Abstract: A linear actuator configured to axially move a plunger. The linear actuator includes a flux sleeve surrounded by a bobbin housing a wire coil. The flux sleeve defines an armature cavity extending along a movement axis, where a magnetic field is created within the flux sleeve when a current is applied to the wire coil. An armature is receivable within the armature cavity, where the magnetic field created within the flux sleeve acts upon the armature such that the armature moves along the movement axis based on the magnetic field, and where moving the armature moves the plunger. A liner is positioned within the armature cavity between the armature and the flux sleeve. The liner includes at least one of a polyamide and a polyimide.