Marine Bronze Fuel Oil Tank Self Closing Drain Valve is spring loaded drain valve. Design Standard: JIS F7398-1996 Test Standard: JIS 7400-1996 Hydraulic Test Pressure: Body-0.15Mpa, Seal-0.11Mpa Flange size as per JIS B2220 - 5K Main Material: 1.Body: Bronze (BC6) 2.Bonnet: Bronze (BC6) 3.Disc: Bronze (BC6) 4.Stem: Brass (C3771BD) 5.Lever: SS400 6.Gasket: non-asbestos