electrical and gas connector with sealed gas flow are provided that may facilitate fewer components and simplified construction for example in certain embodiments a schrader valve is used to control the flow of gas through the connectors while in other embodiments a preassembled valve assembly is used to control the flow of gas through the connectors in either case the connectors are manufactured in a simplified manner using fewer components turning now to the figures fig1 is a schematic diagram of an exemplary welding system 10 which powers controls and provides supplies to a welding operation the welding system 10 includes a welding power supply 12 a wire feeder 14 a torch 16 and a workpiece 18 the welding power supply 12 receives primary power 20 e g from the ac power grid an engine generator set a battery or a combination thereof conditions the input power and provides an output power to one or more welding devices in accordance with demands of the system 10 the primary power 20 may be supplied from an offsite location i e the primary power may originate from a wall outlet the welding power source 12 includes power conversion circuitry 22 that may include circuit elements such as transformers rectifiers switches and so forth capable of converting the ac input power to a dcep or dcen output as dictated by the demands of the system 10 such circuits are generally known in the art it should be noted however that the cable structures disclosed herein may be used with any desired welding application or process that relies on the provision of power and shielding gas this might include for example ac welding processes.