Design Standard: JIS F7356-1996 Test Standard: JIS 7400-1996 Hydraulic Test Pressure: Body- 1.05Mpa, Seat-0.77Mpa~0.4Mpa Flange size as per JIS B2220 - 5K Main Material: 1-Body: Bronze (BC6) 2-Bonnet: Bronze (BC6) 3-Disc: Bronze (BC6) 4-Gasket: non-asbestos