Forged Steel Gate Valve Main parts and materials Parts Name Materials Valve Bodyã??Bonnet Carbon steel Sealing Ring Stainless Steel Disc Stainless Steel Stem Stainless Steel Spacer Stainless Steel+graphite Packing Soft graphite Function and Specification PN Test Item Strength Test Seal Test Spirit seal test Suitable temperature ï¼?â??ï¼? Suitable medium 1.6 2.4 1.8 0.6 â?¦425 Waterã??Vapourã??Oil 2.5 3.8 2.8 4.0 6.15 4.51 6.4 9.75 7.15 10.0 14.4 10.56 16.0 24.75 18.15