Pipe thread in accordance: npt, bspt, bsp, iso-228 class a thread Temperature range: Ptfe: -20~180 Tfm: -50~270 Rptfe: -35~210 Suitable medium: water, oil, air and some corrosive liquid(w.O.G) Nominal pressure: 1000psi(pn63) for 1/2" to 3" Stem: blow-out proof Locking device Material: cf8m(din 1.4408), cf8(din 1.4308), wcb(din 1.0619).