Design Standard: JIS F3056-1995 Test Standard: JIS F7400-1996 Hydraulic Pressure Test: Body-0.2Mpa Flange size as per JIS B2220 5K or 10K Coupling screws for top and bottom parts of body shall conform to JIS B0207. Pan head machine screw shall conform to JIS B1101. Main Material: 1-Body(Upper part): Bronze (BC6) 2-Body(Lower part): Bronze (BC6) 3-Gasket: NBR 4-Valve: Bronze (BC6) 5-Valve Gasket: NBR 6-Gasket Keep: C2600P 7-Pan Head Machine Screw:C4641BD