Should I use thread-seal tape for steam pipe? [solved]

I am getting ready to replace the pressuretrol of my oil-burning steam boiler, which provides heat and hot water. Should I use thread-seal tape (aka. Teflon tape, PTFE tape, tape dope, or plumber's tape) when attaching the new pressuretrol? If so, should I use the same kind of tape that I use for water pipes, or is there a special kind for use with steam pipes?

(The pressuretrol datasheet describes the connector as “1/4 inch female pipe thread.” I presume that is a synonym for national pipe thread taperered thread (NPT), so the threads themselves are providing the seal, and there is no gasket.)