Body SS316, C-22, Brass O-ring Viton or Silicone Seat PCTFE (VESPEL Optional) Seals Viton / Bonnet, Cap, Plate Nickel-Plated Brass Knob ABS Plastic or AI Pressure rating per criteria of ANSI / ASME B31.3 maximum rated inlet pressure 500psig Controlled pressure ranges 0-500psig Design proof pressure 150% maximum rated Leakage Bubble-tight Ambient Operating & Fluid Media Temperature -40℃ ~ 100℃ Flow Capacity Cv=0.09 Internal Volume 8 cc Connections 1/4" NPTF, 1/2" NPTF, Hiflux Port Type (ex H2004)