It has logical structure ,reliable seal,excellent peroformance and nice design Cast steel globe valve1.it has logical structure ,reliable seal,excellent peroformance and nice design.2.Sealing face is overlayed by STL,which is friction-resisance ,corrosion-resistaned to ensure a long time use life.3.Stem Heat-treatment and surface nitriding-treatment to sure fuction of corrosion-resistanced and ...