Marine Cast Steel Angle Vavel JIS F7350 is used as the suction sea valve. Design Standard: JIS F7350-1996, CB/T4021-2005 Max Working Pressure for DN350 & above: 0.2Mpa Test Pressure for body: 0.5Mpa Test Pressure for the sealing: 0.25Mpa Main Parts & Material: Body---Cast Steel Bonnet---Cast Steel Disc---Stainless Steel SCS2 Stem---Stainless Steel SUS403