BC4-3B57-1NE00000A

Model "1000HP" Pressure Reducing Regulator,Tfe/Sil. Gaskets; 1/2" Size,Gaseous Jet; Bronze Body & Spring Chamber (Opt-5), Cryogenic Construction;Opt-55: Cleaned For Oxygen Service Per Spec #S-1134; B5 Trim: Brass With Tfe Seat,Phos.Bronze Diaphragm; Npt Screwed; 120-300 PSIG SST Range Spring; Opt-12+14: One-Step Reduced Orifice,Integral Seat