It is suitable for the pipe system with the medium fresh water, air & other gas, oil and steam with the temperature not over 300 centigrade degree. Design Standard: JIS F7314-1996 Test Standard: JIS 7400-1996 Hydraulic Test Pressure: Body-5.1Mpa, Seat-3.74Mpa Flange size as per JIS B2220 -20K Main Material: 1-Body:Cast Steel (SC480) 2-Seat: Bronze (BC6) or Stainless Steel (2Cr13, SCS2) 3-Disc: Bronze (BC6) or Stainless Steel (2Cr13, SCS2) 4-Stem: C3771BD (Brass) or SUS403 5-Bonnet: Cast Steel (SC480) 6-Handwheel: Cast Iron (FC200) 7-Packing Gland: Bronze (BC6) or Stainless Steel (2Cr13) 8-Gasket: non-asbestos