367) adapted to be sealing engaged by the valve disc of the actuator when the cartridge is (262; 362; 462; 562) in the second position to stop the flow of fluid through the valve port (136; 236; 436; 536); and a pneumatic seal (283; 583) disposed between the housing (260; 360; 460; 560) and the cartridge (262; 362; 462; 562), the pneumatic seal (283; 583) providing a seal between the housing (260; 360; 460; 560) and the cartridge (262; 362; 462; 562) when the cartridge (262; 362; 462; 562) is in the first position, and the pneumatic seal (283; 583) not providing a seal between the housing (260; 360; 460; 560) and the cartridge (262; 362; 462; 562) when the cartridge (262; 362; 462; 562) is in the second position.